GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 8062 Valve Spring Compressor
    • J 38820 Valve Stem Seal Remover/Installer
    • J 42037 Valve Spring Compressor Adapter/Head Off
    • J 43059 Valve Stem Key Remover/Installer
  1. Using an appropriately sized deep socket and a plastic hammer, lightly tap on the valve spring retainer to loosen the valve keepers.

  2. Object Number: 287934  Size: SH

    Caution: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.

    Notice: Do not compress the valve springs to less than 24.0 mm (0.943 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage.

  3. Compress the valve spring using the J 8062 and the J 42037 .

  4. Object Number: 287931  Size: SH
  5. Use the magnetic end of the J 43059 in order to remove the valve keepers.
  6. Remove the valve spring compressor and the pilot.

  7. Object Number: 263913  Size: SH
  8. Remove the valve spring retainer (2).

  9. Object Number: 240799  Size: SH
  10. Remove the valve spring.

  11. Object Number: 287935  Size: SH

    Important: NEVER reuse a valve stem oil seal.

  12. Remove the valve stem oil seal using the J 38820 and discard.

  13. Object Number: 240796  Size: SH
  14. Remove the valve (1).
  15. Repeat these procedures for the remaining valves.

  16. Object Number: 483025  Size: SH
  17. Remove the water jacket hole expansion plugs from the left cylinder head, if required.

  18. Object Number: 483046  Size: SH
  19. Remove the water jacket hole expansion plugs from the right cylinder head, if required.

  20. Object Number: 240824  Size: SH
  21. Remove the side oil gallery threaded plugs from the left cylinder head, if required.

  22. Object Number: 483049  Size: SH
  23. Remove the side oil gallery threaded plugs from the right cylinder head, if required.

  24. Object Number: 483013  Size: SH
  25. Remove the upper water jacket hole threaded plugs from the left cylinder head, if required.

  26. Object Number: 483017  Size: SH
  27. Remove the upper water jacket hole threaded plug from the right cylinder head, if required.