GM Service Manual Online
For 1990-2009 cars only

    Object Number: 412167  Size: SH
  1. Remove the upper timing chain guide bolts.
  2. Remove the upper timing chain guide.

  3. Object Number: 412158  Size: SH

    Important: The timing chain tensioner must be removed to unload chain tension before the timing chain is removed.

  4. Remove the timing chain tensioner plunger.

  5. Object Number: 412168  Size: SH
  6. Locate hex on the exhaust camshaft and hold with a wrench.
  7. Remove the exhaust camshaft bolt and the exhaust camshaft sprocket.
  8. Discard the bolt.


    Object Number: 412160  Size: SH
  9. Remove the adjustable timing chain guide bolt.
  10. Remove the adjustable timing chain guide.

  11. Object Number: 412164  Size: SH
  12. Remove the plug to gain access to the fixed timing chain guide bolt.

  13. Object Number: 412165  Size: SH
  14. Remove the fixed timing chain guide bolts.
  15. Remove the fixed timing chain guide.

  16. Object Number: 412169  Size: SH
  17. Locate hex on the intake camshaft and hold with a wrench.
  18. Remove the intake camshaft sprocket bolt, the intake camshaft sprocket and the timing chain through the top of the cylinder head.
  19. Discard the bolt.


    Object Number: 467381  Size: SH
  20. Remove the crankshaft sprocket.

  21. Object Number: 412200  Size: SH
  22. Remove the oil nozzle and bolt.

    Object Number: 412167  Size: SH
  1. Remove the upper timing chain guide.

  2. Object Number: 412158  Size: SH

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

  3. Remove the timing chain tensioner plunger.

  4. Object Number: 412168  Size: SH
  5. Locate hex on the exhaust camshaft and hold with an appropriate size wrench.
  6. Remove the exhaust cam bolt and the exhaust cam sprocket.
  7. Discard the bolt.


    Object Number: 412160  Size: SH
  8. Remove the adjustable timing chain guide.

  9. Object Number: 412164  Size: SH
  10. Remove the plug to gain access to the fixed timing chain guide bolt.

  11. Object Number: 412165  Size: SH
  12. Remove the fixed timing chain guide.

  13. Object Number: 412169  Size: SH
  14. Locate hex on the intake camshaft and hold with an appropriate size wrench.
  15. Remove the intake cam sprocket bolt, the intake cam sprocket and the timing chain through the top of the cylinder head.
  16. Discard the bolt.


    Object Number: 467381  Size: SH
  17. Remove the crankshaft sprocket.

  18. Object Number: 412200  Size: SH
  19. Remove the oil nozzle and bolt.