GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 894944  Size: SH

    Important: The timing chain tensioner must be removed to unload the chain tension before the timing chain is removed. If it is not, the timing chain will become misaligned and it will be difficult to remove.

  1. Remove the upper timing chain guide.

  2. Object Number: 894951  Size: SH
  3. Remove the timing chain tensioner plunger.
  4. Locate the hex on the exhaust camshaft and hold with a 24 mm open-end wrench.

  5. Object Number: 894960  Size: SH
  6. Remove the exhaust cam bolt and exhaust cam sprocket. Discard the bolt.

  7. Object Number: 894967  Size: SH
  8. Remove the adjustable timing chain guide.

  9. Object Number: 894968  Size: SH
  10. Remove the plug to gain access to the fixed timing chain guide bolt.

  11. Object Number: 894969  Size: SH
  12. Remove the fixed timing chain guide.

  13. Object Number: 895205  Size: SH
  14. Locate the hex on the intake camshaft and hold with a 24 mm open-end wrench.
  15. Remove the intake cam sprocket bolt, the intake cam sprocket, and the timing chain through the top of the cylinder head. Discard the bolt.

  16. Object Number: 897597  Size: SH
  17. Remove the crankshaft sprocket.

  18. Object Number: 895210  Size: SH
  19. Remove the oil nozzle and bolt.