GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 42069 Timing Belt Alignment Kit

Removal Procedure


    Object Number: 894285  Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the air cleaner assembly.

  3. Object Number: 894303  Size: SH
  4. Remove the front timing belt cover. Refer to Timing Belt Rear Cover Replacement .

  5. Object Number: 894187  Size: SH
  6. Remove the timing belt. Refer to Timing Belt Replacement .
  7. As a precaution, rotate the crankshaft counterclockwise to 60 degrees BTDC position to prevent valve/piston contact.

  8. Object Number: 894899  Size: SH
  9. Remove the camshaft gears using the camshaft lock kit tools J 42069-1 and J 42069-2 within the J 42069 to lock the gears when initially loosening the camshaft gear bolts.

  10. Object Number: 894875  Size: SH
  11. Remove the timing belt tensioner bracket bolts.
  12. Remove the timing belt tensioner bracket.

  13. Object Number: 894229  Size: SH
  14. Remove the lower timing belt idler pulley bolt.
  15. Remove the lower timing belt idler pulley.

  16. Object Number: 894731  Size: SH
  17. Remove the rear timing belt cover bolts.
  18. Remove the rear timing belt threaded pin.
  19. Remove the rear timing belt cover.

Installation Procedure


    Object Number: 894731  Size: SH
  1. Install rear timing belt cover.
  2. Coat threaded pin with Threadlocker LOCTITE® 242 compound, or equivalent.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the rear timing belt cover bolts.
  5. Tighten
    Tighten the rear timing belt cover bolt to 8 N·m (71 lb in).

  6. Install the rear timing belt threaded pin.
  7. Tighten
    Tighten the rear timing belt cover threaded pin to 10 N·m (89 lb in).

    Important: The upper idler pulley (cams 1 and 2) and the lower idler puller (cams 3 and 4) use different bolts and spacers of different thicknesses. The upper idler pulley uses a narrow 5 mm (0.2 in) thick spacer and a black bolt. The lower idler puller uses a 11 mm (0.4 in) thick spacer and a silver bolt.

    Important: Tighten the timing belt idler pulley bolt until snug. After the final timing belt adjustments are made, the bolt will be tightened to specifications.

  8. Install both timing belt idler pulleys.
  9. Tighten
    Tighten the idler pulley fastener to 40 N·m (30 lb ft).


    Object Number: 894875  Size: SH
  10. Install the timing belt tensioner bracket.
  11. Install the timing belt tensioner bracket bolts.
  12. Tighten
    Tighten the timing belt tensioner bracket bolt to 40 N·m (30 lb ft).


    Object Number: 894904  Size: SH
  13. Install the camshaft gears and new bolts using the camshaft lock kit tools J 42069-1 and J 42069-2 within the J 42069 to lock the gears when tightening the gear bolts.
  14. Tighten
    Tighten the camshaft gear bolt to 50 N·m (37 lb ft) plus 60 degrees plus 15 degrees.


    Object Number: 894187  Size: SH
  15. Install and adjust the timing belt. Refer to Timing Belt Replacement .

  16. Object Number: 894303  Size: SH
  17. Install the front timing belt cover.
  18. Install the front timing belt cover bolts.
  19. Tighten
    Tighten the front timing belt cover bolt to 8 N·m (71 lb in).


    Object Number: 894285  Size: SH
  20. Install the intake air resonator.
  21. Reconnect the negative battery cable.
  22. Tighten
    Tighten the battery terminal bolts to 17 N·m (13 lb ft).