GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Note: Place the valve train components in a rack in order to ensure that the components are installed in the same location from which they were removed.


    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. Loosen the valve 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 push rods measure 147.51 mm (5.81 in).
    • The exhaust push rods measure 154.87 mm (6.1 in).
  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. Note: Shims (88894006) may be required under the valve rocker arm pedestals if reconditioning has been performed on the cylinder head or its components.

  7. Install the rocker arms.
  8. Caution: Refer to Fastener Caution in the Preface section.

  9. Install the rocker arm bolts.
  10. Tighten
    Tighten the bolts to 34 N·m (25 lb ft).

  11. Install the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement - Left Side or Valve Rocker Arm Cover Replacement - Right Side.