Valve Clearance: Adjustments

Important: Adjust valves when lifter is on base circle of camshaft lobe.

A. Engine should be in number 1 firing position. This may be determined by placing fingers on number 1 rocker arms as crankshaft assembly is rotated. If valves are not moving, engine is in number 1 firing position. If valves move, engine is in number 4 firing position and should be rotated one revolution to reach number 1 position.

B. With engine in number 1 firing position, following valves should be adjusted:
Exhaust - 1, 2, 3
Intake - - 1, 5, 6

C. Tighten adjusting nut until there is zero lash + one and one half (1.5) turns.
This can be determined by rotating pushrod while turning adjusting nut.
When lash has been removed, turn adjusting nut in one and one half (1.5) additional turns (to center lifter plunger).

D. Crank engine one revolution. This is number 4 firing position. With engine in this position, following valves should be adjusted to zero lash + one and one half (1.5) turns:
Exhaust - 4, 5, 6
Intake - - 2, 3, 4