GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement

  2. Object Number: 3686  Size: SH
  3. Remove the valve rocker arms.
  4. Important: 

       • Inspect the valve rocker arm and ball surfaces for excessive wear and burrs. Replace if needed.
       • Make sure to keep parts in order. Parts must be put back from where they were removed.


    Object Number: 1963  Size: SH
  5. Remove the pushrods.
  6. Important: 

       • Check the pushrod for straightness. Roll the pushrod on a flat surface to determine if the pushrod is bent. Replace if necessary.
       • Inspect the pushrods for excessive wear. Replace if necessary.

Installation Procedure

  1. Install the pushrods.
  2. Important: When you install new rocker arms and new rocker arm balls, coat the mating surface with camshaft assembly lubricant or equivalent.


    Object Number: 1963  Size: SH

    Important: Make sure that the pushrod is seated properly in the valve lifter and the rocker arm to avoid possible engine damage.


    Object Number: 3686  Size: SH
  3. Install the valve rocker arms.
  4. Install the valve rocker arm balls.
  5. Important: Do not over tighten the rocker arm nuts

  6. Install the rocker arm nuts.
  7. Tighten
    Tighten the rocker arm nuts to 30 N·m (22 lb ft).

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  8. Install the valve rocker arm cover. Valve Rocker Arm Cover Replacement .