GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 7872 Dial Indicator Set


    Object Number: 660540  Size: SH
  1. Install the camshaft thrust plate to the camshaft.
  2. Install the camshaft driven gear.
  3. Install a new camshaft driven gear bolt.
  4. Leave the bolt finger tight.


    Object Number: 663813  Size: SH
  5. Install the camshaft and gear assembly into the cylinder block, aligning the camshaft gear to the crankshaft gear as shown.
  6. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the camshaft thrust plate bolts.
  8. Tighten
    Tighten the camshaft thrust plate bolts to 22 N·m (16 lb ft).


    Object Number: 663091  Size: SH
  9. Install the camshaft position sensor exciter ring to the camshaft gear.
  10. Install the camshaft position sensor exciter ring bolts.
  11. Tighten
    Tighten the camshaft position sensor exciter ring bolts to 9 N·m (80 lb in).


    Object Number: 660539  Size: SH
  12. Block the crankshaft from turning using a wooden handle.
  13. Install the new camshaft gear bolt.
  14. Tighten
    Tighten the new camshaft gear bolt to 234 N·m (173 lb ft).


    Object Number: 663816  Size: SH
  15. Measure the camshaft end play with J 7872 .
  16. • The production value is 0.050-0.114 mm (0.0020-0.0045 in) and service limit is 0.2 mm (0.0079 in).
    • Replace the camshaft gear or the camshaft thrust plate if measured value exceeds the service limit.