GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1557679  Size: SH
  1. Remove the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement - Left Side or Valve Rocker Arm Cover Replacement - Right Side.
  2. Remove the rocker arm bolts.
  3. Remove the rocker arms.
  4. Remove the pushrods.
  5. • The intake push rods measure 147.51 mm (5.81 in).
    • The exhaust push rods measure 154.87 mm (6.1 in).

Installation Procedure


    Object Number: 1557679  Size: SH
  1. Coat the ends of the pushrods using prelube. Refer to Adhesives, Fluids, Lubricants, and Sealers.
  2. Install the pushrods.
  3. • The intake pushrods are identified with yellow stripes.
    • The exhaust pushrods are identified with green stripes.
  4. Ensure that the pushrods seat in the lifter bore.
  5. Coat the rocker arm friction surfaces using prelube. Refer to Adhesives, Fluids, Lubricants, and Sealers.
  6. Install the rocker arms.
  7. Caution: Refer to Fastener Caution in the Preface section.

  8. Install the rocker arm bolts and tighten to 34 N·m (25 lb ft).
  9. Install the valve rocker covers. Refer to Valve Rocker Arm Cover Replacement - Left Side or Valve Rocker Arm Cover Replacement - Right Side.