GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 7872 Dial Indicator Set.


    Object Number: 663816  Size: SH
  1. Measure the camshaft end play using J 7872 .
  2. • The production value is 0.050-0.114 mm (0.002-0.0045 in) and service limit is 0.20 mm (0.008 in).
    • Replace the camshaft or the camshaft thrust plate if the measured value exceeds the service limit.

    Object Number: 660539  Size: SH
  3. Block the crankshaft from turning with a wooden handle.
  4. Loosen the camshaft gear bolt and leave the bolt finger tight.

  5. Object Number: 663091  Size: SH
  6. Remove the camshaft exciter ring bolts.
  7. Important: The 2-piece cam gear must be bolted together to prevent the spring tension from unloading upon removal.

  8. Remove the camshaft exciter ring.

  9. Object Number: 1650679  Size: SH
  10. Align the threaded hole with a suitable tool and install an exciter ring bolt to secure the spring tension.
  11. Remove the camshaft thrust plate bolts through the holes in the camshaft gear.

  12. Object Number: 663093  Size: SH
  13. Remove the camshaft with the camshaft gear attached.

  14. Object Number: 660540  Size: SH
  15. Remove the camshaft gear bolt and washer.
  16. Remove the camshaft gear.
  17. Remove the camshaft thrust plate.