Lumina V6-3100 3.1L VIN M SFI (1995)
b. With the engine in the # 1 position, the following valves should be adjusted:
^
Exhaust - 1, 2, 3.
^
Intake - 1, 5, 6.
c. Tighten the adjusting nut until there is zero lash, this can be determined by rotating pushrod while turning adjusting nut. When lash has been
removed, turn adjusting nut in 1.5 additional turns (to center lifter plunger).
d. Crank the engine one revolution. This is the # 4 firing position.
With the engine in this position, the following valves should be adjusted to zero lash plus 1.5 turns:
^
Exhaust - 4, 5, 6.
^
Intake - 2, 3, 4.
