GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

    • J 23590 Spark plug Adapter
    • J 5892-D Valve Spring Compressor
    • J 38606 Valve Spring Compressor
  1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement (Left) .
  2. Remove the valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement
  3. Remove the spark plugs. Refer to Spark Plug Replacement in Ignition System.

  4. Object Number: 4048  Size: SH
  5. Install the J 23590
  6. Apply compressed air in order to hold the valves in place.
  7. Install the valve rocker arm nut.

  8. Object Number: 1964  Size: SH
  9. Use the J 5892-D

  10. Object Number: 31730  Size: SH
  11. Use the if clearance does not permit use of J 5892-D .

  12. Object Number: 31715  Size: SH
  13. Remove the valve keys (1).
  14. Carefully release the valve spring tension.
  15. Remove the J 5892-D or J 38606 .
  16. Remove the cap (2), rotator, and spring (4).
  17. Remove the valve seal (3).

Installation Procedure

Tools Required

    • J 23590 Spark Plug Port Adapter
    • J 5892-D Valve Spring Compressor
    • J 38606 Valve Spring Compressor

    Object Number: 31715  Size: SH
  1. Install the new valve seal (3) over the valve stem and set it against the head.
  2. Install the cap (2), rotator, and spring (4).
  3. Use the J 5892-D

  4. Object Number: 31730  Size: SH
  5. Use the if clearance does not permit use of J 5892-D .
  6. Install the valve keys (1). Use grease in order to hold the valve keys in place.

  7. Object Number: 1964  Size: SH
  8. Carefully release the valve spring pressure, making sure the valve keys stay in place.

  9. Object Number: 4048  Size: SH
  10. Remove the J 23590 J 5892-D or J 38606 .
  11. Install the spark plugs. Refer to Spark Plug Replacement in Ignition System.
  12. Install the valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement
  13. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement (Right) .