GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1579319  Size: SH

    Important: Some models use a second design inverted tooth timing drive system. The second design drive system can be used in place of the first design roller timing system but all of the following components must be changed to the second design:

       • Primary timing drive chain
       • Crankshaft sprocket
       • Intermediate drive shaft idler left and right
    Refer to Camshaft Timing Drive Design Identification

  1. Ensure that the right camshaft intermediate drive chain idler (1) is being installed. The recessed hub (4) and the smaller sprocket of the right camshaft intermediate drive chain idler is installed outward. The raised hub and the larger sprocket of the right camshaft intermediate drive chain idler is installed towards the block.

  2. Object Number: 1579010  Size: SH
  3. Install the right camshaft intermediate drive chain idler.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the camshaft intermediate drive chain idler bolt.
  6. Tighten
    Tighten the camshaft intermediate drive chain idler bolt to 58 N·m (43 lb ft).