11-1 ENGINE CONTENTS GENERAL INFORMATION . . . . . . . . . . . . . . . . 2 EXHAUST MANIFOLD . . . . . . . . . . . . . . . . . 31 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . 3 WATER PUMP AND WATER HOSE . . . . . 34 Service Specifications . . . . . . . . . . . . . . . . . . . . . . 3 Torque Specifications . . . . . . . . . . . . . . . . . . . . . . 5 ROCKER ARMS AND CAMSHAFT . . . . . . 37 New Tightening Method by Use of Bolts to Be Tightened in Plastic Area . . . . . . . . . . . . 9 CYLINDER HEAD AND VALVES . . . . . . . . 43 Sealants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 FRONT CASE, COUNTERBALANCE SHAFT AND OIL PAN . . . . . . . . . . . . . . . . . 51 Form-In-Place Gasket . . . . . . . . . . . . . . . . . . . . 10 SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . 11 ALTERNATOR AND IGNITION SYSTEM . 14 TIMING BELT . . . . . . . . . . . . . . . . . . . . . . . . . 15 FUEL AND EMISSION CONTROL PARTS 27 SECONDARY AIR SYSTEM AND INTAKE MANIFOLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 PISTON AND CONNECTING ROD . . . . . . 59 CRANKSHAFT AND FLYWHEEL . . . . . . . . 67 THROTTLE BODY . . . . . . . . . . . . . . . . . . . . . 73 TURBOCHARGER . . . . . . . . . . . . . . . . . . . . . 75 ALTERNATOR . . . . . . . . . . . . . . . . . . . . . . . . . 79 STARTER MOTOR . . . . . . . . . . . . . . . . . . . . . 83 11-2 ENGINE – General Information GENERAL INFORMATION Descriptions Specifications Type In-line OHV, SOHC Number of cylinders 4 Combustion chamber Pentroof + curved top piston type Total displacement dm3 1,997 Cylinder bore mm 85.0 Piston stroke mm 88.0 Compression ratio 8.8 Valve timing Intake valve Exhaust valve Opens (BTDC) 21° Closes (ABDC) 59° Opens (BBDC) 58° Closes (ATDC) 18° Lubrication system Pressure feed, full-flow filtration Oil pump type Involute gear type 11-3 ENGINE – Specifications SPECIFICATIONS SERVICE SPECIFICATIONS Items Standard value Limit Auto-tensioner rod projection length mm 12 – Auto-tensioner rod pushed-in amount [when pushed with a force of 98 – 196 N] mm 1.0 or less – Intake 35.79 35.29 Exhaust 35.49 34.99 26 – Cylinder head flatness of gasket surface mm Less than 0.05 0.2 Cylinder head grinding limit of gasket surface mm Total resurfacing depth of both cylinder head and cylinder block – 0.2 Cylinder head overall height mm 131.9 – 132.1 – Cylinder head bolt shank length mm – Maximum 99.4 Intake 1.0 0.5 Exhaust 1.5 1.0 Intake 109.5 109.0 Exhaust 109.7 109.2 Intake 0.02 – 0.05 0.10 Exhaust 0.05 – 0.09 0.15 Valve face angle 45° – 45.5° – Valve spring free length mm 48.3 47.3 Valve spring load/installed height N/mm 294/40.0 – Valve spring out-of-squareness 1.5° or less Maximum 4° Valve seat contact width mm 0.9 – 1.3 – Valve guide inner diameter mm 6.6 – Valve guide projection from cylinder head upper surface mm 20.5 – Valve stem projection mm Intake 49.20 49.70 Exhaust 48.40 48.90 0.05 O.S. 12.05 – 12.07 – 0.25 O.S. 12.25 – 11.27 – 0.50 O.S. 12.50 – 12.52 – Timing belt Rocker arms and camshaft Camshaft cam height mm Camshaft journal outer diameter mm Cylinder head and valves Valve thickness of valve head (margin) mm Overall valve length mm Valve thickness to valve guide clearance mm Oversize rework dimensions of valve guide hole mm 11-4 ENGINE – Specifications Items Standard value Limit 0.3 O.S. 35.30 – 35.33 – 0.6 O.S. 35.60 – 35.63 – 0.3 O.S. 33.30 – 33.33 – 0.6 O.S. 33.60 – 33.63 – Drive gear 0.08 – 0.14 – Driven gear 0.06 – 0.12 – 78 or more – 85.0 – No. 1 ring 0.04 – 0.075 – No. 2 ring 0.02 – 0.06 – No. 1 ring 0.25 – 0.35 0.8 No. 2 ring 0.40 – 0.55 0.8 Oil ring 0.10 – 0.40 1.0 Piston pin outer diameter mm 21.0 – Piston pin press-in load N (Room temperature) 7,350 – 17,200 – Crankshaft pin oil clearance mm 0.02 – 0.05 0.1 Connecting rod big end side clearance mm 0.10 – 0.25 0.4 Crankshaft end play mm 0.05 – 0.25 0.40 Crankshaft journal outer diameter mm 57.0 – Crankshaft pin outer diameter mm 44.0 – Crankshaft journal oil clearance mm 0.02 – 0.04 0.1 Bearing cap bolt shank length mm – Maximum 71.1 Piston to cylinder clearance mm 0.02 – 0.04 – Cylinder block grinding limit of gasket surface mm Total resurfacing depth of both cylinder head and cylinder block – 0.2 Cylinder block overall height mm 284 – Cylinder block inner diameter mm 85.0 – Cylinder block cylinder mm 0.01 – 100 113.3 Intake oversize rework dimensions of valve guide hole mm Exhaust oversize rework dimensions of valve guide hole mm Front case and oil pan Oil pump side clearance mm Oil pressure at curb idle speed kPa [Oil temperature is 75 to 90°C] Piston and connecting rod Piston outer diameter mm Piston ring side clearance mm Piston ring end gap mm Crankshaft and flywheel Turbocharger Waste gate actuator operation check kPa 11-5 ENGINE – Specifications Items Standard value Limit Rotor coil resistance Ω Approx. 3 – 5 – Protrusion length of brush mm – 2 Commutator runout mm 0.05 0.1 Commutator outer diameter mm 32.0 31.4 Commutator undercut mm 0.5 – Alternator Starter motor TORQUE SPECIFICATIONS Items Nm Alternator and ignition system Oil level gauge guide 13 Water pump pulley 9 Alternator brace (Alternator side) 21 Alternator brace (Tightened with water pump) 23 Alternator pivot bolt 44 Crankshaft pulley 25 Center cover 3 Spark plug 25 Ignition coil 10 Timing belt Timing belt cover (Flange bolt) 11 Timing belt cover (Washer bolt) 9 Power steering pump bracket 49 Tensioner pulley 49 Tensioner arm 24 Auto tensioner 24 Idler pulley 48 Crank angle sensor 9 Oil pump sprocket 54 Camshaft bolt 118 Tensioner “B” 19 Counterbalance shaft sprocket 45 11-6 ENGINE – Specifications Items Nm Rocker cover 3.5 Engine support bracket 49 Camshaft sprocket bolt 88 Timing belt rear right cover 11 Timing belt rear left upper cover 11 Fuel and emission control parts Throttle body 18 Fuel pressure regulator 9 Delivery pipe 11 Vacuum tank bracket 9 Solenoid valve bracket 9 Solenoid valve 9 Vacuum hose and vacuum pipe 11 Secondary air intake manifold Heat protector 13 Vacuum hose and vacuum pipe 11 Air pipe (Heat protector side) 13 Air pipe (Cam position sensor side) 11 Air pipe (Eye bolt) 49 Air pipe (Control valve side) 24 Air control valve 21 Air control valve bracket 24 Intake manifold stay 30 Intake manifold (M8) 19 Intake manifold (M10) 35 Exhaust manifold Engine hanger 12 Heat protector (Turbocharger side) 14 Oxygen sensor 54 Exhaust fitting bolt 59 Exhaust fitting nut 59 Air outlet fitting 19 11-7 ENGINE – Specifications Items Nm OIl return pipe (Turbocharger side) 9 Oil return pipe (Oil pan side – Head mark 7) 9 Oil return pipe (Oil pan side – Head mark 10) 13 Oil pipe 11 Oil pipe eye bolt (Cylinder head side) 16 Oil pipe eye bolt (Turbocharger side) 30 Water pipe 11 Water pipe eye bolt 41 Exhaust manifold (M8) 29 Exhaust manifold (M10) 49 Exhaust manifold (Turbocharger side) 59 Water pump and water hose Water temperature sensor 29 Water temperature gauge unit 11 Water inlet fitting 24 Water outlet fitting (M6) 10 Water outlet fitting (M8) 13 Thermostat housing 24 Thermostat housing (Clamp) 11 Water inlet pipe (Cylinder block) 13 Water inlet pipe (Outlet fitting) 10 Water pump 14 Knock sensor 22 Rocker arms and camshaft Camshaft position sensor 9 Camshaft position sensor cover 10 Camshaft position sensing cylinder 21 Camshaft position sensing support 13 Camshaft bearing cap 20 Oil delivery body 11 Cylinder head and valves Cylinder head bolt [Tighten to 78 Nm and then completely before tightening to final torque specification] 20 ! 90° + 90° 11-8 Items ENGINE – Specifications Nm Front case and oil pan Drain plug 39 Oil pan 7 Oil screen 19 Buffle plate 22 Oil pressure switch 10 Oil cooler by-pass valve 54 Relief plug 44 Plug 24 Front case 24 Oil pump cover (Screw) 10 Oil pump cover (Bolt) 16 Piston and connecting rods Connecting rod nut 20 + 90° to 94° Crankshaft and flywheel Flywheel bolt 132 Rear plate 11 Bell housing cover 9 Oil seal case 11 Beam bearing cap bolt 25 + 90° Check valve 32 Throttle body Throttle position sensor 3.5 Idle speed control body assembly 3.5 Turbocharger Waste gate actuator 11 11-9 ENGINE – Specifications NEW TIGHTENING METHOD – BY USE OF BOLTS TO BE TIGHTENED IN PLASTIC AREA A new type of bolts, to be tightened in plastic area, is currently used some parts of the engine. The tightening method for the bolts is different from the conventional one. Be sure to observe the method described in the text when tightening the bolts. Service limits are provided for the bolts. Make sure that the service limits described in the text are strictly observed. D D Areas where the bolts are in use: (1) Cylinder head bolts (2) Main bearing cap bolts (3) Connecting rod cap bolts Tightening method After tightening the bolts to the specified torque, tighten them another 90° or 180° (twice 90°). The tightening method varies on different areas. Observe the tightening method described in the text. SEALANTS Item Specified sealant Quantity Engine support bracket bolt 3MTM AAD Part No. 8672 or equivalent As required Semi-circular packing 3MTM AAD Part No. 8672 or equivalent As required Rocker cover 3MTM AAD Part No. 8672 or equivalent As required Oil return pipe gasket 3MTM AAD Part No. 8731 or equivalent As required Thermostat housing Mitsubishi Genuine Part No. MD970389 or equivalent As required Water outlet fitting Mitsubishi Genuine Part No. MD970389 or equivalent As required Engine coolant temperature gauge unit 3MTM AAD Part No. 8672 or equivalent As required Engine coolant temperature sensor 3MTM AAD Part No. 8731 or equivalent As required Cam position sensor support Mitsubishi Genuine Part No. MD970389 or equivalent As required Oil pressure switch 3MTM AAD Part No. 8672 or equivalent As required Oil pan Mitsubishi Genuine Part No. MD970389 or equivalent As required Oil seal case Mitsubishi Genuine Part No. MD970389 or equivalent As required 11-10 ENGINE – Specifications FORM-IN-PLACE GASKET The engine has several areas where the form-in-place gasket (FIPG) is in use. To ensure that the gasket fully serves its purpose, it is necessary to observe some precautions when applying the gasket. Bead size, continuity and location are of paramount importance. Too thin a bead could cause leaks. Too thick a bead, on the other hand, could be squeezed out of location, causing blocking or narrowing of the fluid feed line. To eliminate the possibility of leaks from a joint, therefore, it is absolutely necessary to apply the gasket evenly without a break, while observing the correct bead size. The FIPG used in the engine is a room temperature vulcanisation (RTV) type and is supplied in a 100-gram tube (Part No. MD970389). Since the RTV hardens as it reacts with the moisture in the atmospheric air, it is normally used in the metallic flange areas. The FIPG, Part No. MD970389, can be used for sealing both engine oil and coolant, while Part No. MD997110 can only be used for engine oil sealing. Disassembly The parts assembled with the FIPG can be easily disassembled without use of a special method. In some cases, however, the sealant between the joined surfaces may have to be broken by lightly striking with a mallet or similar tool. A flat and thin gasket scraper may be lightly hammered in between the joined surfaces. In this case, however, care must be taken to prevent damage to the joined surfaces. For removal of the oil pan, the special tool “Oil Pan Remover” (MD998727) is available. Be sure to use the special tool to remove the oil pan. Surface Preparation Thoroughly remove all substances deposited on the gasket application surfaces, using a gasket scraper or wire brush. Check to ensure that the surfaces to which the FIPG is to be applied is flat. Make sure that there are no oils, greases and foreign substances deposited on the application surfaces. Do not forget to remove the old sealant remained in the bolt holes. Form-in-Place Gasket Application When assembling parts with the FIPG, you must observe some precautions, but the procedures is very simple as in the case of a conventional precut gasket. Applied FIPG bead should be of the specified size and without breaks. Also be sure to encircle the bolt hole circumference with a completely continuous bead. The FIPG can be wiped away unless it is hardened. While the FIPG is still moist (in less than 15 minutes), mount the parts in position. When the parts are mounted, make sure that the gasket is applied to the required area only. In addition, do not apply any oil or water to the sealing locations or start the engine until a sufficient amount of time (about one hour) has passed after installation is completed. The FIPG application procedure may vary on different areas. Observe the procedure described in the text when applying the FIPG. ENGINE – Special Tools SPECIAL TOOLS Tool Number Name Use MD998781 Flywheel stopper Holding of flywheel and drive plate MD998778 Crankshaft sprocket puller Removal of crankshaft sprocket MD998719 Pulley holder pin Holding camshaft sprocket MB990767 Crankshaft pulley holder MD998785 Sprocket stopper Holding silent shaft sprocket MD998767 Tensioner puller socket wrench Adjustment of timing belt tension MD998738 Set screw MD998713 Camshaft oil seal installer Installation of camshaft oil seal MD998442 Lash adjuster wire Air bleeding of lash adjuster 11-11 11-12 Tool ENGINE – Special Tools Number Name Use MB991654 Cylinder head bolt wrench (12) Removal and installation of cylinder head bolt MD998772 Valve spring compressor Removal and installation of valve and related parts MD998735 Valve spring compressor MD998737 Valve stem seal installer Installation of valve stem seal MD998727 Oil pan remover Removal of oil pan MD998162 Plug wrench Removal and installation of front case cap plug Use with MD998783. MD998783 Plug wrench retainer Removal and installation of front case cap plug MD998371 Silent shaft bearing puller Removal of counterbalance shaft front bearing MD998372 Silent shaft bearing puller Removal of counterbalance shaft rear bearing ENGINE – Special Tools Tool 11-13 Number Name Use MB991603 Silent shaft bearing puller stopper Guide stopper for removal and installation of counterbalance shaft rear bearing Use with MD998372. MD998705 Silent shaft bearing installer Installation of counterbalance shaft front and rear bearing MD998375 Crankshaft front seal installer Installation of crankshaft front oil seal MD998285 Crankshaft front oil seal guide Guide for installation of crankshaft front oil seal Use with MD998375. MD998780 Piston setting tool Removal and installation of piston pin MB990938 Handle Installation of crankshaft rear oil seal MD998776 Crankshaft rear oil seal installer 11-14 ENGINE – Alternator and Ignition System ALTERNATOR AND IGNITION SYSTEM REMOVAL AND INSTALLATION 9 3 Nm 10 Nm 1 10 2 11 15 12 25 Nm 16 14 13 Nm 44 Nm 4 7 3 13 6 21 Nm 5 23 Nm 9 Nm 25 Nm Removal steps 1. Oil level gauge 2. O-ring 3. Oil level gauge guide 4. O-ring 5. Water pump pulley 6. Alternator brace 7. Alternator 8. Crankshaft pulley 8 9. 10. 11. 12. 13. 14. 15. 16. Center cover Spark plug cable Ignition coil Spark plug Breather hose PCV hose PCV valve PCV valve gasket 11-15 ENGINE – Timing Belt TIMING BELT REMOVAL AND INSTALLATION 11 Nm 23 7 1 26 8 22 49 Nm 24 2 24 Nm 25 9 30 11 Nm 11 Nm 13 3.5 Nm 24 Nm 14 27 31 118 Nm 9 Nm 49 Nm 3 4 30 Nm 6 18 19 45 Nm 29 5 19 Nm 32 28 21 88 Nm 15 48 Nm 10 AA" "LA "KA "JA AB" "IA AC" "HA AD" 11 16 12 20 17 49 Nm 9 Nm 54 Nm Removal steps 1. Timing belt front upper cover 2. Timing belt front center cover 3. Rubber plug 4. Timing belt front lower cover 5. Power steering pump bracket 6. Timing belt 7. Tensioner pulley 8. Tensioner arm 9. Auto tensioner 10. Idler pulley 11. Crank angle sensor 12. Oil pump sprocket 13. Crankshaft sprocket bolt 14. Crankshaft sprocket 15. Crankshaft sensing blade 16. Tensioner B AE" "GA 17. AF" "FA 18. "EA 19. AG" 20. 21. 22. "DA 23. 24. 25. "CA 26. "BA 27. AH" "AA 28. 29. 30. 31. 32. Timing belt B Counterbalance shaft sprocket Crankshaft spacer Crankshaft sprocket B Crankshaft key Oil filler cap Rocker cover Rocker cover gasket A Rocker cover gasket B Semi-circular packing Engine support bracket Camshaft sprocket bolt Camshaft sprocket Timing belt rear right cover Timing belt rear left upper cover Timing belt rear left lower cover 11-16 ENGINE – Timing Belt REMOVAL SERVICE POINTS AA" TIMING BELT REMOVAL (1) If the timing belt is to be reused, chalk an arrow mark on the back surface of the belt so that the belt can be reinstalled in the same direction. (2) Place the exhaust camshaft sprocket in a position where the timing mark for No. 1 cylinder is positioned about one tooth before the top dead center of the compression stroke. Timing mark Caution The camshaft sprocket on the exhaust side can turn very easily because of the valve spring tension. Use care not to allow your fingers to get caught by the sprocket. (3) Loosen the lock nut of the tensioner pulley, then remove the timing belt. AB" OIL PUMP SPROCKET REMOVAL (1) Remove the plug on the left side of cylinder block. (2) Insert a screwdriver (shank diameter 8 mm) to block the counterbalance shaft. (3) Remove the nut. (4) Remove the oil pump sprocket. AC" CRANKSHAFT BOLT LOOSENING (1) Hold the drive plate with the special tool as shown. (2) Remove the crankshaft bolt. AD" CRANKSHAFT SPROCKET REMOVAL If it is difficult to remove the sprocket, use the special tool. ENGINE – Timing Belt 11-17 AE" TIMING BELT “B” REMOVAL Make a mark on the back of the timing belt indicating the direction of rotation so it may be reassembled in the same direction if it is to be reused. 6EN1322 MD998785 NOTE (1) Water or oil on the belt shortens its life drastically, so the removed timing belt, sprocket, and tensioner must be free from oil and water. These parts should not be washed. Replace parts if seriously contaminated. (2) If there is oil or water on each part check front case oil seals, camshaft oil seal and water pump for leaks. AF" COUNTERBALANCE SHAFT SPROCKET REMOVAL (1) Set the special tool as shown to prevent the counterbalance shaft sprocket from turning together. (2) Loosen the bolt and remove the sprocket. AG" CRANKSHAFT SPROCKET “B” REMOVAL If it is difficult to remove the sprocket, use the special tool. AH" CAMSHAFT SPROCKET BOLT LOOSENING Use a wrench to hold the hexagonal part of the camshaft, and then remove the camshaft sprocket mounting bolt. INSTALLATION SERVICE POINTS "AA CAMSHAFT SPROCKET BOLT TIGHTENING Using a wrench, hold the camshaft at its hexagon and tighten the bolt to the specification. 11-18 ENGINE – Timing Belt "BA ENGINE SUPPORT BRACKET INSTALLATION Coat the bolts illustrated with sealant before tightening. Specified sealant: 3MTM AAD Part No. 8672 or equivalent "CA SEALANT APPLICATION TO SEMI-CIRCULAR PACKING Specified sealant: 3MTM AAD Part No. 8672 or equivalent 10 mm 10 mm Semicircular packing Cylinder head 11-19 ENGINE – Timing Belt "DA SEALANT APPLICATION TO ROCKER COVER Apply sealant to the areas indicated in the illustration. Specified sealant: 3MTM AAD Part No. 8672 or equivalent Apply sealant 10 mm 10 mm 10 mm Apply sealant 10 mm Apply sealant Apply sealant "EA SPACER INSTALLATION Install the spacer with the chamfered end toward the oil seal. Sharp edge Counterbalance shaft MD998785 "FA COUNTERBALANCE SHAFT SPROCKET INSTALLATION (1) Install the counterbalance shaft sprocket and screw the bolt. (2) Install special tool MD998785 as shown in the illustration to lock the counterbalance shaft. (3) Tighten the bolt, and then remove the special tool. 11-20 Timing marks (on front case) ENGINE – Timing Belt Timing marks "GA TIMING BELT “B” INSTALLATION (1) Align timing marks on the crankshaft sprocket “B” and counterbalance shaft sprocket with the marks on the front case respectively. (2) Install the timing belt “B” on the crankshaft sprocket “B” and counterbalance shaft sprocket. There should be no slack on the tension side. (3) Make sure that the relationship between the tensioner pulley center and the bolt center is as shown in the illustration. (4) Move the tensioner “B” in the direction of arrow while lifting with a finger to give a sufficient tension to the tension side of timing belt. In this condition, tighten bolt to secure tensioner “B”. When the bolt is tightened, use care to prevent shaft from turning together. If shaft is turned together, belt will be overtensioned. (5) Check to ensure that timing marks on sprockets and front case are in alignment. (6) Press with index finger the center of span on the tension side of timing belt “B”. The bolt must deflect 5 – 7 mm. "HA CRANKSHAFT BOLT TIGHTENING (1) Using the special tool, hold the flywheel or drive plate. (2) Install the crankshaft pulley in position. ENGINE – Timing Belt 11-21 "IA OIL PUMP SPROCKET INSTALLATION (1) Insert a Phillips screwdriver (shank diameter 8 mm shaft) through the plug hole on the left side of the cylinder block to block the left counterbalance shaft. (2) Install the oil pump sprocket. (3) Apply a proper amount of engine oil to the bearing surfaces of the nuts. (4) Tighten the nuts to the specified torque. 6EN0564 "JA AUTO TENSIONER INSTALLATION (1) If the auto tensioner rod is in its fully extended position, reset it as follows. (2) Clamp the auto-tensioner in the vise with soft jaws. (3) Push in the rod little by little with the vise until the set hole A in the rod is aligned with the hole B in the cylinder. A B (4) Insert a wire (1.4 mm in diameter) into the set holes. (5) Unclamp the auto tensioner from the vise. (6) Install the auto tensioner to front case and tighten to the specified torque. Caution Leave the wire installed in the auto tensioner. "KA TENSIONER PULLEY INSTALLATION Install the tensioner pulley in such direction that its two small holes are arranged vertically. Small holes 6EN1323 11-22 ENGINE – Timing Belt "LA TIMING BELT INSTALLATION (1) Place the exhaust side camshaft sprocket in a position where its timing mark is one tooth offset from the timing mark on the rocker cover in the counterclockwise direction. Timing mark NOTE Even if the timing marks on the sprocket and the rocker cover are brought into alignment, the exhaust camshaft is forced back by the valve spring tension. It is stabilized at a position one tooth before the timing mark. (2) Align the timing mark on the intake side camshaft sprocket with that on the rocker cover. Timing mark NOTE Even if the timing marks on the sprocket and the cover are brought into alignment, the intake camshaft is forced to turn one tooth in the clockwise direction by the valve spring tension and stabilized there. (3) Place the timing mark on the crankshaft sprocket one tooth this side from the mated timing mark as in the case of the camshaft sprocket. (4) Align the timing mark on oil pump sprocket with its mating mark. Oil pump sprocket timing marks 6EN1327 Plug Screwdriver 6EN1026 (5) Remove the plug on cylinder block and insert a Phillips screwdriver (shank diameter 8 mm) through the hole (Engine with counterbalance shafts). If it can be inserted as deep as 60 mm or more, the timing marks are correctly aligned. If the inserted depth is only 20 – 25 mm, turn the oil pump sprocket one turn and realign timing marks. Then check to ensure that the screwdriver can be inserted 60 mm or more. Keep the screwdriver inserted until installation of timing belt is finished. ENGINE – Timing Belt 11-23 (6) Remove the Phillips screwdriver. Place the oil pump sprocket in a position where its timing mark is one tooth offset from the mated timing mark in the counterclockwise direction. Timing mark 6EN1327 (7) Fit the timing belt over the exhaust side camshaft sprocket, and secure it at the illustrated position using a paper clip. (8) Turn the intake side camshaft sprocket as shown to a position where its timing mark is one tooth offset from the mated timing mark in the counterclockwise direction. Then, fit the timing belt over the sprocket and secure it with a paper clip. NOTE The intake camshaft will be turned a little clockwise by the valve spring tension and stabilized in position even if the belt is clipped at one tooth offset position. (9) Check to ensure that the timing marks on the intake camshaft sprocket side are in alignment when the exhaust camshaft sprocket is turned clockwise to align the timing marks. Timing mark NOTE The timing belt span between the intake and exhaust sprockets will have 17 cogs. (10)Fit the timing belt over the idler pulley, oil pump sprocket and crankshaft sprocket in this order. NOTE Be careful that the belt does not become slack. Crankshaft sprocket Oil pump sprocket 11-24 ENGINE – Timing Belt (11)Fit the timing belt over the tensioner pulley. NOTE When fitting the timing belt over the tensioner pulley, turn the intake side camshaft sprocket a little counterclockwise, as this will facilitate the work. Crankshaft sprocket MD998767 (12)Turn the crankshaft pulley a little in the illustrated direction to pull up the timing belt at the idler pulley side. (13)Check to ensure that the timing marks on the crankshaft sprocket, oil pump sprocket and exhaust camshaft sprocket are all offset one tooth from the corresponding timing marks in the counterclockwise direction. (14)Using the special tool, turn the tensioner pulley in the illustrated direction to strain the timing belt. Then, secure the tensioner temporarily by tightening the retaining bolt lightly. NOTE There must be no slack in the timing belt between the intake and exhaust camshafts. (15)Turn the crankshaft to align the timing mark with the mark for No. 1 cylinder top dead center in the compression stroke. MD998738 (16)Set the special tool as shown and screw it in up to the position where the wire inserted in the auto-tensioner when installing it can be moved lightly. ENGINE – Timing Belt 11-25 (17)Loosen the retaining bolt of the tensioner pulley. Caution Loosening the retaining bolt can cause the intake and exhaust camshafts to turn, resulting in slackened timing belt. Use care that the timing belt does not come off the sprockets at this time. MD998767 (18)Pull up the slack of the timing belt by turning the tensioner in illustrated direction using the special tool and a torque wrench (0 – 5 Nm). (19)From this position, turn back the tensioner until the torque wrench reading becomes 3.5 Nm, then secure it by tightening the retaining bolt. (20)Remove the special tool attached in step (16). (21)Rotate the crankshaft clockwise 2 turns. Then, leave it intact 15 minutes. (22)Check to see that the wire inserted when installing the auto-tensioner can be pulled out lightly. If it can be pulled out lightly, the timing belt is being tensioned properly. If so, remove the wire. In addition, check that the rod protrusion from the auto-tensioner meets the standard value, which is also an indication of properly tensioned timing belt. Standard value: 3.8 – 4.5 mm (23)If the wire cannot be removed with a light force, repeat steps (16) through (21) until the proper belt tensioner is obtained. INSPECTION TIMING BELT Replace belt if any of the following conditions exist. (1) Hardening of back rubber. Back side is glossy without resilience and leaves no indent when pressed with fingernail. (2) (3) (4) (5) Cracks Cracks Cracks Cracks on rubber back. or peeling of canvas. on rib root. on belt sides. 11-26 ENGINE – Timing Belt (6) Abnormal wear of belt sides. The sides are normal if they are sharp as if cut by a knife. (7) Abnormal wear on teeth. (8) Missing tooth. 12 mm AUTO TENSIONER (1) Check the auto tensioner for possible leaks and replace as necessary. (2) Check the rod end for wear or damage and replace as necessary. (3) Measure the rod protrusion. If it is out of specification, replace the auto tensioner. Standard value: 12 mm (4) Press the rod with a force of 98 to 196 N and measure its protrusion. (5) If the measured value is 1 mm or more shorter than the value obtained in step (3), replace the auto tensioner. 98 to 196 N Movement 11-27 ENGINE – Fuel and Emission Control Parts FUEL AND EMISSION CONTROL PARTS REMOVAL AND INSTALLATION 11 Nm 11 11 Nm 3 1 18 Nm 12 9 10 9 Nm 8 6 5 4 14 7 2 15 16 9 Nm 13 Removal steps 1. Throttle body "CA 2. Throttle body gasket 3. Fuel return pipe "BA 4. Fuel pressure regulator 5. O-ring 6. Insulator 7. Insulator "AA 8. Injector 9. 10. 11. 12. 13. 14. 15. 16. O-ring Grommet Delivery pipe Vacuum hose and vacuum pipe Vacuum tank Vacuum tank bracket Solenoid valve Solenoid valve bracket 11-28 ENGINE – Fuel and Emission Control Parts INSTALLATION SERVICE POINTS "AA INJECTORS INSTALLATION (1) Before installing an injector, the rubber O-ring must be lubricated with a drop of clean engine oil to aid in installation. (2) Install injector top end. Be careful not to damage O-ring during installation. Grommet O-ring 1EN0388 "BA FUEL PRESSURE REGULATOR INSTALLATION (1) Apply a small amount of new engine oil to the O-ring. Insert the fuel pressure regulator into the delivery pipe being careful not to damage the O-ring. Caution Be sure not to let engine oil get into the delivery pipe. (2) Check that the fuel pressure regulator turns smoothly. If it does not turn smoothly, the O-ring may be trapped. Remove the fuel pressure regulator and check the O-ring for damage, and then re-insert it into the delivery pipe and check once again. Projection "CA GASKET INSTALLATION Position the projection as shown in the illustration. 11-29 ENGINE – Secondary Air System and Intake Manifold SECONDARY AIR SYSTEM AND INTAKE MANIFOLD REMOVAL AND INSTALLATION 5 21 Nm 4 21 Nm 24 Nm 6 11 Nm 35 Nm 3 24 Nm 2 7 10 11 Nm 49 Nm 13 Nm 35 Nm 35 Nm 1 19 Nm 9 11 8 30 Nm Removal steps 1. Exhaust manifold heat protector 2. Vacuum hose and vacuum pipe "BA 3. Air pipe assembly 4. Air control valve gasket 5. Air control valve assembly 6. Engine hanger "AA 7. 8. 9. 10. 11. Air control valve bracket Intake manifold stay Alternator brace stay Intake manifold Intake manifold gasket 11-30 ENGINE – Secondary Air System and Intake Manifold INSTALLATION SERVICE POINTS (1) (2) "AA AIR CONTROL VALVE BRACKET INSTALLATION (1) Attach the air control valve bracket and the engine hanger to the intake manifold using bolts and nuts with which the intake manifold is also installed to the engine. (2) Tighten the bolts and nuts to the specified torque in the sequence given in the illustration. (3) (3) (4) (2) (1) "BA AIR PIPE ASSEMBLY INSTALLATION (1) Install the air pipe assembly to the exhaust manifold and to the air control valve and secure it provisionally by tightening the fasteners handtight. (2) Tighten the fasteners to the specified torque in the sequence given in the illustration. 11-31 ENGINE – Exhaust Manifold EXHAUST MANIFOLD REMOVAL AND INSTALLATION 16 Nm 19 59 Nm 1 18 12 Nm 11 Nm 29 Nm 30 Nm 14 15 49 Nm 10 Nm 13 41 Nm 12 4 16 10 Nm 5 59 Nm 14 Nm 59 Nm 11 17 41 Nm 8 7 3 2 54 Nm 19 Nm 10 9 9 Nm 6 Head mark 7: 9 Nm Head mark 10: 13 Nm Removal steps 1. Engine hanger 2. Turbocharger heat protector 3. Oxygen sensor 4. Exhaust fitting 5. Exhaust fitting gasket 6. Air outlet fitting "CA 7. Air outlet fitting gasket 8. Oil return pipe "BA 9. Gasket "BA 10. Oil return pipe gasket (Oil pan side) 11. Oil return pipe gasket (Turbocharger side) 12. Turbocharger assembly 13. Turbocharger gasket 14. Oil pipe 15. Water pipe 16. Water pipe 17. Turbocharger "AA 18. Exhaust manifold 19. Exhaust manifold gasket 11-32 ENGINE – Exhaust Manifold INSTALLATION SERVICE POINTS 3 1 4 7 5 9 "AA EXHAUST MANIFOLD INSTALLATION Tighten the exhaust manifold mounting nuts to the specified torque in the sequence given in the illustration. 6 8 2 Timing belt side Oil pan Silicon print "BA GASKET / OIL RETURN GASKET INSTALLATION EVOLUTION IV AND V Install the gasket with the silicon-printed side toward the oil pan and with the tabbed end directed as shown. Oil return pipe gasket EVOLUTION VI (1) Install the gasket with the tabbed end directed as shown. Timing belt side Oil pan Oil return pipe gasket Oil pan Oil return pipe (2) Apply sealant to both sides of the oil return pipe gasket and leave it for 20 minutes to dry before installing. Tighten the mounting bolts to the specified torque. Specified sealant: 3MTM AAD Part No. 8731 or equivalent Gasket NOTE If mounting bolts with head mark 7 have been used, be sure to replace them with bolts having head mark 10. ENGINE – Exhaust Manifold 11-33 "CA GASKET INSTALLATION Position the projection as shown in the illustration. Projection 11-34 ENGINE – Water Pump and Water Hose WATER PUMP AND WATER HOSE REMOVAL AND INSTALLATION <EVOLUTION VI> 11 1 10 Nm 2 4 8 13 Nm 7 9.8 Nm 24 Nm 11 Nm 12 13 29 Nm 24 Nm 5 6 11 Nm 9 10 16 22 Nm 15 14 14 Nm Removal steps 1. Water hose 2. Water hose 3. Water hose 4. Water hose "EA 5. Water temperature sensor "DA 6. Water temperature gauge unit 7. Thermostat 8. Water outlet fitting 9. 10. "AA 11. "AA 12. "AA 13. 14. 15. 16. Thermostat housing Thermostat housing gasket O-ring Water inlet pipe O-ring Water pump Water pump gasket Knock sensor 3 11-35 ENGINE – Water Pump and Water Hose REMOVAL AND INSTALLATION <EVOLUTION IV or V> 13 Nm 24 Nm 13 Nm 11 8 1 24 Nm 9 4 12 7 6 2 10 11 Nm 5 13 29 Nm 16 22 Nm 15 14 Nm 14 Removal steps 1. Water hose 2. Water hose 3. Water hose 4. Water hose "EA 5. Water temperature sensor "DA 6. Water temperature gauge unit 7. Water inlet fitting 8. Thermostat "CA "BA "AA "AA "AA 9. 10. 11. 12. 13. 14. 15. 16. Water outlet fitting Thermostat housing O-ring Water inlet pipe O-ring Water pump Water pump gasket Knock sensor 3 11-36 ENGINE – Water Pump and Water Hose INSTALLATION SERVICE POINTS Water pipe "AA WATER PIPE / O-RING INSTALLATION Wet the O-ring (with water) to facilitate assembly. Caution Keep the O-ring free of oil or grease. O-ring 6EN0594 "BA THERMOSTAT HOUSING INSTALLATION Apply 3 mm diameter of form-in-place gasket (FIPG) to the location shown in the illustration. Specified sealant: Mitsubishi Genuine Part No. MD970389 or equivalent "CA WATER OUTLET FITTING INSTALLATION Apply 3 mm diameter of form-in-place gasket (FIPG) to the location shown in the illustration. Specified sealant: Mitsubishi Genuine Part No. MD970389 or equivalent "DA SEALANT APPLICATION TO ENGINE COOLANT TEMPERATURE GAUGE UNIT (1) When reusing the gauge unit, clean its thread. (2) Apply the specified sealant to the thread. Specified sealant: 3MTM AAD Part No. 8672 or equivalent 9EN0092 "EA SEALANT APPLICATION TO ENGINE COOLANT TEMPERATURE SENSOR (1) When reusing the sensor, clean its thread. (2) Apply the specified sealant to the thread. Specified sealant: 3MTM AAD Part No. 8731 or equivalent 9EN0091 11-37 ENGINE – Rocker Arms and Camshaft ROCKER ARMS AND CAMSHAFT REMOVAL AND INSTALLATION 8 11 20 Nm 3 21 Nm 4 14 13 10 Nm 9 6 12 13 Nm 2 1 10 5 15 9 Nm 11 Nm 7 18 16 17 Apply engine oil to all moving parts before installation. "FA "EA "DA "CA "CA Removal steps 1. Cam position sensor 2. O-ring 3. Cam position sensor support cover 4. Cam position sensor support gasket 5. Cam position sensing cylinder 6. Cam position sensor support 7. Camshaft oil seal 8. Camshaft bearing cap rear right 9. Camshaft bearing cap rear left "CA "CA "CA "CA "CA "BA 10. 11. 12. 13. 14. 15. 16. "AA 17. 18. Camshaft bearing Camshaft bearing Camshaft bearing Camshaft bearing Camshaft bearing Camshaft Rocker arm Lash adjuster Oil delivery body cap cap cap cap cap front No. 5 No. 2 No. 3 No. 4 11-38 ENGINE – Rocker Arms and Camshaft INSTALLATION SERVICE POINTS "AA LASH ADJUSTER INSTALLATION Caution If the lash adjuster is re-used, clean the lash adjuster. Fit the lash adjuster onto rocker arm without allowing diesel fuel to spill out. Camshaft sprocket side Slit "BA CAMSHAFT INSTALLATION (1) Apply engine oil to the journals and cams of the camshafts. Install the camshafts on the cylinder head. Use care not to confuse the intake camshaft with the exhaust one. The intake camshaft has a slit on its rear end for driving the crankshaft position sensor. Intake side camshaft Dowel pin Cam number Symbol identifying intake or exhaust Timing belt side (2) Install the crankshaft sprocket B or spacer and flange to one end of the crankshaft, and turn the crankshaft until the timing marks are lined up, setting No. 1 cylinder to the TDC. (3) Set the camshafts so that their dowel pins are positioned at top. "CA BEARING CAP INSTALLATION (1) According to the identification mark stamped on the top of each bearing cap, install the caps to the cylinder head. Only “L” or “R” is stamped on front bearing cap. Cap No. is stamped on No. 2 to No. 5 bearing caps. Rear bearing cap has no stamping. I: For intake camshaft side E: For exhaust camshaft side (2) Tighten the bearing caps in the order shown two to three times by torquing progressively. Tighten to the specification in the final sequence. (3) Check to ensure that the rocker arm is positioned correctly on the lash adjuster and valve stem end. 11-39 ENGINE – Rocker Arms and Camshaft "DA CAMSHAFT OIL SEAL INSTALLATION (1) Apply engine oil to lib area of the oil seal and the front end outside diameter of the camshaft. (2) Using special tool install the camshaft oil seals. MD998713 "EA CAMSHAFT POSITION SENSOR SUPPORT INSTALLATION Apply 3 mm diameter of form-in-place gasket (FIPG) to the location shown in the illustration. Specified sealant: Mitsubishi Genuine Part No. MD970389 or equivalent "FA CAMSHAFT POSITION SENSING CYLINDER INSTALLATION (1) Set the No. 1 cylinder to the compression top dead center position (so that dowel pin of the exhaust camshaft is at the top). (2) Install the camshaft position sensing cylinder so that the white paint mark is facing in the direction shown in the illustration. Paint mark Camshaft position sensor INSPECTION CAMSHAFT Measure the cam height. Roller Tip Item Standard value mm Limit mm Intake 35.79 35.29 Exhaust 35.49 34.99 ROCKER ARM (1) Check the roller surface. If any dents, damage or seizure is evident, replace the rocker arm. (2) Check rotation of the roller. If it does not rotate smoothly or if looseness is evident, replace the rocker arm. (3) Check the inside diameter. If damage or seizure is evident, replace the rocker arm. 11-40 ENGINE – Rocker Arms and Camshaft LASH ADJUSTER Caution (1) The lash adjusters are precision-engineered mechanisms. Do not allow them to become contaminated by dirt or other foreign substances. (2) Do not attempt to disassemble the lash adjusters. (3) Use only fresh diesel fuel to clean the lash adjusters. Outside cleaning A Inside cleaning B Filling with diesel fuel (1) Prepare three containers and approximately five liters of diesel fuel. Into each container, pour enough diesel fuel to completely cover a lash adjuster when it is standing upright. Then, perform the following steps with each lash adjuster. C (2) Place the lash adjuster in container A and clean its outside surface. NOTE Use a nylon brush if deposits are hard to remove. Diesel fuel (3) While gently pushing down the internal steel ball using wire (0.5 mm in diameter) or special tool MD998442, move the plunger through 5 to 10 strokes until it slides smoothly. In addition to eliminating stiffness in the plunger, this operation will remove dirty oil. MD998442 Diesel fuel Caution The steel ball spring is extremely weak, so the lash adjuster’s functionality may be lost if the air bleed wire is pushed in hard. NOTE If the plunger remains stiff or the mechanism appears otherwise abnormal, replace the lash adjuster. ENGINE – Rocker Arms and Camshaft 11-41 (4) Removal the lash adjuster from the container. Then, push down the steel ball gently and push the plunger to eliminate diesel fuel from the pressure chamber. MD998442 Caution Make sure the oil hole in the side of the body is pointing toward container A. Do not point the oil hole at yourself or other people. Diesel fuel (5) Place the lash adjuster in container B. Then, gently push down the internal steel ball using wire (0.5 mm in diameter) or special tool MD998442 and move the plunger through 5 to 10 strokes until it slides smoothly. This operation will clean the lash adjuster’s pressure chamber. MD998442 Diesel fuel Caution The steel ball spring is extremely weak, so the lash adjuster’s functionality may be lost if the air bleed wire is pushed in hard. (6) Remove the lash adjuster from the container. Then, push down the steel ball gently and push the plunger to eliminate diesel fuel from the pressure chamber. MD998442 Caution Make sure the oil hole in the side of the body is pointing toward container A. Do not point the oil hole at yourself or other people. Diesel fuel (7) Place the lash adjuster in container C. Then, gently push down the internal steel ball using wire (0.5 mm in diameter) or special tool MD998442. MD998442 Diesel fuel Caution Do not use container C for cleaning. If cleaning is performed in container C, foreign matter could enter the pressure chamber when chamber is filled with diesel fuel. (8) Stand the lash adjuster with its plunger at the top, then push the plunger downward firmly until it moves through its greatest possible stroke. Return the plunger slowly, then release the steel ball and allow the pressure chamber to fill with diesel fuel. MD998442 Diesel fuel 11-42 ENGINE – Rocker Arms and Camshaft (9) Remove the lash adjuster from the container, then stand the lash adjuster with its plunger at the top. Push the plunger firmly and check that it does not move. Also, check that the lash adjuster’s height matches that of a new lash adjuster. NOTE If lash adjuster contracts, perform the operations (7) through (9) again to fill it with diesel fuel completely. Replace the lash adjuster if it still contracts after performing these steps. (10)Stand the lash adjuster upright to prevent diesel fuel from spilling out. Do not allow the lash adjuster to become contaminated by dirt or other foreign matter. Fit the lash adjuster onto the engine as soon as possible. 11-43 ENGINE – Cylinder Head and Valves CYLINDER HEAD AND VALVES REMOVAL AND INSTALLATION Apply engine oil to all moving parts before installation. 78 Nm → Loosen completely → 20 Nm + 90_ + 90_ 1 8 9 14 10 20 4 5 12 15 17 6 13 16 19 11 18 7 2 3 Removal steps AA" "DA 1. Cylinder head bolt 2. Cylinder head assembly 3. Cylinder head gasket AB" "CA 4. Retainer lock 5. Valve spring retainer "BA 6. Valve spring 7. Intake valve AB" "CA 8. Retainer lock 9. Valve spring retainer "BA 10. Valve spring AC" 11. "AA 12. 13. "AA 14. 15. 16. 17. 18. 19. 20. Exhaust valve Valve stem seal Valve spring seat Valve stem seal Valve spring seat Intake valve guide Exhaust valve guide Intake valve seat Exhaust valve seat Cylinder head 11-44 ENGINE – Cylinder Head and Valves REMOVAL SERVICE POINTS MB991654 PRECAUTION FOR REMOVED PARTS Keep removed parts in order according to the cylinder number and intake/exhaust. AA" CYLINDER HEAD BOLTS REMOVAL Using the special tool, loosen the cylinder head bolts. Loosen evenly, little by little. AB" RETAINER LOCK REMOVAL Store removed valves, springs and other parts, tagged to indicate their cylinder No. and location for reassembly. MD998772 MD998735 AC" VALVE HANDLING PRECAUTIONS (1) Sodium reacts violently with water or moisture generation heat and liberating hydrogen. It must be handled with utmost care because otherwise the following dangerous conditions may result: Loss of eyesight if sodium gets in eyes. Burns if soduim contact skin. Fire hazard. (2) Handling of Soduim-filled Exhaust Valves Soduim-filled exhaust valves are not dangerous and may be handled in the same way as ordinary valves unless they are broken. Never try to break the valves and expose soduim to the air. When worn exhaust valves are to be discarded, have them disposed of by a salvage company equipped with special disposal system, notifying them that the valves contain soduim. Should the exhaust valves be broken, neutralize soduim using the method described below, and discard the valves in the same way as ordinary valves. ENGINE – Cylinder Head and Valves 11-45 (3) How to Neutralize Sodium Place a container filled with more than 10 liters of water in a well ventilated large space. Wear rubber gloves and goggles, and carefully take out broken valves from the cylinder head. Put a broken valve in the water-filled container and quickly get away from the container at least 2 or 3 m. Caution 1. Valves must be neutralized one at a time. 2. Put a valve in the container only after soduim in the preceding one has completely reacted with water. Keep fire away from the container during the neutralization. The resulting hydrogen gas is highly explosive. When the reaction has finished (there is no more generation of hydrogen gas), take the valves out of the container with large tweezers or the like. NOTE The reaction occurs when water enters the cavity in the valve. Hydrogen gas may be trapped inside the valve, temporarily blocking the water passage. In such a case, wait until hydrogen gas in released and remaining soduim reacts with water. After the neutralization of soduim, water in the container contains soduim hydroxide and is highly alkaline. The water solution should be disposed of according to local regulations. Caution 1. Do not let the solution contact the eyes or the skin. 2. Should it get in the eyes, immediately flush them with clean water thoroughly, and receive medical attention. When it contacts the skin, wash with ample amounts of clean water. INSTALLATION SERVICE POINTS MD998737 "AA VALVE STEM SEAL INSTALLATION (1) Install the valve spring seat. (2) The special tool must be used to install the valve stem seal. Improper installation could result in oil leaks past the valve guide. Caution Do not reuse removed valve stem seals. 11-46 ENGINE – Cylinder Head and Valves "BA VALVE SPRING INSTALLATION Direct the valve spring end with identification color toward the spring retainer. "CA RETAINER LOCK INSTALLATION The valve spring, if excessively compressed, causes the bottom end of the retainer to be in contact with, and damage, the stem seal. MD998772 MD998735 "DA CYLINDER HEAD BOLT INSTALLATION (1) When installing the cylinder head bolts, check that the shank length of each bolt meets the limit. If the limit is exceeded, replace the bolt. Limit: Max. 99.4 mm (2) Apply engine oil to the bolt threads and to the washers. Shank length 6EN0782 Timing belt side (3) Using the special tool (MB991654) and according to the tightening sequence, tighten the bolts to the specified torque. Tightening torque: 78 Nm (4) Loosen all bolts fully. (5) Retighten the loosened bolts to a torque of 20 Nm in the specified tightening sequence. ENGINE – Cylinder Head and Valves 11-47 (6) Make paint marks on the cylinder head bolt heads and cylinder head. (7) Give a 90° turn to the cylinder head bolts in the specified tightening sequence. (8) Give another 90° turn to the cylinder head bolts and make sure that the paint mark on the head of each cylinder head bolt and that on the cylinder head are on the same straight line. 90° 90° Paint mark 6AE0297 Caution 1. If the bolt is turned less than 90°, proper fastening performance may not be expected. When tightening the bolt, therefore, be careful to give a sufficient turn to it. 2. If the bolt is overtightened, loosen the bolt completely and then retighten it by repeating the tightening procedure from step (1). INSPECTION CYLINDER HEAD (1) Check the cylinder head gasket surface for flatness by using a straightedge and thickness gauge. Standard value: 0.05 mm Limit: 0.2 mm (2) If the service limit is exceeded, correct to meet specification. 9EN0064 Grinding limit: *0.2 mm * Includes combined with cylinder block grinding. Cylinder head height (Specification when new): 131.9 – 132.1 mm 11-48 ENGINE – Cylinder Head and Valves VALVE (1) Check the valve face for correct contact. If incorrect, reface using a valve refacer. Valve seat contact should be maintained uniform at the center of valve face. (2) If the margin exceeds the service limit, replace the valve. Item Standard value mm Limit mm Intake 1.0 0.5 Exhaust 1.5 1.0 (3) Measure valve’s total length. If measurement is less than specified, replace the valve. Item Standard value mm Limit mm Intake 109.5 109.0 Exhaust 109.7 109.2 VALVE SPRING (1) Measure the free height of spring and, if it is smaller than the limit, replace. Out of square Free height Standard value mm Limit mm 48.3 47.3 (2) Measure the squareness of the spring and, if the limit is exceeded, replace. 1EN0264 Standard value Limit 1.5° 4° VALVE GUIDE Measure the clearance between the valve guide and valve stem. If the limit is exceeded, replace the valve guide or valve, or both. Valve guide Item Standard value mm Limit mm Intake 0.02 – 0.05 0.10 Exhaust 0.05 – 0.09 0.15 11-49 ENGINE – Cylinder Head and Valves Valve stem end Valve stem projection Spring seating surface VALVE SEAT Assemble the valve, then measure the valve stem projection between the end of the valve stem and the spring seating surface. If the measurement exceeds the specified limit, replace the valve seat. Item Standard value mm Limit mm Intake 49.20 49.70 Exhaust 48.40 48.90 DEN0212 VALVE SEAT RECONDITIONING PROCEDURE 0.9 – 1.3 mm 43.5° – 44° (1) Before correcting the valve seat, check for clearance between the valve guide and valve and, if necessary, replace the valve guide. (2) Using the seat grinder, correct to obtain the specified seat width and angle. (3) After correcting the valve seat, lap the valve and valve seat using lapping compound. Then, check the valve stem projection (refer to VALVE SEAT in INSPECTION). 6EN0491 VALVE SEAT REPLACEMENT PROCEDURE 0.5 – 1 mm (1) Cut the valve seat to be replaced from the inside to thin the wall thickness. Then, remove the valve seat. 0.5 – 1 mm (2) Rebore the valve seat hole in the cylinder head to a selected oversize valve seat diameter. Valve seat ring hole diameter Height of seat ring Item Intake Exhaust Oversize I.D. 1EN0275 Standard value mm 0.30 O.S. 35.30 – 35.33 0.60 O.S. 35.60 – 35.63 0.30 O.S. 33.30 – 33.33 0.60 O.S. 33.60 – 33.63 (3) Before fitting the valve seat, either heat the cylinder head up to approximately 250°C or cool the valve seat in liquid nitrogen, to prevent the cylinder head bore from galling. (4) Using a valve seat cutter, correct the valve seat to the specified width and angle. See “VALVE SEAT RECONDITIONING PROCEDURE”. 11-50 ENGINE – Cylinder Head and Valves VALVE GUIDE REPLACEMENT PROCEDURE (1) Force the valve guide out toward the cylinder block using a press. (2) Machine the valve guide hole in the cylinder head to the size of the oversize valve guide to be installed. Caution Do not use the valve guide of the same size as the removed one. Valve gauge hole diameters in cylinder head Item Standard value mm 0.05 O.S. 12.05 – 12.07 0.25 O.S. 12.25 – 12.27 0.50 O.S. 12.50 – 12.52 (3) Press-fit the valve guide until it protrude specified value 19.5 mm as shown in the illustration. Caution 1. Press the valve guide from the cylinder head top surface. 2. Valve guide for intake valve and that for exhaust valve are different in length. (45.5 mm for intake valve; 50.5 mm for exhaust valve) Protrusion 1EN0106 (4) After the valve guide has been installed, insert a new valve to check for smooth sliding motion. 11-51 ENGINE – Front Case, Counterbalance Shaft and Oil Pan FRONT CASE, COUNTERBALANCE SHAFT AND OIL PAN REMOVAL AND INSTALLATION 10 Nm Apply engine oil to all moving parts before installation. 29 31 8 28 20 30 24 Nm 10 Nm 7 25 54 Nm 21 15 27 22 Nm 9 19 16 Nm 14 6 24 18 16 13 12 11 18 Nm 17 24 Nm 26 23 36 Nm 5 19 Nm 19 Nm 4 24 Nm 10 44 Nm 22 2 39 Nm 1 7 Nm 3 Removal steps 1. Drain plug "NA 2. Drain plug gasket "MA 3. Oil filter AA" "LA 4. Oil pan 5. Oil screen 6. Oil screen gasket 7. Buffle plate "IA 8. Oil pressure switch 9. Oil cooler by-pass valve 10. Relief plug 11. Relief plug gasket 12. Relief spring 13. Relief plunger 14. Oil filter bracket 15. Oil filter bracket gasket AB" "KA 16. Plug 17. O-ring AC" "JA 18. Flange bolt "HA 19. Front case 20. Front case gasket 21. Oil pump cover "GA 22. Oil pump driven gear "GA 23. Oil pump drive gear "FA 24. Crankshaft oil seal "EA 25. Oil pump oil seal "DA 26. Counterbalance shaft oil seal 27. Counterbalance shaft left 28. Counterbalance shaft right AD" "CA 29. Counterbalance shaft front bearing AE" "BA 30. Counterbalance shaft rear bearing left AE" "AA 31. Counterbalance shaft rear bearing right 11-52 ENGINE – Front Case, Counterbalance Shaft and Oil Pan REMOVAL SERVICE POINTS MD998727 AA" OIL PAN REMOVAL (1) Remove all oil pan bolts. (2) Drive in the special tool between the cylinder block and oil pan. NOTE Never use a screwdriver or chisel, instead of the service tool, as a deformed oil pan flange will result in oil leakage. 6EN0698 MD998162 AB" PLUG REMOVAL (1) Fit special tool MD998162 on the plug, and then hold it in position with special tool MD998783. (2) Loosen the plug. (3) Remove the special tools MD998783 and MD998162 and then the plug. MD998783 AC" FLANGE BOLT REMOVAL (1) Remove the plug on the side of cylinder block. (2) Insert a Phillips screwdriver (shank diameter 8 mm) into the plug hole to lock the counterbalance shaft. Plug Screwdriver 6EN1026 (3) Loosen the flange bolt. 6EN0565 AD" COUNTERBALANCE SHAFT FRONT BEARING REMOVAL Using the special tool, remove the counterbalance shaft front bearing from the cylinder block. NOTE Be sure to remove the front bearing first. If it has not been removed, the Rear Bearing Puller cannot be used. ENGINE – Front Case, Counterbalance Shaft and Oil Pan 11-53 AE" COUNTERBALANCE SHAFT REAR BEARING REMOVAL Using the special tool, remove the left counterbalance shaft rear bearing from the cylinder block. MB991603 NOTE When removing the left counterbalance shaft rear bearing, install the special tool (MB991603) in front of the cylinder block. INSTALLATION SERVICE POINTS "AA RIGHT COUNTERBALANCE SHAFT REAR BEARING INSTALLATION (1) Apply engine oil to the outer surface of bearing. (2) Using special tools, install right rear bearing. Make sure that oil hole of bearing is aligned with oil hole of cylinder block. MD998705 6EN1034 "BA LEFT COUNTERBALANCE SHAFT REAR BEARING INSTALLATION (1) Install the special tool (Guide Plate) to the cylinder block. (2) Apply engine oil to the rear bearing outer circumference and bearing hole in the cylinder block. (3) Using the special tool, install the rear bearing. MB991603 NOTE The left rear bearing has no oil holes. Rear bearing MB991603 MD998705 6EN0557 11-54 ENGINE – Front Case, Counterbalance Shaft and Oil Pan "CA COUNTERBALANCE SHAFT FRONT BEARING INSTALLATION Using special tools, install front bearing. MD998705 MD998705 Bearing Cylinder block 6EN1035 "DA COUNTERBALANCE SHAFT OIL SEAL INSTALLATION Using a suitable socket wrench, install the counterbalance shaft oil seal into the front case. "EA OIL PUMP OIL SEAL INSTALLATION Using a suitable socket wrench, install the oil pump oil seal into the front case. "FA CRANKSHAFT FRONT OIL SEAL INSTALLATION Using the special tool, install the crankshaft front oil seal into the front case. ENGINE – Front Case, Counterbalance Shaft and Oil Pan 11-55 "GA OIL PUMP DRIVEN GEAR / OIL PUMP DRIVE GEAR INSTALLATION Apply engine oil amply to the gears and line up the alignment marks. "HA FRONT CASE ASSEMBLY INSTALLATION (1) Set the special tool on the front end of crankshaft and apply a thin coat of engine oil to the outer circumference of the special tool to install the front case. (2) Install the front case assembly through a new front case gasket and temporarily tighten the flange bolts (other than those for tightening the filter bracket). "IA SEALANT APPLICATION TO OIL PRESSURE SWITCH Coat the threads of switch with sealant and install the switch using the special tool. Specified sealant: 3MTM AAD Part No. 8672 or equivalent Caution (1) Keep the end of the thread portion clear or sealant. (2) Avoid an overtightening. "JA FLANGE BOLT INSTALLATION (1) Insert a Phillips screwdriver into a hole in the left side of the cylinder block to lock the silent shaft. 6EN0564 11-56 ENGINE – Front Case, Counterbalance Shaft and Oil Pan (2) Secure the oil pump driven gear onto the left counterbalance shaft by tightening the flange bolt to specified torque. MD998162 "KA PLUG INSTALLATION (1) Install a new O-ring to the groove of the front case. (2) Install the plug to the front case. (3) Fit the special tool MD998162 on the plug, and then hold it in position with special tool MD998783. (4) Tighten the plug to the specified torque. (5) Remove the special tools MD998783 and MD998162. MD998783 "LA OIL PAN INSTALLATION (1) Clean both mating surfaces of oil pan and cylinder block. (2) Apply a 4 mm wide bead of sealant to the entire circumference of the oil pan flange. Specified sealant: Mitsubishi Genuine equivalent Bolt hole portion Part No. MD970389 or Groove portion 6EN0213 NOTE 1. Be sure to install the oil pan quickly while the sealant is wet (within 15 minutes). 2. After installation, keep the sealed area away from the oil and coolant for approx. one hour. (3) Note the difference in bolt lengths at the location shown. ENGINE – Front Case, Counterbalance Shaft and Oil Pan Bracket side 11-57 "MAOIL FILTER INSTALLATION (1) Clean the installation surfaces of the filter bracket. (2) Apply engine oil to the O-ring of the oil filter. (3) Screw the oil filter in until the O-ring contacts the bracket. Then tighten 3/4 turn (tightening torque: 16 Nm). 6EN0591 "NA DRAIN PLUG GASKET INSTALLATION Caution Fitting the gasket in a wrong way will result in oil leakage. Drain plug Install the drain plug gasket in the direction shown. Gasket Oil pan Oil pan side INSPECTION FRONT CASE (1) Check oil holes for clogging and clean if necessary. (2) Check the left counterbalance shaft front bearing section for wear, damage and seizure. If there is anything wrong with the section, replace the front case. (3) Check the front case for cracks and other damage. Replace cracked or damaged front case. OIL SEAL (1) Check the oil seal lip for wear and damage. Replace oil seal if necessary. (2) Check the oil seal lip for deterioration. Replace oil seal if necessary. 11-58 ENGINE – Front Case, Counterbalance Shaft and Oil Pan COUNTERBALANCE SHAFT (1) Check oil holes for clogging. (2) Check journals for seizure, damage and contact with bearing. If there is anything wrong with the journal, replace the counterbalance shaft, bearing or front case assembly. OIL COOLER BY-PASS VALVE (ENGINE WITH AIR COOLING TYPE OIL COOLER) (1) Make sure that the valve moves smoothly. (2) Ensure that the dimension (L) measures the standard valve under normal temperature and humidity. Standard value (L): 34.5 mm Valve (3) The dimension must be the standard value when measured after the valve has been dipped in 100°C oil. Standard value (L): 40 mm or more OIL PUMP (1) Assemble the oil pump gear to the front case and rotate it to ensure smooth rotation with no looseness. (2) Ensure that there is no ridge wear on the contact surface between the front case and the gear surface of the oil pump cover. (3) Check the side clearance. Standard value: Drive gear Driven gear 0.08 – 0.14 mm 0.06 – 0.12 mm 11-59 ENGINE – Piston and Connecting Rod PISTON AND CONNECTING ROD REMOVAL AND INSTALLATION 6 7 8 Apply engine oil to all moving parts before installation. 4 10 12 9 11 5 3 2 20 Nm + 90_ to 94_ 1 "GA AA" "FA "EA "DA "CA Removal steps 1. Connecting rod nut 2. Connecting rod cap 3. Connecting rod bearing 4. Piston and connecting rod assembly 5. Connecting rod bearing 6. Piston ring No. 1 "CA 7. Piston ring No. 2 "BA 8. Oil ring AB" "AA 9. Piston pin 10. Piston 11. Connecting rod 12. Bolt 11-60 ENGINE – Piston and Connecting Rod REMOVAL SERVICE POINTS AA" CONNECTING ROD CAP REMOVAL (1) Mark the cylinder number on the side of the connecting rod big end for correct reassembly. (2) Keep the removed connecting rods, caps, and bearings in order according to the cylinder number. AB" PISTON PIN REMOVAL (1) Insert the special tool, Push Rod, into the piston from the side on which the front mark is stamped in the piston head, and attach the guide C to the push rod end. (2) Place the piston and connecting rod assembly on the special tool, Piston Pin Setting Base, with the front mark facing upward. (3) Using a press, remove the piston pin. NOTE Keep the disassembled pistons, piston pins and connecting rods in order according to the cylinder number. ENGINE – Piston and Connecting Rod 11-61 INSTALLATION SERVICE POINTS "AA PISTON PIN INSTALLATION (1) Measure the following dimensions of the piston, piston pin and connecting rod. A: Piston pin insertion hole length B: Distance between piston bosses C: Piston pin length D: Connecting rod small end width (2) Obtain dimension L (to be used later) from the above measurements by using by following formula. L = (A – C) – (B – D) 2 (3) Insert the special tool, Push Rod, into the piston pin and attach the guide A to the push rod end. (4) Assemble the connecting rod in the piston with their front marks facing the same direction. (5) Apply engine oil to the entire periphery of the piston pin. (6) Insert the piston pin, push rod and guide A assembly having assembled in step (3) from the guide A side into the piston pin hole on the front marked side. 3 mm + L (7) Screw the guide B into the guide A until the gap between both guides amounts to the value L obtained in step (2) plus 3 mm. (8) Place the piston and connecting rod assembly onto the piston setting base with the front marks directed upward. (9) Press-fit the piston pin using a press. If the press-fitting force required is less than the standard value, replace the piston and piston pin set or/and the connecting rod. Standard value: 7,350 – 17,200 N 11-62 ENGINE – Piston and Connecting Rod (10)Check that the piston moves smoothly Upper side rail Spacer Lower side rail 6EN1237 "BA OIL RING INSTALLATION (1) Fit the oil ring spacer into the piston ring groove. NOTE 1. The side rails and spacer may be installed in either direction. 2. New spacers and side rails are colored for identification of their sizes. Size Identification color Standard None 0.50 mm oversize Red 1.00 mm oversize Yellow (2) Install the upper side rail. To install the side rail, first fit one end of the rail into the piston groove, then press the remaining portion into position by finger. See illustration. Use of ring expander to expand the side rail end gap can break the side rail, unlike other piston rings. Side rail gap Caution Do not use piston ring expander when installing side rail. 1EN0269 (3) Install the lower side rail in the same procedure as described in step (2). (4) Make sure that the side rails move smoothly in either direction. 11-63 ENGINE – Piston and Connecting Rod "CA PISTON RING NO. 2 / PISTON RING NO. 1 INSTALLATION (1) Using piston ring expander, fit No. 2 and then No. 1 piston ring into position. NOTE 1. The ring end is provided with identification mark. Identification mark Identification mark Side mark No. 1 No. 2 Item Identification mark No. 1 ring 1R No. 2 ring 2R 2. Install piston rings with identification mark facing up, to the piston crown side. 3. Size marks on position rings are as follows. Size Size mark Standard None 0.50 mm oversize 50 1.00 mm oversize 100 9EN0524 "DA PISTON AND CONNECTING ROD ASSEMBLY INSTALLATION (1) Liberally coat engine oil on the circumference of the piston, piston ring, and oil ring. (2) Arrange the piston ring and oil ring gaps (side rail and spacer) as shown in the figure. (3) Rotate the crankshaft so that crank pin is on the center of cylinder bore. Timing belt side (4) Use suitable thread protectors on the connecting rod bolts before inserting piston and connecting rod assembly into the cylinder block. Care must be taken not to nick the crank pin. (5) Using a suitable piston ring compressor tool, install the piston and connecting rod assembly into the cylinder block. "EA CONNECTING ROD BEARINGS INSTALLATION When the bearing needs replacing, select and install a proper bearing by the following procedure. (1) Measure the crankshaft pin diameter and confirm its classification from the following table. In the case of a crankshaft supplied as a service part, identification colors of its pins are painted at the positions shown in the illustration. 11-64 ENGINE – Piston and Connecting Rod (2) The connecting rod bearing identification mark is stamped at the position shown in the illustration. Crankshaft pin Classification Identification mark Connecting rod bearing Identification mark Identification color O. D. mm Identification mark Thickness mm Production part Service part 1 None Yellow 44.995 – 45.000 0 1.483 – 1.487 2 None None 44.985 – 44.995 1 1.487 – 1.491 3 None White 44.980 – 44.985 2 1.491 – 1.495 Connecting rod I.D.: 48.000 – 48.015 mm (3) Select a proper bearing from the above table on the basic of the identification data confirmed under items (1) and (2). [Example] If the measured value of a crankshaft pin outer diameter is 44.996 mm, the pin is classified as “1” in the table. In case the crankshaft is also replaced by a spare part, check the identification colors of the pins painted on the new crankshaft. If the color is yellow, for example, the pin is classified as “1”. In the above cases, select the connection rod bearing having identification mark “0”. "FA CONNECTING ROD CAP INSTALLATION (1) Verifying the mark made during disassembly, install the bearing cap to the connecting rod. If the connecting rod is new with no index mark, make sure that the bearing locking notches come on the same side as shown. (2) Make sure that the connecting rod big end side clearance meets the specification. Standard value: 0.10 – 0.25 mm Limit: 0.4 mm ENGINE – Piston and Connecting Rod 11-65 "GA CONNECTING ROD CAP NUT INSTALLATION Caution If the cylinder head has been installed before installing the connecting rod cap nut, be sure to remove the spark plugs. Paint mark 90° to 94° Paint mark Nut Bolt 6AE0298 (1) Since the connecting rod cap bolts and nuts are torqued using the plastic area tightening method, the bolts should be examined BEFORE reuse. If the bolt threads are “necked down”, the bolt should be replaced. Necking can be checked by running a nut with fingers to the full length of the bolt threads. If the nut does not run down smoothly, the bolt should be replaced. (2) Before installation of each nut, apply engine oil to the thread portion and bearing surface of the nut. (3) Install each nut to the bolt and tighten it with fingers. Then tighten the nuts alternately to install the cap properly. (4) Tighten the nuts to a torque of 20 Nm. (5) Make a paint mark on the head of each nut. (6) Make a paint mark on the bolt end at the position 90° to 94° from the paint mark made on the nut in the direction of tightening the nut. (7) Give a 90° to 94° turn to the nut and make sure that the paint mark on the nut and that on the bolt are in alignment. Caution 1. If the nut is turned less than 90°, proper fastening performance may not be expected. When tightening the nut, therefore, be careful to give a sufficient turn to it. 2. If the nut is overtightened (exceeding 94°), loosen the nut completely and then retighten it by repeating the tightening procedure from step (1). INSPECTION PISTON RING (1) Check the piston ring for damage, excessive wear, and breakage and replace if defects are evident. If the piston has been replaced with a new one, the piston rings must also be replaced with new ones. (2) Check for the clearance between the piston ring and ring groove. If the limit is exceeded, replace the ring or piston, or both. Standard value: No. 1 ring 0.04 – 0.075 mm No. 2 ring 0.02 – 0.06 mm Limit: 0.1 mm 11-66 ENGINE – Piston and Connecting Rod (3) Install the piston ring into the cylinder bore. Force it down with a piston, its crown being in contact with the ring, to correctly position it at right angles to the cylinder wall. Then, measure the end gap with a feeler gauge. If the ring gap is excessive, replace the piston ring. Standard value: No. 1 ring 0.25 – 0.35 mm No. 2 ring 0.40 – 0.55 mm Oil ring 0.10 – 0.40 mm Limit: No. 1, No. 2 ring 0.8 mm Oil ring 1.0 mm CRANKSHAFT PIN OIL CLEARANCE (PLASTIC GAUGE METHOD) (1) Remove oil from the crankshaft pin and connecting rod bearing. (2) Cut the Plastigage to the same length as the width of the bearing and place it on the crankshaft pin in parallel with its axis. Plastigage (3) Install the connecting rod cap carefully and tighten the nuts to specified torque. (4) Carefully remove the connecting rod cap. (5) Measure the width of the Plastigage at its widest part by using a scale printed on the Plastigage package. Standard value: 0.03 – 0.05 mm Limit: 0.1 mm 11-67 ENGINE – Crankshaft and Flywheel CRANKSHAFT AND FLYWHEEL REMOVAL AND INSTALLATION 2 3 1 15 6 5 132 Nm 4 11 Nm 9 Nm 11 Nm 11 Nm 14 12 13 11 32 Nm 10 9 Apply engine oil to all moving parts before installation. 8 25 Nm + 90_ 7 "EA "DA "CA "CA Removal steps 1. Flywheel bolt 2. Flywheel 3. Rear plate 4. Bell housing cover 5. Oil seal case 6. Oil seal 7. Beam bearing cap bolt 8. Beam bearing cap "BA 9. 10. "BA 11. "AA 12. 13. 14. 15. Crankshaft bearing lower Crankshaft Crankshaft bearing upper Crankshaft thrust bearing Check valve Oil jet Cylinder block 11-68 ENGINE – Crankshaft and Flywheel INSTALLATION SERVICE POINTS "AA CRANKSHAFT THRUST BEARING INSTALLATION (1) Install the two thrust bearing in the number 3 bearing bore in the cylinder block. For easier installation, apply engine oil to the bearings; this will help hold them in position. (2) The thrust bearings must be installed with their groove side toward the crankshaft web. Groove Identification color of crankshaft journal Bearing bore size identification mark No. 1 No. 2 No. 3 No. 4 No. 5 Bearing bore identification mark Cylinder inner diameter size mark Bottom of cylinder block Rear face of cylinder block "BA CRANKSHAFT BEARING INSTALLATION (1) From the following table, select a bearing whose size is appropriate for the crankshaft journal outside diameter. 11-69 ENGINE – Crankshaft and Flywheel Crankshaft journal outside diameter Cylinder block bearing bore Crankshaft bearing Identification color Size mm Identification mark Identification mark or color Yellow 56.994 – 57.000 0 0 or Black 1 1 or Green 2 2 or Yellow 0 1 or Green 1 2 or Yellow 2 3 or None 0 2 or Yellow 1 3 or None 2 4 or Blue None 56.988 – 56.994 White 56.982 – 56.988 For example, if the crankshaft journal outside diameter ID color is “yellow” and cylinder block bearing bore ID mark is “1”, select a bearing whose ID mark is “1”. If there is no ID color paint on the crankshaft, measure the journal outside diameter and select a bearing appropriate for the measured value. Crankshaft bearing size identification mark or color Identification mark or color (2) Install the bearings having an oil groove to the cylinder block. (3) Install the bearings having no oil groove to the bearing cap. Groove Upper Lower "CA BEARING CAP / BEARING CAP BOLT INSTALLATION (1) Install the bearing caps so the arrow points to the timing belt side. (2) Before installing the bearing cap bolts, check that the shank length of each bolt meets the limit. If the limit is exceeded, replace the bolt. Limit: Max. 71.1 mm Shank length 9EN0477 (3) Apply engine oil to the threaded portion and bearing surface of the bolt. 11-70 ENGINE – Crankshaft and Flywheel (4) Tighten the bolts to 25 Nm in the specified tightening sequence. Arrow mark Paint mark Paint mark 90° 6AE0299 (5) Make a paint mark on the head of each bolt. (6) Make a paint mark on the bearing cap at the position 90° from the paint mark made on the bolt in the direction of tightening the bolt. (7) According to the specified tightening sequence, give a 90° turn to each bolt and make sure that the paint mark on the bolt and that on the cap are in alignment. Caution If the bolt is turned less than 90°, proper fastening performance may not be expected. When tightening the bolt, therefore, be careful to give a sufficient turn to it. (8) After installing the bearing caps, make sure that the crankshaft turns smoothly and the end play is correct. If the end play exceeds the limit, replace No. 3 crankshaft bearings. Standard value: 0.05 – 0.25 mm Limit: 0.4 mm "DA OIL SEAL INSTALLATION Using the special tool, knock the oil seal into the oil seal case. ENGINE – Crankshaft and Flywheel 11-71 "EA SEALANT APPLICATION TO OIL SEAL CASE Specified sealant: Mitsubishi Genuine Part No. MD970389 or equivalent NOTE (1) Be sure to install the case quickly while the sealant is wet (within 15 minutes). (2) After installation, keep the sealed area away from the oil and coolant for approx. one hour. INSPECTION Plastigage CRANKSHAFT OIL CLEARANCE (PLASTIGAGE METHOD) (1) Remove oil from the crankshaft journal and the crankshaft bearing. (2) Install the crankshaft. (3) Cut the Plastigage to the same length as the width of the bearing and place it on the journal in parallel with its axis. (4) Install the crankshaft bearing cap carefully and tighten the bolts to the specified torque. (5) Carefully remove the crankshaft bearing cap. (6) Measure the width of the Plastigage at its widest part by using a scale printed on the Plastigage package. Standard value: 0.02 – 0.04 mm Limit: 0.1 mm Plastigage CYLINDER BLOCK (1) Visually check for scratches, rust, and corrosion. Use also a flaw detecting agent for the check. If defects are evident, correct, or replace. (2) Using a straightedge and feeler gauge, check the block top surface for warpage. Make sure that the surface is free from gasket chips and other foreign matter. Standard value: 0.05 mm Limit: 0.1 mm (3) If the distortion is excessive, correct within the allowable limit or replace. Grinding limit: 0.2 mm Includes/combined with cylinder head grinding Cylinder block height (when new): 284 mm (4) Check cylinder walls for scratches and seizure. If defects are evident, correct (bored to oversize) or replace. 11-72 ENGINE – Crankshaft and Flywheel (5) Using cylinder gauge, measure the cylinder bore and cylindricity. If worn badly, correct cylinder to an oversize and replace piston and piston rings. Measure at the points shown in illustration. Standard value: Cylinder I.D. 85.00 – 85.03 mm Cylindricity 0.01 mm or less BORING CYLINDER (1) Oversize pistons to be used should be determined on the basis of the largest bore cylinder. Piston size identification Size Identification mark 0.50 O.S. 50 1.00 O.S. 100 NOTE Size mark is stamped on the piston top. (2) Measure outside diameter of piston to be used. Measure it in thrust direction as shown. (3) Based on the measured piston O.D. calculate boring finish dimension. Boring finish dimension = Piston O.D. + (clearance between piston O.D. and cylinder) – 0.02 mm (honing margin) (4) Bore all cylinders to the calculated boring finish dimension. Caution To prevent distortion that may result from temperature rise during honing, bore cylinders, working from No. 2, No. 4, No. 1 to No. 3. (5) Hone to final finish dimension (piston O.D. + clearance between piston O.D. and cylinder). (6) Check clearance between piston and cylinder. Clearance between piston and cylinder: 0.02 – 0.04 mm NOTE When boring cylinders, finish all of four cylinders to same oversize. Do not bore only one cylinder to an oversize. 11-73 ENGINE – Throttle Body THROTTLE BODY DISASSEMBLY AND REASSEMBLY 6 7 4 5 3.5 Nm 1 2 3 3.5 Nm Disassembly steps AA" "AA 1. Throttle position sensor (with builtin closed throttle position switch) 2. Idle speed control body assembly 3. O-ring AB" 4. Throttle body 5. Fixed SAS 6. Speed adjusting screw 8. O-ring NOTE 1. The fixed SAS and the speed adjusting screw are correctly adjusted at the factory and should not be removed. 2. If the fixed SAS should happen to have been removed, carry out fixed SAS adjustment. 3. If the speed adjusting screw should happen to have been removed, carry out speed adjusting screw adjustment. 11-74 ENGINE – Throttle Body DISASSEMBLY SERVICE POINTS AA" THROTTLE POSITION SENSOR AND IDLE AIR CONTROL MOTOR REMOVAL (1) Do not disassemble the sensor and motor. (2) Do not immerse solvent to clean the sensor and motor. Clean then with shop towel. AB" THROTTLE BODY REMOVAL (1) Do not remove the throttle body. (2) Check if the vacuum port or passage is clogged. Use compressed air to clean the vacuum passage. REASSEMBLY SERVICE POINT "AA THROTTLE POSITION SENSOR INSTALLATION (1) Install the throttle position sensor to the throttle body as shown in the diagram. Throttle position sensor (2) Turn throttle position sensor 90° clockwise to set it, and tighten screws. TPS power supply TPS output Earth Idle position switch (3) Check the continuity between terminal No. 3 (Idle throttle position switch) and No. 4 (Earth). Throttle valve condition Continuity Fully closed Conductive Fully open No conductive If there is no continuity with the throttle valve fully closed, turn the throttle position sensor counterclockwise, and then check again. 11-75 ENGINE – Turbocharger TURBOCHARGER DISASSEMBLY AND REASSEMBLY 7 8 6 5 3 4 11 Nm 2 1 Disassembly steps D Inspection of turbocharger waste gate actuator operation 1. Snap pin 2. Waste gate actuator "EA 3. Coupling "FA "DA 4. AA" "CA 5. AB" "BA 6. 7. "AA 8. Turbine housing Snap ring Turbine wheel assembly Compressor cover O-ring 11-76 ENGINE – Turbocharger DISASSEMBLY SERVICE POINTS AA" SNAP RING REMOVAL Lay the unit with the compressor cover side facing down and using snap ring pliers, remove the compressor cover attaching snap ring. Caution When removing the snap ring, hold it with fingers to prevent it from springing away. Snap ring AB" TURBINE WHEEL ASSEMBLY REMOVAL Remove the turbine wheel assembly, striking the circumference of the compressor cover with a plastic hammer. The turbine wheel assembly may be a little hard to remove due to an O-ring put on the outer circumference. Turbine wheel assembly CLEANING (1) Use a clean cleaning oil commercially available. Do not use corrosive cleaning oils as they could damage to some parts. (2) Use a plastic scraper or hard brush to clean aluminum parts. REASSEMBLY SERVICE POINTS "AA O-RING INSTALLATION Apply a light coat of engine oil to a new O-ring and fit in the turbine wheel assembly groove. O-ring Dowel pin hole Dowel pin Caution When installing the O-ring, use care not to damage it. A damaged O-ring causes oil leaks. "BA TURBINE WHEEL ASSEMBLY (1) Apply a light coat of engine oil to the periphery of the O-ring. (2) Install the turbine wheel assembly to the compressor cover in relation to the dowel pin. Caution Use care not to damage the blades of turbine wheel and compressor wheel. ENGINE – Turbocharger Snap ring Chamfered edge 11-77 "CA SNAP RING INSTALLATION Lay the assembly with the compressor cover facing down and fit the snap ring. Caution Fit the snap ring with its chamfered side facing up. Turbine wheel assembly Compressor cover "DA TURBINE HOUSING INSTALLATION Install the turbine housing in relation to the dowel pin. Caution Use care not to damage the blades of turbine wheel. Dowel pin Dowel pin hole "EA COUPLING INSTALLATION Install the coupling and tighten to the specified torque. Coupling "FA WASTE GATE ACTUATOR OPERATION CHECK Using a tester, apply a pressure of approx. 100.0 kPa to the actuator and make sure that the rod moves. Caution Do not apply a pressure of more than 113.3 kPa to the actuator. Otherwise, diaphragm may be damaged. Never attempt to adjust the waste gate valve. Traces of contact INSPECTION TURBINE HOUSING (1) Check the housing for traces of contact with the turbine wheel, cracks due to overheating, pitching, deformation and other damage. Replace with a new turbine housing if cracked. (2) Operate the waste gate valve lever manually to check that the gate can be operated and closed smoothly. 11-78 ENGINE – Turbocharger Oil passage Turbine wheel Compressor wheel Water passage COMPRESSOR COVER Check the compressor cover for traces of contact with the compressor wheel and other damage. TURBINE WHEEL ASSEMBLY (1) Check the turbine and compressor wheel blades for bend, burr, damage, corrosion and traces of contact on the back side and replace if defective. (2) Check the oil passage of the turbine wheel assembly for deposit and clogging. (3) In the case of water cooled type, check also the water passage for deposit and clogging. (4) Check the turbine wheel and compressor wheel for light and smooth turning. 11-79 ENGINE – Alternator ALTERNATOR DISASSEMBLY AND REASSEMBLY 1 4 3 5 6 7 2 12 10 9 8 14 13 11 AA" AB" Disassembly steps 1. Front bracket assembly 2. Alternator pulley "BA 3. Rotor 4. Rear bearing 5. Bearing retainer 6. Front bearing 7. Front bracket AC" 8. 9. AC" "AA 10. 11. 12. 13. 14. Stator Plate Regulator assembly Brush Slinger Rectifier Rear bracket 11-80 ENGINE – Alternator DISASSEMBLY SERVICE POINTS AA" FRONT BRACKET ASSEMBLY REMOVAL Insert a flat tip screwdrivers or the like in the clearance between the front bracket assembly and stator core, to pry open and separate the stator and front bracket. Caution Do not insert the screwdriver too far, or the stator coil gets damaged. AB" ALTERNATOR PULLEY REMOVAL Face pulley side upward, fix the rotor with a work bench and remove the pulley. Caution Use care not to damage the rotor. Soldered AC" STATOR / REGULATOR ASSEMBLY REMOVAL (1) Unsolder the stator with a soldering iron (180 to 250 W). Complete this work within four seconds not to transfer heat to the diode. (2) When removing rectifier from the regulator assembly, remove the soldered sections to rectifier. Caution 1. Use care to make sure that the heat of the soldering iron is not transmitted to the diodes for a long period. 2. Use care that no undue force is exerted to the lead wires of the diodes. REASSEMBLY SERVICE POINTS Wire "AA REGULATOR ASSEMBLY INSTALLATION After installing the regulator assembly, insert a wire into the hole provided on the rear bracket while pressing in the brush to fix the brush. NOTE The brush is fixed when a wire is inserted, making rotor installation easier. Rear bracket Brush Wire ENGINE – Alternator Wire 11-81 "BA ROTOR INSTALLATION After installing the rotor, remove the wire used to fix the brush. INSPECTION ROTOR CHECK (1) Check the continuity between the rotor coil slip rings, and replace the rotor if the resistance value is not at the standard value. Standard value: 3 – 5 Ω (2) Check the continuity between the slip ring and core, and if there is continuity, replace the rotor. STATOR CHECK (1) Check the continuity between the coil leads, and if there is continuity, replace the stator. (2) Check the continuity between the coil and core, and if there is continuity, replace the stator. 11-82 ENGINE – Alternator RECTIFIERS CHECK (1) Inspect the (+) heat sink by checking the continuity between the (+) heat sink and stator coil lead wire connection terminal using a tester probe. If there is a continuity at both, the diode is short circuited, so replace the rectifier. (2) Inspect the (–) heat sink by checking the continuity between the (–) heat sink and stator coil lead wire connection terminal using a tester probe. If there is a continuity at both, the diode is short circuited, so replace the rectifier. (3) Check the diode trio by connecting an ohmmeter to both ends of each diode and check the continuity of the three diodes. If there is a continuity at both ends, or if there is no continuity, the diode is damaged so replace the recitifier. BRUSH CHECK (1) Measure the length of the brush protrusion shown in the illustration, and replace the brush if the measured value is below the limit value. Protrusion length Limit: 2 mm or less Soldered (2) The brush can be removed if the solder of the brush lead wire is removed. (3) When installing a new brush, insert the brush into the holder as shown in the illustration, and then solder the lead wires. 11-83 ENGINE – Starter Motor STARTER MOTOR DISASSEMBLY AND REASSEMBLY 3 14 15 17 19 2 13 12 16 18 22 21 5 20 23 4 1 9 11 6 8 7 10 AA" AB" AB" Disassembly steps 1. Cover 2. Screw 3. Magnetic switch 4. Screw 5. Through 6. Rear bracket 7. Brush holder 8. Brush 9. Rear bearing 10. Armature 11. Yoke assembly 12. Ball 13. 14. 15. 16. 17. AC" "AA 18. AC" "AA 19. 20. 21. 22. 23. Packing A Packing B Plate Planetary gear Lever Snap ring Stop ring Overrunning clutch Internal gear Planetary gear holder Front bracket 11-84 Magnetic switch ENGINE – Starter Motor DISASSEMBLY SERVICE POINTS “S” terminal “B” terminal AA" MAGNETIC SWITCH REMOVAL Disconnect field coil wire from “M” terminal of magnetic switch. “M” terminal Field coil wire AB" ARMATURE / BALL REMOVAL Caution When removing the armature, take care not to lose the ball (which is used as a bearing) in the armature end. AC" SNAP RING / STOP RING REMOVAL (1) Press stop ring off snap ring with a suitable socket. Socket Stop ring Armature Pinion gear Overrunning clutch (2) Remove snap ring with snap ring pliers and then remove stop ring and overrunning clutch. Snap ring Snap ring pliers Pinion gear Overrunning clutch Armature STARTER MOTOR PARTS CLEANING (1) Do not immerse parts in cleaning solvent. Immersing the yoke and field coil assembly and/or armature will damage insulation. Wipe motor assembly with a cloth only. (2) Do not immerse drive unit in cleaning solvent. Overrunning clutch is pre-lubricated at the factory and solvent will wash lubrication from clutch. (3) The drive unit may be cleaned with a brush moistened with cleaning solvent and wiped dry with a cloth. ENGINE – Starter Motor 11-85 REASSEMBLY SERVICE POINTS "AA STOP RING / SNAP RING INSTALLATION Using a suitable pulling tool, pull overrunnig clutch stop ring over snap ring. Stop ring Stop ring Overrunning clutch Snap ring INSPECTION COMMUTATOR CHECK (1) Place the armature in a pair of “V” blocks and check the runout with a dial indicator. Standard value: 0.05 mm Limit: 0.1 mm (2) Measure the commutator outer diameter. Standard value: 32.0 mm Limit: 31.4 mm (3) Check the undercut depth between segments. Undercut Standard value: 0.5 mm Segment Mica Brush holder BRUSH HOLDER CHECK Check the continuity between brush holder plate and brush holder. If there is no continuity, the brush holder is in order. 11-86 ENGINE – Starter Motor OVERRUNING CLUTCH CHECK (1) While holding clutch housing, rotate the pinion. Drive pinion should rotate smoothly in one direction, but should not rotate in opposite direction. If clutch does not function properly, replace overrunnig clutch assembly. (2) Inspect pinion for wear or burrs. If pinion is worn or burred, replace overrunning clutch assembly. If pinion is damaged, also inspect ring gear for wear or burrs. Free Lock FRONT AND REAR BRACKET BUSHING CHECK Inspect bushing for wear or burrs. If bushing is worn or burred, replace front bracket assembly or rear bracket assembly. BRUSH AND SPRING REPLACEMENT (1) Brushes that are worn beyond wear limit line, or oil-soaked, should be replaced. (2) When replacing ground brush, slide the brush from brush holder by prying retaining spring back. Wear limit line Growler ARMATURE TEST ARMATURE COIL SHORT-CIRCUIT TEST (1) Place armature in a growler. (2) Hold a thin steel blade parallel and just above while rotating armature slowly in growler. A shorted armature will cause blade to vibrate and be attracted to the core. Replace shorted armature. ARMATURE COIL EARTH TEST Check the insulation between each commutator segment and armature coil core. If there is no continuity, the insulation is in order. ENGINE – Starter Motor 11-87 ARMATURE COIL OPEN-CIRCUIT INSPECTION Check the continuity between segments. If there is continuity, the coil is in order.