GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1947355  Size: SH

    Important: Note the removal sequence 1-4.

  1. Remove the 4 camshaft bearing support bolts.
  2. Release the bearing support by striking it gently with a plastic hammer.
  3. Remove the 1st camshaft bearing support.

  4. Object Number: 1947352  Size: SH

    Important: Mark the exhaust camshaft bearing caps before removal.

  5. Remove the camshaft bearing caps 2-5, working from outside to inside in a spiral, in steps of 1/2 up to 1 turn.
  6. Remove the camshaft bearing cover from the cylinder head.
  7. Remove the exhaust camshaft.
  8. Important: Mark the intake camshaft bearing caps before removal.

  9. Remove the camshaft bearing caps 2-5, working from outside to inside in a spiral, in steps of 1/2 up to 1 turn.
  10. Remove the camshaft bearing cover from the cylinder head.
  11. Remove the intake camshaft.
  12. Remove the seal rings from the camshafts.

  13. Object Number: 1945785  Size: SH
  14. Unscrew the closure bolt (2) of the intake camshaft adjuster (1) or the closure bolt (4) of the exhaust camshaft adjuster (3).

  15. Object Number: 1945787  Size: SH
  16. Detach the intake camshaft adjuster (1) or exhaust camshaft adjuster (3).
  17.    Important: A second person is required.

    • Counterhold against hexagon of corresponding camshaft with an open-ended wrench.
    • Unscrew the bolt (2) or (4).