GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

    • J 23590 Spark Plug Port 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 or Valve Rocker Arm Cover Replacement .
  2. Remove the valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
  3. Remove the spark plugs. Refer to Spark Plug in Engine Electrical.

  4. Object Number: 4048  Size: SH
  5. Install the J 23590 into the spark plug hole.
  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 23590 in order to compress the valve spring.

  10. Object Number: 31730  Size: SH
  11. Use the J 38606 if clearance does not permit use of J 23590.

  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
  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 23590 in order to compress the valve spring.

  4. Object Number: 31730  Size: SH
  5. Use the J 38606 if clearance does not permit use of J 23590.
  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 5892-D or J 38606 and the J 23590 .
  11. Install the spark plugs. Refer to Spark Plug in Engine Electrical.
  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 or Valve Rocker Arm Cover Replacement .