GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 7872 Dial Indicator Set

For equivalent regional tools, refer to Special Tools.


    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. Caution: Refer to Fastener Caution in the Preface section.

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

  8. 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 and tighten to 9 N·m (80 lb in).

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

  14. Object Number: 663816  Size: SH
  15. Measure the camshaft end play with J 7872 set .
  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.