GM Service Manual Online
For 1990-2009 cars only

Tools Required

KM-565-A Valve Spring Compressor

Removal Procedure


    Object Number: 1252099  Size: SH
  1. Remove the timing belt. Refer to Timing Belt Replacement .
  2. Disconnect the air breather tube at the valve cover.
  3. Remove the valve cover bolts.
  4. Remove the valve cover.
  5. Remove the valve cover gasket.

  6. Object Number: 1241633  Size: SH

    Important: Take extreme care to prevent any scratches, nicks, or damage to the camshaft. Such damage can impair vehicle operation.

  7. Install the KM-565-A  (1).
  8. Remove the roller followers using the KM-565-A  (1).

  9. Object Number: 1241557  Size: SH
  10. While holding the camshaft firmly in place, remove the camshaft gear bolt.
  11. Remove the camshaft gear.

  12. Object Number: 1241628  Size: SH
  13. Disconnect the positive battery cable from the battery.
  14. Remove the battery and the battery tray. Refer to Battery Tray Replacement .

  15. Object Number: 1241531  Size: SH
  16. Disconnect the electronic ignition (EI) system ignition coil connector.
  17. Disconnect the EI system ignition wires at the ignition coil.
  18. Remove the EI system ignition coil mounting nuts.
  19. Remove the EI system ignition coil.

  20. Object Number: 1241629  Size: SH
  21. Remove the EI system ignition coil mounting plate bolts.
  22. Remove the EI system ignition coil mounting plate.

  23. Object Number: 1241618  Size: SH
  24. Remove the camshaft pressure plate bolts.
  25. Remove the camshaft pressure plate.

  26. Object Number: 1241621  Size: SH
  27. Remove the camshaft.

Installation Procedure


    Object Number: 1241618  Size: SH
  1. Install the camshaft.
  2. Install the camshaft pressure plate.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the camshaft pressure plate bolts.
  5. Tighten
    Tighten the camshaft pressure plate bolts 10 N·m (89 lb in).

  6. Measure camshaft end play. Camshaft end play should be 0.09-0.21 mm.

  7. Object Number: 1241629  Size: SH
  8. Install the EI system ignition coil mounting plate.
  9. Install the EI system ignition and coil mounting plate bolts.
  10. Tighten
    Tighten the EI system ignition coil mounting plate bolts to 10 N·m (89 lb in).


    Object Number: 1241531  Size: SH
  11. Install the EI system ignition coil.
  12. Install the EI system ignition coil mounting bolts.
  13. Tighten
    Tighten the EI system ignition coil mounting bolts to 10 N·m (89 lb in).

  14. Connect the ignition wires at the EI system ignition coil.
  15. Connect the EI system ignition coil connector.

  16. Object Number: 1241628  Size: SH
  17. Install the battery and the battery tray. Refer to Battery Tray Replacement .
  18. Connect the positive battery cable to the battery.

  19. Object Number: 1241557  Size: SH

    Important: Take extreme care to prevent any scratches, nicks, or damage to the camshaft. Such damage can impair vehicle operation.

  20. Install the camshaft gear.
  21. While holding the camshaft firmly in place, install the camshaft gear bolt.
  22. Tighten
    Tighten the camshaft gear bolt to 45 N·m (33 lb ft).


    Object Number: 1241633  Size: SH
  23. Instal the camshaft followers using the KM-565-A  (1).
  24. Remove the KM-565-A  (1).

  25. Object Number: 1252099  Size: SH
  26. Install the valve cover gasket.
  27. Install the valve cover.
  28. Install the valve cover bolts.
  29. Tighten
    Tighten the valve cover bolts to 9 N·m (80 lb in).

  30. Connect the air breather tube to the valve cover.
  31. Install the timing belt. Refer to Timing Belt Replacement .