Cloyes Hex-A-Just 9-3100B (SB Chevy BB Crank) User Manual

Page 2

April 24, 2009

9-3100B 2

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.

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.

Install the Cam Button. Install the cam button (Part Number 9-200) using the
instructions enclosed with it.

Adjust the Camshaft Timing. Do NOT try to turn
the camshaft with the bushing unless there is

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.

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. Install the timing cover gasket (Part Number 9-
207) using a small amount of gasket sealer if desired. Mount the Cloyes Quick Button

Polished Aluminum Two-Piece Timing Cover (Part Number 9-227) and install the ten(10)
mounting bolts. Torque these bolts to 160 in-lb (13 ft-lb).