Installation Instructions 9-3110A Hex-A

April 24, 2009
Installation Instructions
9-3110A Hex-A-Just® True Roller Timing Set
BEFORE YOU BEGIN: READ ALL OF THESE INSTRUCTIONS FIRST !!!
Note: The installation procedures which follow assume that the engine has been disassembled
and cleaned as it would be for a normal timing set change.
YOU WILL NEED:
TOOLS:
1/4" Hex Bit Socket or Hex Wrench
Torque Wrench
Hammer
Sleeve to fit over crankshaft for installing Crankshaft Sprocket
Degree Wheel (Optional, but Recommended)
SUPPLIES:
Assembly Lube or Camshaft Lube
Thread Locking Compound (LockTite® #271 or equiv.)
Cloyes Cam Button (Part Number 9-200 or 9-202) (Optional, but Recommended).
1.
Prepare the Engine. Loosen all rocker arms so that the camshaft can rotate freely.
2.
Clean everything! Make sure that the engine mounting surfaces and timing set
components are as clean as possible. The life of the chain and bearings depends on it.
3.
Mount the Crankshaft Sprocket. Select the appropriate keyway for the camshaft timing
baseline desired. We recommend the Standard Timing position, which used the round
timing mark and round keyway mark. Carefully tap the sprocket onto the crankshaft using
a sleeve to protect the sprocket. Make sure that the sprocket is fully seated on the
crankshaft. Rotate the crankshaft until the appropriate crankshaft sprocket timing mark is
in the 12:00 position. Make sure that the number one piston is at top dead center.
4.
Insert the Hex-A-Just® Timing Bushing.
Insert the offset bushing (with the Hex hole) into
the slot in the camshaft sprocket hub. Rotate it
with a 1/4" Hex Wrench so that the timing mark
on the bushing points away from the center of
the hub (Figure 1). The Hex-A-Just® Adjustable
Timing Bushing is infinitely adjustable so you
can fine adjust you engine's CAMSHAFT
TIMING to EXACTLY WHERE YOU WANT IT.
© Copyright 2007, Cloyes Gear Company.
All rights reserved.
9-3110A
1
April 24, 2009
5.
Install the Camshaft Thrust Bearing. Install the Thrust Needle Bearing on the back
side of the camshaft gear with the black side of the bearing facing gear hub, so the
silver side of the bearing will be facing the block.
6.
Mount the Camshaft Sprocket. Loop the chain over the camshaft sprocket. Align the
camshaft and crankshaft timing marks and loop the chain around the crankshaft sprocket.
Lift the camshaft sprocket into place on the camshaft, with the Thrust Bearing and Hex®
A-Just Bushing in place. Be sure that the timing mark aligns with the crankshaft timing
mark, and that the Thrust Bearing has not slipped off of the shoulder on the sprocket hub.
Bolt it in place using the existing GM bolts or equivalent. Install these bolts slightly loose.
7.
Install the cam button. Install the cam button using the instructions enclosed with it.
8.
Adjust the Camshaft Timing. Do NOT try to turn
the camshaft with the bushing unless there is NO
LOAD on the camshaft. There must be NO VALVE
SPRING PRESSURE against the camshaft or the
Hex-A-Just® bushing will SPLIT. Make sure that
the three camshaft bolts are LOOSE. For a simple
installation, adjust the Hex-A-Just® bushing to the
desired timing setting (Figure 2). For a more
accurate installation, use a degree wheel. The
degree wheel method is strongly recommended.
9.
Torque Loose Bolts. Remove each of the three bolts, one at a time, and apply the
thread Locking Compound, then torque each bolt to 300 in-lb (25 ft-lb).
10.
Lubricate the Timing Set. Make sure that the engine oil has a clear path to the timing
set through the lifter valley oil drain-back holes, or through some other means. A timing
set requires plenty of oil to survive. Before installing the timing cover gasket and timing
cover, pour plenty of assembly lube over the sprockets and bearings. Assembly lube will
stay on the sprockets until the engine is started.
11.
Install the Timing Cover and Gasket. Torque these bolts to 160 in-lb (13 ft-lb).
© Copyright 2007, Cloyes Gear Company.
All rights reserved.
9-3110A
2
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