GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1665439  Size: SH

    Important: 

       â€¢ Do not use the valve rocker arm cover gasket again. Install a NEW gasket during assembly.
       â€¢ Remove the ignition coils before cleaning the cover in solvent. Do not submerge the ignition coils in solvent.
       â€¢ Do not remove the oil fill tube from the covers unless service is required.
       â€¢ If the oil fill tube has been removed from the rocker arm cover, install a NEW tube during assembly.

  1. Inspect the oil fill tube (423) for a loose fit or damage.

  2. Object Number: 1602760  Size: SH
  3. Inspect the covers for the following conditions:
  4. • Scoring or damage to the gasket surfaces (1)
    • Ventilation system passages (2, 3) for restrictions
    • Threaded bolt holes (4) for damage or debris