- Remove the valve rocker arm cover. Refer to
Valve Rocker Arm Cover Replacement
.
- Rotate the engine one revolution until the mark on the crankshaft
balancer lines up with the timing mark on the front cover, and the engine
is in the number one firing position. This may be determined by placing fingers
on the number one valve as the mark on the balancer comes near the timing
mark on the front cover. If the valve rocker arms are not moving, the engine
is in the number one firing position. If the valve rocker arms move as the
mark comes up to the timing mark, the engine is in the number six firing position.
The crankshaft should be rotated 360 degrees or one complete revolution in
order to reach the number one position.
- With the engine in the number one firing position as determined
above, the following valves may be adjusted (Even numbered cylinders are
in the right bank. Odd numbered cylinders are in the left bank):
- Back out the adjusting nut until lash is felt at the pushrod then turn
in the adjusting nut until all lash is removed. This can be determined by
rotating the pushrod while turning the adjusting nut. When the play has been
removed, turn the adjusting nut 360 degrees or one full additional
turn in order to center the valve lifter plunger.
- Crank the engine one revolution until the timing mark on the front
cover and the crankshaft balancer mark are again in alignment. This is the
number six firing position. The following valves may be adjusted:
- Install the valve rocker arm cover. Refer to
Valve Rocker Arm Cover Replacement
.
