GM Service Manual Online
For 1990-2009 cars only
  1. Clean the components with cleaning solvent.
  2. Caution: Wear safety glasses in order to avoid eye damage.

  3. Dry the components with compressed air.

  4. Object Number: 156158  Size: SH
  5. Inspect the timing chain for binding or wear.

  6. Object Number: 188097  Size: SH
  7. Inspect the camshaft and crankshaft sprockets for:
  8. • Worn teeth (1)
    • Damaged teeth (2)
    • Chipped teeth (3)
    • Worn valleys between the sprocket teeth

    Object Number: 156150  Size: SH
  9. Inspect the crankshaft sprocket keyway for wear.
  10. Inspect the crankshaft sprocket oil pump drive splines for wear.

  11. Object Number: 1272950  Size: SH
  12. Inspect the chain dampener (232) for the following conditions:
  13. • Loose metal inserts (1)
    • Cracking (2) in the chain contact area
    • Excessive grooves (3) in the chain contact area
    • Grooves 1 mm (0.040 in) or less in depth are to be considered normal wear.