GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • EN 47518 (09916-48210) Valve Spring Compressor
    • EN 46569 (09916-14510) Valve Spring Compressor
    • EN-46571 (09916-44910) Valve Guide Remover

    Caution: Refer to Safety Glasses Caution in the Preface section.

    Caution: Refer to Exhaust Service Caution in the Preface section.


    Object Number: 1240586  Size: SH

    Caution: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.

  1. Remove the cylinder head with the intake manifold and the exhaust manifold attached. Refer to Cylinder Head Replacement .
  2. Remove the bolt and the nuts in the water outlet case.
  3. Remove the water outlet case.

  4. Object Number: 1240588  Size: SH
  5. Remove the exhaust manifold heat shield bolts.
  6. Remove the exhaust manifold heat shield (1).

  7. Object Number: 1240589  Size: SH
  8. Remove the exhaust manifold nuts and the bolts.
  9. Remove the exhaust manifold gasket.
  10. Remove the exhaust manifold studs.

  11. Object Number: 1240591  Size: SH
  12. Remove the spark plugs.

  13. Object Number: 1291964  Size: SH
  14. Remove the intake manifold retaining bolts and the nuts.
  15. Remove the intake manifold with the gasket.
  16. Remove the intake manifold studs.

  17. Object Number: 1240595  Size: SH
  18. Remove the rocker arm shaft mounting bolts.

  19. Object Number: 1240596  Size: SH
  20. Remove the rocker arm spring and the rocker arm.

  21. Object Number: 1240598  Size: SH
  22. Remove the screws with the camshaft thrust plate.

  23. Object Number: 1240599  Size: SH
  24. Remove the camshaft.

  25. Object Number: 1240602  Size: SH
  26. Remove the camshaft front oil seal from the housing hole.

  27. Object Number: 1240603  Size: SH
  28. Using EN 46569 with the EN 47518 , compress the valve spring.
  29. Remove the valve keepers.
  30. Remove the valve spring retainer and valve spring.
  31. Remove the valves.

  32. Object Number: 1240605  Size: SH
  33. Remove the valve stem oil seals.
  34. Remove the valve spring seat.

  35. Object Number: 1240607  Size: SH
  36. Position the EN 46571  (1) on the valve guide.
  37. Hammer and remove the valve guide from the combustion chamber to the direction of the installed valve spring using the EN 46571  (1).
  38. Remove the valve guide.