GM Service Manual Online
For 1990-2009 cars only

Special Tools

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

Removal Procedure

    Important: Prevent the crankshaft from rotating clockwise or counterclockwise before using compressed air in the cylinder. Rotation of the crankshaft may cause damage to the J 43653 .

  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 the J 43653 .
  4. Remove the camshaft. Refer to Intake Camshaft and Valve Lifter Replacement or Exhaust Camshaft and Valve Lifter Replacement.

  5. Object Number: 758358  Size: SH
  6. Remove the camshaft roller followers.

  7. Object Number: 758361  Size: SH
  8. Install the J 43649 to the cylinder head.
  9. Remove the spark plugs. Refer to Spark Plug Replacement.

  10. Object Number: 758363  Size: SH
  11. Install an air hose adaptor into the spark plug hole.
  12. Pressurize the cylinder to 690 kPa (100 psi).
  13. Compress the valve spring.
  14. Remove the valve spring keepers.
  15. Remove the valve spring.

  16. Object Number: 758364  Size: SH
  17. Using the J 36017 , remove the valve seal.

Installation Procedure


    Object Number: 758364  Size: SH
  1. Using the J 36017 , install the valve seal.

  2. Object Number: 758363  Size: SH
  3. Install the valve spring.
  4. Compress the valve spring.
  5. Install the valve spring keepers.
  6. Remove the air hose adaptor from the spark plug hole.

  7. Object Number: 758361  Size: SH
  8. Remove the J 43649 from the cylinder head.
  9. Install the spark plugs. Refer to Spark Plug Replacement.

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