GM Service Manual Online
For 1990-2009 cars only

    Object Number: 2033824  Size: SH
  1. Measure the camshaft lift.
  2. Replace the camshaft if the measured value is not as specified.
  3. Specification
    The specification is 46.3 mm (1.8228 in).


    Object Number: 1224657  Size: SH
  4. Measure the outer diameter of each journal (1) at the 4 different places.
  5. Replace the camshaft if the measured value is not as specified.
  6. Specification
    The specification is 27.939-27.960 mm (1.1000-1.1008 in).


    Object Number: 1224655  Size: SH
  7. Measure the straightness of the camshaft using a dial gage.
  8. Replace the camshaft if the measured value is over the specified limit.
  9. Specification
    The specification limit is 0.04 mm (0.0016 in).


    Object Number: 2049756  Size: SH
  10. Measure the camshaft endplay using a dial gage.
  11. Replace the camshaft if the measured value is over the specified limit.
  12. Specification
    The specification limit is 0.130-.215 mm (0.0051-.0085 in).


    Object Number: 2049760  Size: SH
  13. Measure the inner diameter of the cylinder head journal at the 2 places.
  14. Specification
    The specification limit is 28.000-28.021 mm (1.1024-1.1032 in).

  15. If necessary, replace cylinder head.