GM Service Manual Online
For 1990-2009 cars only
  1. Clean the valve rocker arm cover in solvent.
  2. Caution: Wear safety glasses in order to avoid eye damage.

  3. Dry the component with compressed air.

  4. Object Number: 4042  Size: SH
  5. Inspect the valve rocker arm cover for the following:
  6. • Cracks or damage to the exterior of the cover
    • Damaged gasket groove
    • Restrictions to the ventilation system passages
    • Cracking around the cover retaining bolt holes
    • Damaged PCV valve grommet
    • Damage to the oil fill opening