Cloyes Hex-A-Just 9-3153A (Chevy LS1) User Manual

Cloyes For the car

9-3153A 1

Installation Instructions

9-3153A Hex-A-Just® 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

Prepare the Engine. Loosen all rocker arms so that the camshaft can rotate freely.

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.

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.

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 your engine's CAMSHAFT
TIMING to EXACTLY WHERE YOU WANT IT.

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

Hex-A-Just

Bushing in

place. Be sure that the timing mark aligns with the crankshaft timing mark. Start the
camshaft bolts to hold the cam sprocket in place, but leave the bolts slightly loose.