GM Service Manual Online
For 1990-2009 cars only
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Object Number: 175510  Size: SH
  • Clean the valve rocker arm cover mating surface.
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  • Clean the valve rocker arm cover. Remove all sludge and oil deposits.
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  • Ensure that the oil/air separator passages in the cover are clean by flushing them with solvent.
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  • Inspect the valve rocker arm cover for damage. Replace the valve rocker arm cover if any damage is found.
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  • Install a new rocker arm cover gasket when installing the rocker arm cover.