Cloyes Hex-A-Just 9-3146A (SB Chevy Rocket) User Manual

Page 2

April 29, 2009

side of the bearing will be facing the block.

Failure to install correctly will cause a

severe wear issue!

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 or 9-202) using the
instructions enclosed with it.

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.

Torque Loose Bolts. Torque the three (3) Cam
Sprocket mounting bolts 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 using a small
amount of gasket sealer if desired. Install the timing cover using the ten (10) mounting
bolts. Torque these bolts to 160 in-lb (13 ft-lb).

Adjusting the Timing

(Figure 2)