Rover 3.5, 3.9 and 4.2 Litre V8 Engine Overhaul Manual

Rover 3.5, 3.9 and 4.2 Litre V8 Engine Overhaul Manual

The Rover V8 Engine 3.5, 3.9 and 4.2 Litre is a powerful and reliable engine that has been used in a variety of vehicles. It is a water-cooled, eight-cylinder engine with a cast aluminium cylinder block and cylinder heads. The crankshaft is carried in five main bearings and is driven by an inverted tooth chain. The valves are operated by rockers, pushrods and hydraulic tappets.

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Rover V8 Engine 3.5, 3.9 and 4.2 Litre Overhaul Manual | Manualzz

V8

ENGINE

OVERHAUL

MANUAL

This overhaul manual is applicable to 3.5,

3.9 and 4.2 Litre V8 engines with or without suffix B added to the engine serial number.

Publication Part No. RCL

Published by Rover Technical Communication

1996 Rover Group Limited

INTRODUCTION

How to use this Manual

To assist in the use of this Manual the section title is given at the top and the relevant sub-section is given at the bottom of each page.

This manual contains procedures for overhaul of the

V8 engine on the bench with the gearbox, clutch, inlet manifold, exhaust manifolds, coolant pump, starter motor, alternator, and all other ancillary equipment removed. For information regarding

General Information, Adjustments, removal of oil seals, engine units and ancillary equipment, consult the Repair Manual.

Each major section starts with a contents page, listing the information contained in the relevant sub-sections. To assist filing of revised information each sub-section is numbered from page 1.

The individual overhaul items are to be followed in the sequence in which they appear. Items numbers in the illustrations are referred to in the text.

Overhaul operations include reference to Service tool numbers and the associated illustration depicts the tool. Where usage is not obvious the tool is shown in use. Land Rover tool numbers are quoted, for the equivalent Rover Cars tool number refer to the Service Tool section. Operations also include reference to wear limits, relevant data, and specialist information and useful assembly details.

WARNINGS, CAUTIONS and NOTES have the following meanings:

WARNING: Procedures which must be followed precisely to avoid the possibility of injury.

CAUTION: Calls attention to procedures which must be followed to avoid damage to components.

NOTE: Gives helpful information.

INTRODUCTION

References

With the engine and gearbox assembly removed, the crankshaft pulley end of the engine is referred to as the front. References to RH and LH banks of cylinders is taken viewing from the flywheel end of the engine.

Operations covered in this Manual do not include reference to testing the vehicle after repair. It is essential that work is inspected and tested after completion and if necessary a road test of the vehicle is carried out particularly where safety related items are concerned.

Dimensions

The dimensions quoted are to design engineering specification with Service limits where applicable.

INTRODUCTION

1

INTRODUCTION

REPAIRS AND REPLACEMENTS

When replacement parts are required it is essential that only Rover recommended parts are used.

Attention is particularly drawn to the following points concerning repairs and the fitting of replacement parts and accessories.

Torque wrench setting figures given in this Manual must be used. Locking devices, where specified, must be fitted. If the efficiency of a locking device is impaired during removal it must be renewed.

The terms of the vehicle warranty may be invalidated by the fitting of parts other than Rover

Group recommended parts. All Rover Group recommended parts have the full backing of the vehicle warranty.

Rover Group dealers are obliged to supply only

Rover Group recommended parts.

SPECIFICATION

Rover Group are constantly seeking to improve the specification, design and production of their vehicles and alterations take place accordingly. While every effort has been made to ensure the accuracy of this

Manual, it should not be regarded as an infallible guide to current specifications of any particular vehicle.

This Manual does not constitute an offer for sale of any particular component or vehicle. Rover Group dealers are not agents of Rover Group and have no authority to bind the manufacturer by any expressed or implied undertaking or representation.

2

INTRODUCTION

INFORMATION

DATA

Firing order

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1, 8, 4, 3, 6, 5, 7, 2

Cylinders 1, 3, 5, 7 - LH side of engine

Cylinders 2, 4, 6, 8 - RH side of engine

Valve springs

Free length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fitted length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Load at fitted length . . . . . . . . . . . . . . . . . . . . . . . . . .

48.30 mm

40.40 mm

339

±

10 N

Valves

Valve stem diameter:

Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Valve head diameter:

Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Valve installed height - maximum . . . . . . . . . . . . . . .

Valve stem to guide clearance:

Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.664 to 8.679 mm

8.651 to 8.666 mm

39.75 to 40.00 mm

34.226 to 34.480 mm

47.63 mm

0.025 to 0.066 mm

0.038 to 0.078 mm

Valve guides

Valve guide installed height . . . . . . . . . . . . . . . . . . . .

24.13 mm

Valve seats

Valve seat angle

Valve seat width

Valve face angle

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

460

°

15’

1.5 to 2.0 mm

45

°

Oil pump

Gear to body minimum clearance . . . . . . . . . . . . . . .

0.05 mm

Oil pressure relief valve

Spring free length . . . . . . . . . . . . . . . . . . . . . . . . . . .

81.28 mm

Oil pump - Engine No’s with suffix B

Inner to outer rotor clearance - maximum

Rotors to cover plate clearance - maximum

. . . . . . . . .

. . . . . . .

Drive gear wear step depth - maximum . . . . . . . . . . .

0.25 mm

0.1 mm

0.15 mm

Oil pressure relief valve - Engine No’s with suffix B

Spring free length . . . . . . . . . . . . . . . . . . . . . . . . . . .

60.0 mm

Camshaft

Maximum run-out . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.05 mm

GENERAL DATA

1

INFORMATION

Piston rings

Ring to groove clearance:

Top compression

2nd compression

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Ring fitted gap:

Top compression

2nd compression

Oil control rails

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil control ring width . . . . . . . . . . . . . . . . . . . . . . . . .

0.05 to 0.10 mm

0.05 to 0.10 mm

0.44 to 0.57 mm

0.44 to 0.57 mm

0.38 to 1.40 mm

3.00 mm, maximum

Pistons

Clearance in bore, measured at bottom of skirt at right angles to bore . . . . . . . . . . . . . . . . . . . .

0.018 to 0.033 mm

Gudgeon pins

Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clearance in piston . . . . . . . . . . . . . . . . . . . . . . . . . .

72.67 to 72.79 mm

22.215 to 22.220 mm

0.002 to 0.007 mm

Connecting rods

Length between centres . . . . . . . . . . . . . . . . . . . . . .

143.81 to 143.71 mm

Cylinder bore

Cylinder bore diameter:

3.5 engine

3.9 engine

4.2 engine

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

88.90 mm

94.00 mm

94.00 mm

Crankshaft

Main journal diameter . . . . . . . . . . . . . . . . . . . . . . . .

Minimum regrind diameter . . . . . . . . . . . . . . . . . . . .

Maximum out of round

Big-end journal diameter

. . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . .

Minimum regrind diameter

Maximum out of round

. . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . .

End-float . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

58.409 to 54.422 mm

57.393 to 57.406 mm

0.040 mm

50.800 to 50.812 mm

49.784 to 49.797 mm

0.040 mm

0.10 to 0.20 mm

Main bearings

Main bearing diametrical clearance

Undersizes

. . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.010 to 0.048 mm

0.254 mm, 0.508 mm

Big-end bearings

Big-end bearing diametrical clearance

Undersizes

. . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Endfloat on journal . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.015 to 0.055 mm

0.254 mm, 0.508 mm

0.15 to 0.36 mm

Flywheel

Flywheel minimum thickness . . . . . . . . . . . . . . . . . . .

39.93 mm

Drive plate

Drive plate setting height . . . . . . . . . . . . . . . . . . . . . .

8.08 to 8.20 mm

2

GENERAL DATA

INFORMATION

ENGINE

Crankshaft pulley bolt . . . . . . . . . . . . . . . . . . . . . . . .

Timing cover to cylinder block bolts ** . . . . . . . . . . . .

Camshaft gear bolt

Rocker cover bolts

. . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Rocker shaft to cylinder head bolts

Cylinder head bolts: *

. . . . . . . . . . . . . .

Outer row . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Centre row

Inner row

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cylinder head bolts - Engine No’s with suffix B: *

Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stage 2

Stage 3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lifting eye to cylinder head bolts

Connecting rod bolts

. . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . .

Main bearing cap bolts *** . . . . . . . . . . . . . . . . . . . . .

Rear main bearing cap bolts *** . . . . . . . . . . . . . . . . .

Flywheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Drive plate and ring gear assembly bolts . . . . . . . . . .

Drive plate adapter bolts

Oil sump drain plug

. . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

Oil sump bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil pressure relief plug . . . . . . . . . . . . . . . . . . . . . . . .

Oil pump cover to timing cover . . . . . . . . . . . . . . . . .

Oil pump cover plate screws - Engine No’s with suffix B **** . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil strainer bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Distributor clamp bolt

Spark plug

. . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Coolant pump/timing cover to cylinder block . . . . . . .

270 Nm

22 Nm

50 Nm

8 Nm

38 Nm

60 Nm

90 Nm

90 Nm

20 Nm

Then 90

°

Further 90

°

25 Nm

50 Nm

70 Nm

90 Nm

80 Nm

40 Nm

80 Nm

40 Nm

23 Nm

45 Nm

12 Nm

4 Nm

10 Nm

20 Nm

15 Nm

22 Nm

* Lightly oil threads prior to assembly.

** Coat first three threads with Loctite 242 prior to assembly.

*** Coat threads with lubricant EXP16A (Marston Lubricants) prior to assembly.

**** Coat threads with Loctite 222 prior to assembly.

TORQUE WRENCH SETTINGS

1

INFORMATION

GENERAL

For bolts and nuts not otherwise specified:

METRIC

M5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M6

M8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M10

M12

M14

M16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Nm

6 Nm

18 Nm

35 Nm

65 Nm

80 Nm

130 Nm

UNC / UNF

1/4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5/16

3/8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7/16

1/2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5/8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-10 Nm

25 Nm

40 Nm

75 Nm

90 Nm

135 Nm

2

TORQUE WRENCH SETTINGS

This page is intentionally left blank

ENGINE

DESCRIPTION AND OPERATION

1

ENGINE

2

DESCRIPTION AND OPERATION

CYLINDER BLOCK COMPONENTS

1. Cylinder block

2. Piston and gudgeon pin

3. Connecting rod

4. Core plugs

5. Camshaft

6. Dipstick

7. Camshaft key

8. Timing chain

9. Camshaft sprocket

10. Spacer

11. Distributor drive gear

12. Distributor

13. Oil pump gears *

14. Timing cover and gasket *

15. Timing cover oil seal *

16. Crankshaft pulley

17. Crankshaft sprocket

18. Woodruff key

19. Crankshaft

* Engine numbers without suffix B

** Engine numbers with suffix B

ENGINE

20. Centre main bearing shell - upper

21. Crankshaft rear oil seal

22. Rear main bearing cap and side seals

23. Connecting rod cap

24. Main bearing caps

25. Oil pump cover *

26. Oil pressure relief valve assembly *

27. Oil pressure switch *

28. Oil pump suction pipe and strainer

29. Sump

30. Drain plug

31. Timing cover **

32. Timing cover gasket **

33. Timing cover oil seal **

34. Oil filter **

35. Oil pressure switch **

36. Oil pressure relief valve assembly **

37. Camshaft thrust plate - if fitted

DESCRIPTION AND OPERATION

3

ENGINE

CYLINDER HEAD COMPONENTS

1. Cylinder head

2. Rocker cover

3. PCV filter

4. Rocker shaft

5. Tappet

6. Pushrod

7. Rocker shaft bracket

8. Rocker arm

9. Rocker shaft spring

10. PCV air intake filter

11. Engine oil filler cap

12. Inlet valve seal, spring, cap, and collets

13. Exhaust valve seal, spring, cap and collets

14. Inlet valve and seat

15. Exhaust valve and seat

16. Inlet manifold gasket and seals

17. Cylinder head gasket

18. Valve guide

4

DESCRIPTION AND OPERATION

ENGINE

Operation

The V8 engine is an eight cylinder, water cooled unit comprising of cast aluminium cylinder block and cylinder heads.

The two banks of steel cylinder liners which are pressed down to stops in the cylinder block, are set at 900 to each other. The crankshaft is carried in five main bearings, end-float being controlled by the thrust faces of the upper centre main bearing shell.

The centrally located camshaft is driven by the crankshaft via an inverted tooth chain. The valves are operated by rockers, pushrods and hydraulic tappets. Distributor drive is by skew gear from the front of the camshaft.

The aluminium alloy, pistons have two compression rings and an oil control ring and are secured to the connecting rods by semi-floating gudgeon pins. On later 4.2L engines the gudgeon pin is offset 0.5mm, identified by an arrow mark on the piston crown, which must always point to the front of the engine.

Plain, big-end bearing shells are fitted to each connecting rod.

DESCRIPTION AND OPERATION

5

ENGINE

Lubrication - Engine numbers without suffix B

1. Oil strainer

2. Crankshaft main bearing oil feed

3. Oil pressure relief valve

4. Oil pump

5. Main gallery

A Oil to cooler

B Oil from cooler

6

DESCRIPTION AND OPERATION

Lubrication - Engine numbers with suffix B

ENGINE

1. Oil strainer

2. Oil pump

3. Pressure relief valve

4. Oil pressure switch

Engine numbers without suffix B

The full flow lubrication system uses an external gear pump which is driven by the distributor drive shaft. The oil pump gears are housed in the timing cover and the oil pressure relief valve and warning light switch are fitted to the oil pump cover.

Engine numbers with suffix B

The full flow lubrication system uses a gear type oil pump driven from the crankshaft. The assembly is integral with the timing cover which also carries the full flow oil filter, oil pressure switch and pressure relief valve.

5. Main gallery

A Oil to cooler

B Oil from cooler

All engines

Oil is drawn from the pressed steel sump through a strainer and into the oil pump, excess pressure being relieved by the pressure relief valve. The oil pressure warning light switch is screwed into the oil pump cover and registers the oil pressure in the main oil gallery on the outflow side of the filter.

Pressurised oil passes through an oil cooler - if fitted to the full flow oil filter and to internal drillings in the crankshaft where it is directed to each main bearing and to the big end bearings via Nos. 1, 3 and 5 main bearings. An internal drilling in the cylinder block directs oil to the camshaft where it passes through further internal drillings to the hydraulic tappets, camshaft journals and rocker shaft. Lubrication to the thrust side of the cylinders is by oil grooves machined in each connecting rod big end joint face, which are timed to align with holes in the big end journals on the power and exhaust strokes.

DESCRIPTION AND OPERATION

7

ENGINE

Distributor drive and timing chain lubrication Hydraulic tappets

1. Bearing

2. Camshaft

3. Key

4. Camshaft timing chain sprocket

5. Spacer

6. Distributor drive gear

The distributor drive and timing chain are lubricated from the camshaft front bearing. The feed to the timing chain is channelled along the camshaft sprocket, key and spacer.

1. Clip

2. Pushrod seat

3. Inner sleeve

4. Upper chamber

5. Non-return ball valve

6. Spring

7. Outer sleeve

8. Lower chamber - high pressure

The purpose of the hydraulic tappet is to provide maintenance free and quiet operation of the inlet and exhaust valves. It achieves this by utilising engine oil pressure to eliminate the mechanical clearance between the rockers and the valve stems.

During normal operation, engine oil pressure present in the upper chamber passes through the non-return ball valve and into the lower, high pressure, chamber.

When the cam begins to lift the outer sleeve, the resistance of the valve spring felt through the push rod and seat causes the tappet inner sleeve to move downwards inside the outer sleeve. This downward movement of the inner sleeve closes the ball valve and increases the pressure in the lower, high pressure chamber, sufficiently to ensure that the push rod opens the valve fully.

As the tappet moves off the peak of the cam the ball valve opens to equalise the pressure in both chambers which ensures the valve closes when the tappet is on the back of the cam.

8

DESCRIPTION AND OPERATION

ENGINE

ROCKER SHAFTS

Rocker shaft - remove

1. LH rocker shaft only: Remove screw securing dipstick tube to rocker cover.

2. Remove 4 screws securing rocker cover to cylinder head.

NOTE: Mark position of 2 longer screws.

3. Remove rocker cover.

4. Remove and discard gasket from rocker cover.

5. Mark each rocker shaft in relation to original cylinder head.

CAUTION: Incorrect fitment of rocker shafts will lead to an oil feed restriction.

6. Progressively slacken and remove 4 bolts securing rocker shaft assembly to cylinder head.

7. Remove rocker shaft assembly.

8. Remove pushrods and store in fitted order.

OVERHAUL

1

ENGINE

Dismantle

1. Remove split pin from one end of rocker shaft.

2. Remove plain washer, wave washer, rocker arms, brackets and springs.

Inspect

1. Thoroughly clean components.

2. Inspect each component for wear, in particular rocker arms and shafts. Discard weak or broken springs.

3. Inspect pushrod seats in rocker arms.

4. Check pushrods for straightness and inspect ball ends for damage, replace as necessary.

Assembly

2. Fit new split pin to one end of rocker shaft.

3. Fit plain washer and wave washer.

4. Lubricate rocker arm bushes with clean engine oil.

5. Early type rocker arms are angled, and must be fitted with the valve end of the rocker arms angled away from each other as illustrated.

6. On later type rocker arms the valve end is offset and must be fitted as illustrated.

NOTE: Early and late rocker arms are interchangeable provided the complete set is changed.

7. Assemble rocker arms, brackets and springs to rocker shaft.

8. Compress springs, fit wave washer, plain washer and secure with new split pin.

1. Assemble rocker shafts with identification groove at one o’clock position with push rod end of rocker arm to the right.

CAUTION: If rocker shafts are incorrectly assembled and fitted to engine, oil supply to rocker arms will be restricted.

2

OVERHAUL

Rocker shaft - refit

1. Lubricate pushrods with engine oil.

2. Fit pushrods in removed order.

ENGINE

6. Apply a thin coating of Bostik 1775 or equivalent impact adhesive to mating surfaces of rocker cover and gasket.

7. Allow adhesive to cure, then fit gasket to rocker cover.

CAUTION: Gasket fits one way round only, it must be fitted accurately as subsequent movement will destroy bonding.

8. Fit rocker cover to cylinder head, fit screws and tighten to correct torque.

CAUTION: The 2 short screws must be fitted on side of cover nearest centre of engine.

9. LH rocker shaft only: Align dipstick tube to rocker cover, fit and tighten screw.

3. Fit each rocker shaft assembly, ensuring identification groove is uppermost and towards front of engine on RH side and towards rear of engine on LH side.

CAUTION: Incorrect fitment will result in an oil feed restriction.

4. Fit bolts and tighten to correct torque.

5. Clean gasket surface in rocker cover using

Bostik cleaner 6001 or equivalent, and allow to dry.

OVERHAUL

3

ENGINE

CYLINDER HEAD

Cylinder head - remove

1. Remove rocker shaft assembly.

2. Mark heads LH and RH for reassembly.

Engine numbers without suffix B

All engines

5. Release cylinder head from 2 dowels and remove cylinder head.

6. Remove and discard cylinder head gasket.

Valves and springs - remove

1. Remove spark plugs.

NOTE: RH cylinder head illustrated

3. Using sequence shown, remove 14 bolts securing cylinder head to cylinder block.

Engine numbers with suffix B

2. Using valve spring compressor LRT-12-034 or a suitable alternative, compress valve spring.

3. Remove 2 collets.

NOTE: RH cylinder head illustrated

4. Using sequence shown, remove and discard

10 bolts securing cylinder head to cylinder block.

NOTE: No bolts are fitted in the four lower holes in each cylinder head.

4. Release spring compressor and remove valve, valve spring cap and valve spring.

5. Repeat above operations for remaining valves.

CAUTION: Keep valves, springs, caps and collets in fitted order.

6. Remove and discard valve stem oil seals.

4

OVERHAUL

Valves, valve springs and guides - inspection

1. Clean cylinder head, valve springs, valves and valve guide bores.

2. Check existing valve stem and head diameters.

3. Check valve stem to guide clearance using new valves.

ENGINE

7. Check valve stem to guide clearance.

Valve stem to guide clearance D:

Inlet = 0.25 to 0.66 mm

Exhaust = 0.38 to 0.78 mm

8. Check condition of valve springs:

Free length = 48.30 mm

Fitted length = 40.40 mm

Load at fitted length = 339

±

10N

Load at valve open length = 736

±

22N

CAUTION: Valve springs must be replaced as a complete set.

Valve guide - renew

4. Renew valves and guides as necessary.

Valve head diameter A:

Inlet = 39.75 to 40.00 mm

Exhaust = 34.226 to 34.48 mm

Valve stem diameter B:

Inlet = 8.664 to 8.679 mm

Exhaust = 8.651 to 8.666 mm

5. Check installed height of each valve.

Valve installed height C= 47.63 mm

6. Renew valve/valve seat insert as necessary.

1. Using valve guide remover, LRT-12-037 press valve guide out from combustion chamber side of cylinder head.

NOTE: Service valve guides are 0.025mm

oversize on outside diameter to ensure interference fit.

2. Lubricate new valve guide with engine oil and place in position.

OVERHAUL

5

ENGINE

Valve seat insert - renew

NOTE: Service valve seat inserts are available 0.25 mm oversize on outside diameter to ensure interference fit.

3. Using LRT-12-038 partially press guide into cylinder head, remove tool.

4. Fit LRT-12-515 over valve guide and continue to press guide into cylinder head until tool contacts spring seat. Remove tool.

Valve guide installed height A = 24.13 mm

Valve seat insert - inspection

1. Check valve seat inserts for pitting, burning and wear. Replace inserts as necessary.

1. Grind a crescent in seat insert, until thin enough to break using a cold chisel.

CAUTION: Do not damage counterbore.

2. Heat cylinder head evenly to approximately

65

°

C.

3. Using a suitable mandrel, press new insert fully into counterbore.

4. Allow cylinder head to air cool.

6

OVERHAUL

ENGINE

Valve seats - renew

1. Check condition of valve seats and valves that are to be reused.

2. Remove carbon from valves and valve seats.

3. Reface valves as necessary. If a valve has to be ground to a knife-edge to obtain a true seat, fit a new valve.

Valve seating face angle A = 45

°

5. Ensure cutter blades are correctly fitted to cutter head with angled end of blade downwards, facing work, as illustrated. Check that cutter blades are adjusted so that middle of blade contacts area of material to be cut.

Use light pressure and remove only minimum of material necessary.

4. Cut valve seats using LRT-12-501 with

LRT-12-503 and LRT-12-504.

Valve seat:

Width A: Inlet = 37.03 mm

Exhaust = 31.50 mm

Width B = 1.5 - 2.00 mm

Angle C = 70

°

Angle D = 46

° ±

15’

Angle E = 20

°

OVERHAUL

7

ENGINE

Valves and springs - refit

1. Lap each valve to its seat using fine grinding paste.

2. Clean valve and seat.

Cylinder head - refit

1. Clean cylinder block faces using a suitable release agent and plastic scraper; ensure that bolt holes in cylinder block are clean and dry.

CAUTION: Do not use metal scraper or machined surfaces may be damaged.

2.

Engine numbers without suffix B: Thoroughly clean threads of cylinder head bolts.

CAUTION: Cylinder head bolts - Cylinder head bolts fitted to engines without suffix

B added to serial number are not interchangeable with those fitted to engines with suffix B added to serial number.

3. Coat valve seat with a small quantity of engineers blue, insert valve and press it into position several times without rotating. Remove valve and check for even and central seating.

Seating position shown by engineers blue should be in centre of valve face.

4. Check valve installed height if valve seats have been recut or new valves or valve seat inserts have been fitted.

Valve installed height A = 47.63 mm

5. Thoroughly clean cylinder head, blow out oilways and coolant passages.

6. Fit new valve stem oil seals, lubricate valve stems, fit valves, valve springs and caps, compress valve springs using LRT-12-034 and fit collets.

7. Using a wooden dowel and mallet, lightly tap each valve stem two or three times to seat valve cap and collets.

3. Fit cylinder head gasket with the word ’TOP’ uppermost.

NOTE: Gasket must be fitted dry.

CAUTION: Engines without suffix B have a steel gasket whilst engines with suffix B have a composite gasket. The two types of gasket are not interchangeable and it is essential to ensure that the correct type of gasket is fitted.

4. Carefully fit cylinder head and locate on dowels.

5. Lightly oil threads of cylinder head bolts.

8

OVERHAUL

Engine numbers without suffix B

ENGINE

9. Using sequence shown, tighten cylinder head bolts to:

Stage 1 - Correct torque

Stage 2 - 90

°

Stage 3 - Further 90

°

All engines

10. Fit rocker shaft assembly.

NOTE: RH cylinder head illustrated

6. Fit cylinder head bolts:

Long bolts: 1, 3 and 5.

Medium bolts: 2, 4, 6, 7, 8, 9, and 10.

Short bolts: 11, 12, 13 and 14.

7. Using sequence shown, progressively tighten cylinder head bolts to correct torque.

Engine numbers with suffix B

TIMING CHAIN AND GEARS

Distributor - remove

1. Remove distributor cap.

2. Rotate crankshaft until centre line of rotor arm is aligned with No. 1 spark plug segment in distributor cap and No. 1 piston is at TDC.

NOTE: RH cylinder head illustrated

8. Fit new cylinder head bolts:

Long bolts: 1, 3 and 5

Short bolts: 2, 4, 6,7, 8, 9 and 10

NOTE: There are no bolts fitted in the four lower holes in each cylinder head.

3. Scribe an alignment mark between distributor body and clamp.

4. Remove nut securing distributor clamp.

5. Remove distributor.

6. Remove clamp.

7. Remove and discard ’O’ ring from distributor.

OVERHAUL

9

ENGINE

Sump - remove Timing cover - remove - Engine numbers without suffix B

1. Remove crankshaft pulley bolt and collect spacer washer.

2. Remove crankshaft pulley.

1. Remove dipstick.

2. Remove screw securing dipstick tube to LH rocker cover.

3. Remove bolts and nut securing timing cover to cylinder block.

4. Release and remove timing cover.

5. Remove and discard gasket.

6. Remove and discard oil seal from timing cover.

3. Remove 16 bolts securing sump to cylinder block.

NOTE: Engine numbers with suffix B, 17 bolts are used to secure sump to cylinder block.

4. Carefully release sump from cylinder block.

CAUTION: Take care not to damage sealing faces of cylinder block and sump.

5. Remove sump.

10

OVERHAUL

Timing cover - remove - Engine numbers with suffix B

NOTE: Timing cover, oil pump and oil pressure relief valve are only supplied as an assembly.

1. Using assistance, restrain flywheel and remove crankshaft pulley bolt; collect spacer washer.

2. Remove crankshaft pulley.

ENGINE

Timing gears - remove

1. Restrain camshaft gear and remove bolt securing gear, collect washer.

2. Remove distributor drive gear and spacer.

3. Noting their fitted position, remove bolts securing timing cover to cylinder block; remove cover.

NOTE: Dowel located.

4. Remove oil pump drive gear.

5. Remove and discard gasket.

6. Remove and discard oil seal from timing cover.

3. Remove timing chain and gears as an assembly.

4. Collect Woodruff keys from camshaft and crankshaft.

Timing gears - inspection

1. Thoroughly clean all components.

2. Inspect distributor drive gear for wear.

3. Inspect timing chain links and pins for wear.

4. Inspect timing chain sprockets for wear. Renew parts as necessary.

OVERHAUL

11

ENGINE

Timing gears - refit

1. Clean gear locations on camshaft and crankshaft, fit Woodruff keys.

2. Check camshaft Woodruff key is fully engaged in keyway.

CAUTION: Space between Woodruff key and keyway acts as an oil feed. It is therefore most important that key is properly seated and parallel to axis of camshaft.

Overall dimension ’A’ must not exceed 30.15

mm.

6. Position timing gears on work surface with timing marks upwards and aligned.

7. Fit timing chain around gears, keeping timing marks aligned.

8. Fit gear and chain assembly.

NOTE: Timing marks and ’F’ mark on camshaft gear must be facing forwards.

3. Temporarily fit crankshaft gear, and if necessary turn crankshaft to bring timing mark on gear to the twelve o’clock position, remove gear.

4. Temporarily fit camshaft gear with marking ’F’ facing forwards.

5. Turn camshaft until mark on camshaft sprocket is at the six o’clock position, remove gear without moving camshaft.

9. Fit spacer to camshaft with flange facing forwards.

10. Fit distributor drive gear to camshaft with grooved face towards camshaft gear.

11. Fit camshaft gear bolt and washer, restrain camshaft gear and tighten bolt to correct torque.

12

OVERHAUL

Timing cover - refit - Engine numbers without suffix B

1. Clean sealant from threads of cover bolts.

2. Clean all traces of old gasket material from timing cover and mating face of cylinder block.

CAUTION: Use a plastic scraper.

3. Use a lint free cloth and thoroughly clean oil seal location in timing cover.

4. Lubricate new oil seal sealing surfaces with engine oil.

ENGINE

Timing cover - refit - Engine numbers with suffix

B

NOTE: Timing cover, oil pump and oil pressure relief valve are only supplied as an assembly.

1. Clean sealant from threads of timing cover bolts.

2. Clean all traces of gasket material from mating faces of timing cover and cylinder block.

CAUTION: Use a plastic scraper.

3. Clean oil seal location in timing cover.

4. Lubricate oil pump gears and oil seal recesss in timing cover with engine oil.

5. Apply Hylosil jointing compound to new timing cover gasket, position gasket to cylinder block.

6. Position oil pump drive gear in timing cover with groove towards front of timing cover.

5. Locate seal to timing cover and press seal in squarely until flush with front face of timing cover.

6. Position new gasket to cylinder block.

7. Coat threads of timing cover bolts with Loctite

242 sealant.

8. Fit timing cover, fit bolts and nut and tighten to correct torque.

9. Fit crankshaft pulley.

10. Fit spacer washer to pulley bolt, fit bolt and tighten to correct torque.

7. Locate tool LRT-12-090 on timing cover and oil pump drive gear.

8. Position timing cover to cylinder block and at the same time, rotate tool LRT-12-090 until drive gear keyway is aligned with Woodruff key.

9. Fit timing cover to cylinder block.

10. Smear threads of timing cover bolts with

Loctite 242 sealant, fit bolts and tighten progressively to the correct torque.

NOTE: Do not fit coolant pump bolts at this stage.

11. Remove tool LRT-12-090.

OVERHAUL

13

ENGINE

Distributor - refit

12. Lubricate new timing cover oil seal with engine oil.

13. Fit timing cover oil seal using tool LRT-12-089.

14. Fit crankshaft pulley, fit bolt and spacer washer; tighten bolt to correct torque.

Sump - refit

1. Remove all traces of old sealant from mating faces of cylinder block and sump.

1. Ensure timing pointer is aligned with 30 mark on crankshaft pulley and No.1 piston is on the compression stroke.

2. Engine numbers without suffix B: Position oil pump drive shaft tongue at the ten to four position.

3. Lubricate a new ’O’ ring with engine oil and fit to distributor.

2. Clean mating faces with suitable solvent and apply a 2 mm bead of Hylosil white silicone sealant to sump joint face as shown.

3. Fit sump, taking care not to damage sealant bead.

4. Fit sump bolts and working from the centre outwards, tighten progressively to correct torque.

5. Fit and tighten screw securing dipstick tube to

LH rocker cover.

6. Fit dipstick.

4. Turn distributor drive until rotor arm is approximately 30

° anti-clockwise from No.1

spark plug segment in distributor cap.

5. Insert distributor into timing cover, engage drive gear and push distributor down until ’O’ ring enters bore; position distributor clamp on stud.

14

OVERHAUL

6.

Engine numbers without suffix B: Locate slotted adaptor to oil pump drive shaft tongue.

7. Check that centre line of rotor arm is aligned with No.1 spark plug segment in distributor cap and reference marks on distributor body and clamp are aligned; reposition distributor if necessary.

8. Remove rotor arm.

9. Rotate distributor to position pick-up opposite nearest reluctor tooth.

ENGINE

OIL COOLER ADAPTER - ENGINE NUMBERS

WITHOUT SUFFIX B

Oil cooler adapter - remove

1. Remove oil filter element.

10. Fit distributor clamp nut ensuring that counterbored portion is towards clamp; tighten nut.

11. Fit rotor arm.

CAUTION: This distributor setting is to enable engine to be started. When engine is refitted, ignition timing must be set using electronic equipment.

2. Mark position of adapter in relation to oil pump cover.

3. Remove centre screw and withdraw adapter.

4. Remove and discard sealing ring.

Oil cooler adapter - refit

1. Thoroughly clean adapter.

2. Position new sealing ring, fit adapter, ensuring marks previously made line up, fit and tighten centre screw.

3. Lubricate sealing ring of oil filter with engine oil.

4. Screw filter on to filter head until it seats then tighten a further half-turn.

OVERHAUL

15

ENGINE

OIL PUMP - ENGINE NUMBERS WITHOUT

SUFFIX B

Oil pump - remove

1. Remove sump.

2. Remove distributor.

3. Remove timing cover.

4. Remove oil cooler adapter - if fitted.

Oil pump - inspection

1. Throughly clean oil pump gear housing, cover and gears.

2. Clean oil pressure relief valve bore in housing.

3. Clean relief valve filter screen.

4. Inspect pump gears for wear and scoring.

5. Remove oil pressure relief valve plug, discard sealing washer.

6. Withdraw pressure relief valve spring and valve.

5. Fit pump gears into housing.

6. Place straight edge across gears.

7. Check clearance between straight edge and housing face.

Gear to housing minimum clearance =

0.05mm.

If clearance is below minimum specified check gear recess in housing for wear. Renew housing if necessary.

8. Remove oil pump gears from housing.

9. Clean oil pressure relief valve and spring.

10. Inspect relief valve for wear and scoring.

11. Inspect relief valve spring for wear or signs of collapse.

Relief valve free length = 81.28 mm.

12. Check relief valve slides freely in its bore with no perceptible side movement.

7. Remove oil pressure switch, discard sealing washer.

8. Remove bolts securing oil pump cover.

9. Remove cover, remove and discard gasket.

10. Withdraw oil pump gears.

16

OVERHAUL

Oil pump - refit

1. Lubricate relief valve, spring, and bore in housing with clean engine oil.

2. Fit relief valve and valve spring.

3. Fit new sealing washer to plug, fit plug and tighten to correct torque.

4. Pack oil pump housing with Petroleum Jelly.

CAUTION: Use only Petroleum Jelly, no other grease is suitable.

5. Fit oil pump gears ensuring that Petroleum

Jelly is forced into every cavity between teeth of gears.

CAUTION: Unless pump is fully packed with Petroleum Jelly it may not prime itself when the engine is started.

6. Fit new pump cover gasket.

7. Position cover, fit bolts and tighten progressively to correct torque.

8. Fit oil cooler adapter.

9. Fit timing cover.

10. Fit distributor.

11. Fit sump.

ENGINE

OIL PUMP - ENGINE NUMBERS WITH SUFFIX B

CAUTION: Overhaul procedures for the oil pump and oil pressure relief valve are limited to carrying out dimensional checks. In the event of wear or damage being found, a replacement timing cover assembly must be fitted.

Oil pump - remove

1. Remove timing cover.

2. Remove oil pump drive gear.

3. Remove 9 screws securing cover plate, remove plate.

4. Make suitable alignment marks on inner and outer rotors, remove rotors.

OVERHAUL

17

ENGINE

Oil pressure relief valve - remove Oil pump - inspection

1. Thoroughly clean oil pump drive gear, cover plate, rotors and housing. Remove all traces of

Loctite from cover plate securing screws; ensure tapped holes in timing cover are clean and free from oil.

2. Check mating surfaces of cover plate, rotors and housing for scoring.

3. Assemble rotors and oil pump drive gear in housing ensuring that reference marks are aligned.

1. Remove circlip.

2. Remove relief valve plug, remove and discard

’O’ ring.

3. Remove relief valve spring and piston.

4. Using feeler gauges, check clearance between teeth of inner and outer rotors:

Maximum clearance = 0.25 mm

5. Remove oil pump drive gear, check depth of any wear steps on gear teeth:

Wear step maximum depth = 0.15 mm

18

OVERHAUL

6. Place a straight edge across housing.

7. Using feeler gauges, check clearance between straight edge and rotors:

Maximum clearance = 0.1 mm

Oil pressure relief valve - inspection

1. Clean relief valve components and piston bore in timing cover.

2. Check piston and bore for scoring and that piston slides freely in bore with no perceptible side movement.

3. Check relief valve spring for damage and distortion; check spring free length:

Spring free length = 60.0 mm

ENGINE

Oil pump - refit

1. Lubricate rotors, oil pump drive gear, cover plate and housing with engine oil.

2. Assemble rotors in housing ensuring that reference marks are aligned.

3. Position cover plate to housing.

4. Apply Loctite 222 to threads of cover plate screws, fit but do not fully tighten screws.

5. Position drive gear in oil pump, tighten cover plate screws to correct torque.

6. Fit timing cover.

Oil pressure relief valve - refit

1. Lubricate new ’O’ ring with engine oil and fit to relief valve plug.

2. Lubricate relief valve spring, piston and piston bore with engine oil.

3. Assemble piston to relief valve spring, insert piston and spring into piston bore.

4. Fit relief valve plug, depress plug and fit circlip.

5. Ensure circlip is fully seated in groove.

OVERHAUL

19

ENGINE

CAMSHAFT AND TAPPETS

Camshaft and tappets - remove

1. Remove rocker shaft assemblies.

2. Remove pushrods and store in fitted order.

3. Remove timing chain and gears.

4. Remove tappets and retain with their respective pushrods.

NOTE: If tappets cannot be removed due to damaged camshaft contact area, proceed as follows:

5. Lift tappets in pairs to the point where damaged face is about to enter tappet bore and fit rubber bands to retain tappets. Repeat until all tappets are retained clear of camshaft lobes. The tappets can then be withdrawn out the bottom of their bores when the sump is removed.

6. Withdraw camshaft, taking care not to damage bearings in cylinder block.

Camshaft and tappets - inspection

1. Throughly clean all components.

2. Inspect camshaft bearing journals and lobes for signs of wear, pitting, scoring and overheating.

3. Support camshaft front and rear bearings on vee blocks, and using a DTI, measure camshaft run-out on centre bearing.

Maximum permitted run-out = 0.05 mm.

4. Clean and inspect tappets. Check for an even, circular wear pattern on the camshaft contact area. If contact area is pitted or a square wear pattern has developed, tappet must be renewed.

5. Inspect tappet body for excessive wear or scoring. Replace tappet if scoring or deep wear patterns extend up to oil feed area. Clean and inspect tappet bores in engine block.

6. Ensure that tappets rotate freely in their respective bores.

7. Inspect pushrod contact area of tappet, replace tappet if surface is rough or pitted.

20

OVERHAUL

Camshaft and tappets - refit

1. Lubricate camshaft journals with clean engine oil and carefully insert camshaft into cylinder block.

2. Immerse tappets in clean engine oil. Before fitting, pump the inner sleeve of tappet several times using a pushrod, to prime tappet and reduce tappet noise when engine is first started.

3. Lubricate tappet bores with clean engine oil and fit tappets in removed order.

NOTE: Some tappet noise may be evident on initial start-up. If necessary, run the engine at 2500 rev/min for a few minutes until noise ceases.

4. Fit timing chain and gears.

5. Fit rocker shaft assemblies.

ENGINE

Piston rings - inspection

1. Temporarily fit new compression rings to piston.

NOTE: The ring marked ’TOP’ must be fitted, with marking uppermost, into second groove. The chrome ring fits into top groove and can be fitted either way round.

2. Check compression ring to groove clearance:

Top compression ring A = 0.05 to 0.10 mm.

2nd compression ring B = 0.05 to 0.10 mm.

PISTONS, CONNECTING RODS, PISTON RINGS

AND CYLINDER BORES

Pistons and connecting rods - remove

1. Remove cylinder head(s).

2. Remove big-end bearings.

3. Remove carbon ridge from top of each cylinder bore.

4. Suitably identify each piston to its respective cylinder bore.

5. Push connecting rod and piston assembly to top of cylinder bore and withdraw assembly.

6. Remove plastic tubing from connecting rod bolts.

7. Repeat above procedure for remaining pistons.

Piston rings - remove

1. Using a suitable piston ring expander, remove piston rings.

2. Remove carbon from piston ring grooves.

NOTE: Use an old broken piston ring with a squared off end.

CAUTION: Do not use a wire brush.

3. Insert new piston ring into relevant cylinder, held square to bore with piston, and check ring gaps.

Top compression ring = 0.44 to 0.57 mm.

2nd compression ring = 0.44 to 0.57 mm.

Oil control ring rails = 0.38 to 1.40 mm.

4. Use a fine-cut flat file to increase gap if required. Select a new piston ring if gap exceeds limit.

OVERHAUL

21

ENGINE

Pistons - remove Pistons - inspection

1. Clean carbon from pistons

2. Inspect pistons for distortion and cracks.

1. Clamp hexagon body of LRT-12-013 in vice.

2. Screw large nut back until flush with end of centre screw.

3. Push centre screw forward until nut contacts thrust race.

4. Locate piston adapter LRT-12-014 with its long spigot inside bore of hexagon body.

5. Fit parallel sleeve, grooved end first, onto centre screw and smear outside diameter with engine oil.

6. Locate piston and connecting rod assembly on centre screw and up to adapter LRT-12-014.

7. Fit remover/replacer bush of LRT-12-014 on centre screw with flanged end away from gudgeon pin.

8. Screw stop nut onto centre screw leaving clearance A, between nut and remover/replacer bush.

Clearance A = 3 mm.

9. Lock the stop nut securely with lockscrew.

10. Push connecting rod to right to locate end of gudgeon pin in adapter LRT-12-014.

11. Ensure remover/replacer is located in gudgeon pin bore of piston.

12. Screw large nut up to thrust race.

13. Hold lockscrew and turn large nut until gudgeon pin is withdrawn from piston.

14. Dismantle tool and remove piston, connecting rod and gudgeon pin.

15. Repeat above operation for remaining pistons.

3. Measure piston diameter at 90

° to gudgeon pin axis and 8 mm from bottom of skirt. The piston must be 0.018 mm to 0.033 mm smaller than cylinder bore.

22

OVERHAUL

Cylinder bore - inspection

ENGINE

Pistons - refit

CAUTION: On later 4.2L engines the piston has a 0.5 mm offset gudgeon pin which can be identified by an arrow mark on the piston crown. This arrow MUST always point to the front of the engine.

1. Measure cylinder bore wear in two axis 40 to

50 mm from top of bore.

Piston to cylinder bore clearance = 0.018 to

0.033 mm.

NOTE: Pistons are available in service standard size and 0.508 mm oversize.

Service standard size pistons are supplied

0.0254 mm oversize. When fitting new service standard size pistons, check for correct piston to bore clearance, hone bore if necessary.

CAUTION: The temperature of piston and cylinder block must be the same to ensure accurate measurement. When reboring cylinder block, the crankshaft main bearing caps must be fitted and bolts tighten to correct torque.

2. If only new piston rings are to be fitted, break cylinder bore glazing using a fine grit, to produce a 60

° cross-hatch finish.

CAUTION: Ensure all traces of grit are removed after above operation.

Connecting rod - inspection

1. Check alignment of connecting rod.

1.

4.2L engine only: Assemble pistons to connecting rods with arrow on piston pointing towards domed shaped boss on connecting rod for RH bank of cylinders, and arrow pointing away from dome shaped boss for LH bank of cylinders.

2. Clamp hexagon body of LRT-12-013 in vice.

3. Remove large nut and pull the centre screw 50 mm out of hexagon body.

4. Locate piston adapter LRT-12-014 with its long spigot inside bore of hexagon body.

5. Fit parallel sleeve, grooved end last, up to shoulder on centre screw.

6. Lubricate gudgeon pin and bores of connecting rod and piston with graphited oil.

7. Locate connecting rod and piston to centre screw with connecting rod entered on sleeve up to groove.

OVERHAUL

23

ENGINE

8. Fit gudgeon pin onto centre screw and into piston bore up to connecting rod.

9. Fit remover/replacer bush with flanged end towards gudgeon pin.

10. Screw the stop nut onto centre screw and position piston against face of adaptor

LRT-12-014.

11. Lubricate centre screw threads and thrust race with graphited oil, fit, and screw large nut up to thrust race.

12. Adjust stop nut leaving clearance B, between nut and remover/replacer bush.

Clearance B = 0.8 mm.

13. Lock the stop nut securely with lockscrew.

14. Set torque wrench to 16 Nm, and using socket on large nut, pull gudgeon pin in until flange of remover/replacer bush is distance C from face of piston.

Distance C = 4 mm.

CAUTION: Flange of remover/replacer must not be allowed to contact piston. If torque figure is not achieved during above operation, fit of gudgeon pin to connecting rod is not acceptable and necessitates renewal of components. The centre screw and thrust race must be kept well lubricated throughout operation.

15. Dismantle tool, remove piston, check no damage has occurred during pressing and piston moves freely on gudgeon pin.

16. Repeat above operation for remaining pistons.

Pistons and connecting rods - refit

1. Fit oil control ring rails and expander, ensuring ends butt and not overlap.

2. Fit ring marked ’TOP’ with marking uppermost into second groove.

3. Fit top compression ring into groove either way round.

4. Position oil control expander ring joint and ring rail gaps all at one side, between gudgeon pin and piston thrust face. Space gaps in ring rails approximately 25 mm each side of expander ring joint.

5. Position compression rings with ring gaps on opposite sides of piston between gudgeon pin and piston thrust face.

6. Fit big-end bearing shell to connecting rod.

7. Lubricate big-end bearing shell, piston rings and gudgeon pin with engine oil.

8. Lubricate cylinder bores and crankshaft big-end journals with engine oil.

24

OVERHAUL

FLYWHEEL

Flywheel- remove

ENGINE

9. Fit ring clamp to piston and compress piston rings.

10. Fit plastic tubing to connecting rod bolts.

1. Restrain crankshaft and remove 6 bolts securing flywheel.

2. Remove flywheel.

Inspect

11. Insert connecting rod and piston assembly into respective cylinder bore ensuring domed shaped boss on connecting rod faces towards front of engine on RH bank of cylinders, and towards rear on LH bank of cylinders.

NOTE: When both connecting rods are fitted to each journal, bosses will face towards each other.

12. Pull connecting rod on to crankshaft journal.

CAUTION: Take care not to scratch crankshaft journals.

13. Fit big-end bearing caps and bearing shells.

14. Fit cylinder head(s).

1. Inspect flywheel face for cracks, scores and overheating. The flywheel can be refaced providing thickness does not go below minimum.

Flywheel minimum thickness A = 39.93 mm

2. Inspect ring gear for worn, chipped and broken teeth.

3. Renew ring gear if necessary.

OVERHAUL

25

ENGINE

Flywheel ring gear - renew

1. Drill a 10 mm diameter hole axially at base of tooth and inner diameter of starter ring, sufficiently deep enough to weaken ring gear.

CAUTION: Do not allow drill to enter flywheel.

2. Secure flywheel in soft jawed vice.

3. Split ring gear using a cold chisel.

WARNING: Wear safety goggles and take precautions against flying fragments when splitting ring gear.

4. Remove flywheel from vice, remove old ring gear, and place flywheel, clutch side down, on a flat surface.

5. Heat new ring gear uniformly to between

170

° and 175

°

C.

CAUTION: Do not exceed this temperature.

6. Locate ring gear on flywheel with chamfered inner diameter towards flywheel flange.

NOTE: If ring gear is chamfered on both sides, it can be fitted either way round.

7. Press ring gear onto flywheel until it butts against flywheel flange.

8. Allow flywheel to air cool.

Flywheel - refit

1. Fit flywheel and locate on 2 dowels.

2. Fit flywheel bolts.

3. With assistance, restrain crankshaft and tighten flywheel bolts to correct torque.

26

OVERHAUL

DRIVE PLATE AND RING GEAR ASSEMBLY

Drive plate and ring gear assembly - remove

1. Mark each component to enable reassembly in original position.

ENGINE

Drive plate and ring gear assembly - refit

CAUTION: To prevent distortion to flexible drive plate when bolted to torque converter, drive plate setting height must be checked as follows:

2. Remove 4 bolts securing drive plate.

3. Remove clamp ring, flexible drive plate, hub aligner and ring gear assembly.

4. Remove 6 socket head screws securing crankshaft adapter plate, remove adapter plate and selective shim.

Inspect

1. Inspect flexible drive plate for cracks and distortion.

2. Renew drive plate if necessary.

3. Inspect ring gear for worn, chipped and broken teeth.

4. Renew ring gear assembly if necessary.

1. Fit existing shim and crankshaft adapter plate.

2. Fit socket head screws and lightly tighten.

3. Fit ring gear assembly, hub aligner, drive plate and clamping ring, fit bolts and lightly tighten.

4. Check the setting height.

Drive plate setting height A = 8.08 to 8.20 mm.

5. Remove bolts, remove clamp ring, flexible drive plate, hub aligner and ring gear assembly.

6. Remove socket head screws, remove crankshaft adapter and shim.

OVERHAUL

27

ENGINE

7. Measure existing shim and, if necessary, select appropriate shim to maintain setting height.

Shims available:

1.20 - 1.25mm

1.30 - 1.35mm

1.40 - 1.45mm

1.50 - 1.55mm

1.60 - 1.65mm

1.70 - 1.75mm

1.80 - 1.85mm

1.90 - 1.95mm

2.00 - 2.05mm

2.10 - 2.15mm

8. Fit shim selected, position adapter, ensuring marks previously made line up, fit socket head bolts and tighten to correct torque.

9. Fit ring gear assembly, hub aligner, flexible drive plate and clamp ring. ensuring marks previously made line up.

10. Apply Loctite 242 to threads of bolts, fit bolts and tighten to correct torque.

CRANKSHAFT, MAIN AND BIG-END BEARINGS

Crankshaft end - float - check

Big-end bearings - remove

1. Remove sump.

2. Remove 2 bolts securing oil strainer.

3. Remove strainer, remove and discard gasket.

4. Suitably identify bearing caps to their respective connecting rods.

1. Set-up DTI to measure end float.

2. Move crankshaft forwards and zero gauge.

3. Move crankshaft rearwards, record end-float reading obtained.

Crankshaft end-float = 0.10 to 0.20mm.

4. Remove DTI.

NOTE: Crankshaft end-float is controlled by thrust faces on upper half of centre main bearing shell.

5. Remove 2 nuts securing each bearing cap.

6. Remove bearing cap and bearing shell.

CAUTION: Keep bearing caps and shells in their fitted order.

7. Fit a length of plastic tubing over each connecting rod bolt.

8. Push each piston up its respective bore and remove shells from connecting rods.

CAUTION: Keep bearing shells in their fitted order.

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OVERHAUL

ENGINE

Big-end bearings - Inspection

1. Check big-end bearing shells for wear and damage.

2. Renew big-end bearing shells as necessary.

NOTE: Big-end bearings are available in

0.254 mm and 0.508 mm undersizes.

Big-end bearings - refit

1. Fit bearing shells to each connecting rod.

2. Lubricate bearing shells and crankshaft journals with clean engine oil.

3. Pull connecting rods onto crankshaft journals and remove plastic tubing.

4. Fit bearing shells to each big-end bearing cap.

8. Check clearance between connecting rods on each crankshaft journal.

Connecting rod clearance = 0.15 to 0.37 mm.

9. Clean oil strainer.

10. Clean gasket mating faces on strainer and cylinder block.

11. Fit gasket to strainer, position strainer, fit bolts and tighten to correct torque.

12. Fit sump.

5. Lubricate bearing shells and fit bearing caps ensuring reference marks on connecting rods and bearing caps are aligned.

NOTE: Rib on edge of bearing cap must face towards front of engine on RH bank of cylinders and towards rear on LH bank of cylinders.

6. Fit bearing cap nuts and tighten to correct torque.

7. Check connecting rods move freely sideways on crankshaft. Tightness indicates insufficient bearing clearance or misaligned connecting rod.

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29

ENGINE

Crankshaft - remove

1. Remove flywheel or drive plate and ring gear assembly.

2. Remove timing cover.

3. Remove timing gears.

4. Remove big-end bearings.

Crankshaft - inspection

1. Clean crankshaft and blow out oil passages.

5. Starting at centre main bearing and working outwards, progressively slacken then remove

10 main bearing cap bolts.

6. Remove 5 main bearing caps and bearing shells, retain bearings with their caps.

7. Lift out crankshaft and rear oil seal. Remove and discard oil seal.

8. Remove 5 bearing shells from cylinder block and retain in their fitted order.

9. Remove and discard side seals from rear main bearing cap.

10. Remove Woodruff key from crankshaft.

2. Support crankshaft front and rear bearings on vee blocks, and using a DTI, measure run-out on centre main bearing.

Maximum permitted run-out = 0.08 mm.

If run-out exceeds permitted maximum, crankshaft is unsuitable for regrinding and should be renewed.

3. Measure each journal for overall wear and ovality.

Main bearing journal diameter = 58.409 to

58.422 mm

Maximum out of round = 0.040 mm.

Big-end bearing journal diameter = 50.800 to

50.812 mm

Maximum out of round = 0.040 mm.

If measurements exceed permitted maximum, regrind or fit new crankshaft.

NOTE: Ovality checks should be made at

120

°

intervals around each journal.

Crankshaft main bearings are available in

0.254 mm and 0.508 mm undersizes. When fitting

0.508 mm undersize bearings, centre main bearing, which controls crankshaft end-float, has thrust faces increased in thickness by 0.254 mm.

Therefore if 0.508 mm undersize bearings are fitted, 0.127 mm must be machined off each thrust face of centre main bearing journal to maintain correct radius.

30

OVERHAUL

Crankshaft dimensions:

ENGINE

Crankshaft spigot bearing - renew

1. Carefully extract old spigot bearing.

2. Clean bearing recess in crankshaft.

Bearing journal radius - all journals except rear main journal A = 1.90 to 2.28 mm.

Rear main bearing journal radius B = 3.04 mm.

Bearing journal diameter C :

Standard = 58.400 to 58.413mm.

0.254 mm undersize = 58.146 to 58.158 mm.

0.508 mm undersize = 57.892 to 57.904 mm.

Bearing journal width D :

Standard = 26.975 to 27.026 mm.

0.254 mm undersize = 26.975 to 27.026 mm.

0.508 mm undersize = 27.229 to 27.280 mm.

Bearing journal diameter E :

Standard = 50.800 to 50.812 mm.

0.254 mm undersize = 50.546 to 50.559 mm.

0.508 mm undersize = 50.292 to 50.305 mm.

3. Fit new bearing flush with, or to a maximum of

1.6 mm below end face of crankshaft.

4. Ream bearing to correct inside diameter.

Spigot bearing inside diameter = 19.177 +

0.025 mm.

5. Remove all traces of swarfe.

Crankshaft - refit

1. Clean main bearing caps, bearing shell recesses and mating surfaces of cylinder block.

2. Fit upper main bearing shells, with oil holes and grooves, in cylinder block, ensuring flanged shell is fitted in centre position.

3. Lubricate bearing shells with clean engine oil and position crankshaft in cylinder block.

4. Fit main bearing shells to bearing caps.

OVERHAUL

31

ENGINE

5. Apply EXP16A (Marston Lubricants) lubricant to threads of main bearing cap bolts.

6. Lubricate main bearing shells and fit numbers

1 to 4 bearing caps, fit and lightly tighten bolts.

7. Fit side seals to rear main bearing cap.

CAUTION: Seals must protrude approximately 1.5 mm above bearing cap face.

8. Apply Hylomar SQ32M jointing compound to bearing cap rear mating face on cylinder block.

9. Lubricate bearing shell and side seals with clean engine oil, carefully fit bearing cap assembly.

10. Fit bolts and lightly tighten.

11. Clean seal location and running surface on crankshaft.

12.

Engine numbers without suffix B: Clean seal protector LRT-12-010 and lubricate with engine oil.

13.

Engine numbers with suffix B: Clean seal protector LRT-12-095 and lubricate with engine oil.

14. Lubricate oil seal lip with engine oil.

NOTE: Seal protector LRT-12-095

illustrated.

15. Position seal protector to crankshaft.

16.

Engine numbers without suffix B: Fit oil seal squarely using hand pressure only until fully seated in recess.

17.

Engine numbers with suffix B: Fit seal using tool LRT-12-091.

18. Tighten main bearing cap bolts to correct torque.

19. Fit Woodruff key to crankshaft.

20. Check crankshaft end-float.

21. Fit big-end bearings.

22. Fit timing cover and gears.

23. Fit flywheel or drive plate and ring gear assembly.

32

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ENGINE

SERVICE TOOLS

Land Rover Number

LRT-12-010*

LRT-12-013

LRT-12-014

LRT-12-034

LRT-12-037

LRT-12-038

LRT-12-055

LRT-12-089**

LRT-12-090**

LRT-12-091**

LRT-12-095**

LRT-12-501

LRT-12-503

LRT-12-504

LRT-12-515

Rover Number

18G 1014*

18G 1150

18G 1150E

18G 1519

RO.274401

RO.600959

MS76B

MS150-8.5

MS76-621

RO.605774A

* Engine numbers without suffix B ** Engine numbers with suffix B

Service tools must be obtained direct from the manufacturers:

V.L. Churchill,

P.O. Box No 3,

London Road,

Daventry,

Northants, NN11 4NF.

England.

Description

Protection sleeve - crankshaft rear oil seal

Remover/replacer gudgeon pin

Adaptor remover/replacer gudgeon pin

Valve spring compressor

Drift remover - valve guide

Drift replacer - valve guide

Distance piece - valve guide

Replacer - timing cover oil seal

Retainer - oil pump gears

Replace - crankshaft rear oil seal

Protection sleeve - crankshaft rear oil seal

Basic handle set - valve seat cutters

Adjustable valve seat pilot

Adjustable valve seat cutter

Distance piece - valve guide

SERVICE TOOLS

1

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Key Features

  • Water-cooled
  • Eight-cylinder
  • Cast aluminium cylinder block
  • Cast aluminium cylinder heads
  • Five main bearings
  • Inverted tooth chain driven crankshaft
  • Hydraulic tappets
  • Rocker arm operation

Frequently Answers and Questions

What is the firing order for this engine?
The firing order is 1, 8, 4, 3, 6, 5, 7, 2.
What is the valve stem diameter for the inlet valve?
The valve stem diameter for the inlet valve is 8.664 to 8.679 mm.
What is the free length of the valve spring?
The free length of the valve spring is 48.30 mm.
What is the minimum regrind diameter for the crankshaft main journal?
The minimum regrind diameter for the crankshaft main journal is 57.393 to 57.406 mm.
What is the maximum run-out for the camshaft?
The maximum run-out for the camshaft is 0.05 mm.

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