GM Service Manual Online
For 1990-2009 cars only

    Object Number: 276378  Size: SH

    Caution: Wear safety glasses in order to avoid eye damage.

    Important: Do not clean or submerge the ignition coils in solvent.

    Remove the ignition coils before cleaning the cover in solvent.

  1. Clean the valve rocker arm cover in solvent.
  2. Dry the covers with compressed air.
  3. Inspect the covers for the following components:
  4. • Gouges or damage to the sealing surfaces
    • Dent or damage to the exterior of the cover
    • A dented or damaged cover may interfere with the valve rocker arms.
    • Restrictions to the ventilation system passages
    • The positive crankcase ventilation (PCV) valve grommet for cracking or damage
    • The valve cover gasket for cracking or damage.