Generac GT-530 — Check and Adjust Valves

Adjustments · Engine valves

For the Generac GT-530, from the Generac service manual.

Applies to: Generac GH-410 engine, Generac GT-530 engine, Generac GT-990 engine, Generac GT-999 engine

Procedure

1. Remove the four (4) screws from the rocker cover.
2. Remove the rocker cover and rocker cover gasket.
3. Loosen the rocker arm jam nut.
4. Use a 10mm allen wrench to turn the pivot ball stud.
5. Check clearance between rocker arm and valve stem with a flat feeler gauge.
6. Set valve clearance to 0.05-0.1mm (0.002-0.004 in.) cold.
7. Hold pivot ball stud with allen wrench and tighten rocker arm jam nut to 174 inch pounds.
8. Recheck valve clearance to make sure it did not change.
9. Re-install rocker cover gasket, rocker cover and the four screws.

Source: Generac 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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