Rocker Arm Assembly: Adjustments

VALVE ADJUSTMENT

Fig. 7 Valve adjustment:

1. Remove the rocker arm cover.

2. Crank the engine until the mark on the torsional damper lines up with the "0" mark on the timing tab 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 damper comes near the "0" mark on the timing tab. If the rocker arms are not moving, the engine is in the number one firing position. If the rocker arms move, as the mark comes up to the timing tab, the engine is in the number four firing position and should be turned over one more time to reach the number one position.

3. With engine in the number one firing position as determined above, the following valves may be adjusted:

- Exhaust: 1, 5, 6.

- Intake: 1, 2, 3.

(Even numbered cylinders are in the right bank; odd numbered cylinders are in the left bank, when viewed from the rear of the engine).

4. Back out the adjusting nut until lash is felt at pushrod, then turn in the adjusting nut until all lash is removed. This can be determined by rotating the pushrod while turning adjusting nut. When the play has been removed, turn the adjusting nut in one full turn (to center lifter plunger).

5. Crank the engine one full revolution until the timing tab "0" mark and vibration dampner mark are again in alignment. This is the number four firing position. The following valves may be adjusted:

- Exhaust: 2, 3, 4.

- Intake, 4, 5, 6.

6. Install the rocker arm cover.