- Remove the valve rocker arm cover. Refer to
Valve Rocker Arm and Push Rod Replacement
.
- Crank the engine 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. Rotate the
crankshaft 360° or one complete revolution in order to reach the number
one position.
- With the engine in the number one firing position as determined
above, adjust the following valves (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° 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
.
