General Motors 5.0 / 5.7 — Valve Lash Adjustment

Adjustments · Valve rocker arm

For the General Motors 5.0 / 5.7, from the General Motors service manual.

Procedure

1. Turn rocker arm nuts clockwise until all valve lash is removed.
2. Turn crankshaft to align balancer mark with front cover notch (No.1 firing).
3. Adjust exhaust valves 1,3,4,8 and intake valves 1,2,5,7.
4. Turn nut counterclockwise until lash felt in pushrod.
5. Turn nut clockwise until all lash removed (zero lash).
6. Turn nut clockwise 1 additional turn (360 degrees).
7. Turn crankshaft 1 revolution to No.6 firing position.
8. Adjust exhaust 2,5,6,7 and intake 3,4,6,8 the same way.

Source: General Motors service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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