GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 42038 Camshaft Holding Fixture


    Object Number: 539971  Size: SH

    Important: DO NOT rotate the camshafts more than 10 degrees.

  1. Remove the J 42038 from the left cylinder head camshafts. Allow the camshaft lobes to find a neutral position by rotating each camshaft, if necessary.

  2. Object Number: 539980  Size: SH
  3. Observe the markings on the bearing caps. Each bearing cap is marked in order to identify its location. The markings have the following meanings:
  4. • The raised feature must always be oriented toward the outboard side of the engine.
    • The I indicates the intake camshaft.
    • The E indicates the exhaust camshaft.
    • The number indicates the journal position from the front of the engine.

    Object Number: 240803  Size: SH
  5. Remove the camshaft bearing cap bolts.
  6. Remove the camshaft bearing caps. The cap closest to the front of the engine is the thrust cap and must not be installed in another location.

  7. Object Number: 234441  Size: SH
  8. Lift the camshaft (1, 2) out of the cylinder head.
  9. Cover the camshaft with an oil soaked towel in order to prevent corrosion.