GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • EN 46105 Camshaft Holding Tool
    • EN 46111 Crankshaft Rotation Socket

    Object Number: 946116  Size: SH

    Important: There should be no need to rotate the camshaft more than 10 degrees. Using the hex cast into the camshaft rotate the camshaft in order to install the EN 46105 .

  1. Install the EN 46105-1 onto the rear of the left camshafts.
  2. Important: All camshafts must be locked in place before installation of any camshaft drive chains.

  3. Ensure that the EN 46105-1 is fully seated onto the camshafts.

  4. Object Number: 1306286  Size: SH
  5. Ensure that the crankshaft is in the stage one timing drive assembly position using the EN 46111 . Refer to Camshaft Timing Drive Chain Alignment Diagram Stage One.

  6. Object Number: 902828  Size: SH
  7. Install the left secondary camshaft drive chain.

  8. Object Number: 1306317  Size: SH
  9. Place the left secondary camshaft drive chain around the inner sprocket of the left camshaft intermediate drive chain idler with the timing camshaft drive chain link (1) aligned to the alignment access hole (2) made in the left camshaft intermediate drive chain idler outer sprocket.

  10. Object Number: 1306318  Size: SH
  11. Wrap the secondary camshaft drive chain around both left actuator drive sprockets.
  12. Ensure there are 7 links (1) between the timing camshaft drive chain links for the camshaft position actuator sprockets.

  13. Object Number: 1306320  Size: SH
  14. Align the left exhaust camshaft position actuator sprocket alignment circle mark (2) with the timing camshaft drive chain link (1).

  15. Object Number: 1306322  Size: SH
  16. Align the left intake camshaft position actuator sprocket alignment circle mark (1) with the timing camshaft drive chain link (2).

  17. Object Number: 1306323  Size: SH
  18. There will be 18 links (1) between the left camshaft intermediate drive chain idler timing secondary camshaft drive chain link and each left camshaft position actuator sprocket timing secondary camshaft drive chain link.