GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 43649 Valve Spring Compressor
    • J 36017 Valve Guide Seal Remover
    • J 43653 Flywheel Holding Tool
    • J 43655 Sprocket Holding Tool

Removal Procedure

Important: Prevent the crankshaft from rotating clockwise or counter-clockwise before using compressed air in the cylinder. Rotation of the crankshaft may cause damage to J 43655 .

  1. If equipped, with a manual transmission leave the transmission in first gear with the vehicle on the ground and the parking brake set.
  2. If equipped, with an automatic transmission, remove the starter. Refer to Starter Motor Replacement .
  3. Install J 43653 .

  4. Object Number: 758358  Size: SH
  5. Remove the camshaft. Refer to Intake Camshaft and Valve Lifter Replacement or Exhaust Camshaft and Valve Lifter Replacement .
  6. Remove the camshaft roller followers.

  7. Object Number: 1675266  Size: SH
  8. Install the front section of the J 43649 to the second camshaft cover bolt hole.

  9. Object Number: 1675271  Size: SH
  10. Install the remaining parts of the J 43649 to the cylinder head.
  11. Remove the spark plugs. Refer to Spark Plug Replacement .

  12. Object Number: 758363  Size: SH
  13. Install an air hose adapter into the spark plug hole.
  14. Attach an air hose to the adapter
  15. Using the compressed air, pressurize the cylinder to 690 kPa (100 psi).
  16. Compress the valve spring using the J 43649 .

  17. Object Number: 1403900  Size: SH
  18. Remove the valve spring keepers.
  19. Remove the valve spring retainer.

  20. Object Number: 1403902  Size: SH
  21. Remove the valve spring.

  22. Object Number: 758364  Size: SH
  23. Using the J 36017 remove the valve seal.

Installation Procedure


    Object Number: 758364  Size: SH
  1. Using the J 36017 install the NEW valve seal. Fully seat the seal onto the valve guide.

  2. Object Number: 1403902  Size: SH
  3. Install the valve spring.

  4. Object Number: 1403900  Size: SH
  5. Install the valve spring retainer.
  6. Compress the valve spring using the J 43649 .
  7. Install the valve spring keepers.

  8. Object Number: 758363  Size: SH
  9. Disconnect the air hose from the adapter.
  10. Remove the air hose adapter from the spark plug hole.

  11. Object Number: 1675271  Size: SH
  12. Remove the J 43649 from the cylinder head.
  13. Install the spark plugs. Refer to Spark Plug Replacement .

  14. Object Number: 758358  Size: SH
  15. Install the camshaft roller followers.
  16. Install the camshaft. Refer to Intake Camshaft and Valve Lifter Replacement or Exhaust Camshaft and Valve Lifter Replacement .
  17. If used, remove the J 43653 .
  18. If removed, install the starter. Refer to Starter Motor Replacement .