Cloyes Hex-A-Just 9-3149A (BB Chevy Gen VI) User Manual

Cloyes For the car

April 24, 2009

Installation Instructions

9-3149A 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 (LockTite7 #271 or equiv.)

1.

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 sprockets 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.