Rocker Arm Assembly: Service and Repair

Valve Rocker Arm and Push Rod Replacement
Removal Procedure

Important: 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.





1. Remove the valve rocker arm cover(s).
2. Loosen the valve rocker arm bolts.
3. Remove the rocker arms.
4. Remove the pushrods.
^ The intake push rods measure 147.51 mm (5.81 inch).
^ The exhaust push rods measure 154.87 mm (6.1 inch).

Installation Procedure





1. Coat the ends of the pushrods using prelube GM P/N 12345501 (Canadian P/N 992704) or equivalent.
2. Install the pushrods.
^ The intake pushrods are identified with yellow stripes.
^ The exhaust pushrods are identified with blue stripes.

3. Ensure that the pushrods seat in the lifter bore.
4. Coat the rocker arm friction surfaces using prelube GM P/N 12345501 (Canadian P/N 992704) or equivalent.

5. Important: Shims (88894006) may be required under the valve rocker arm pedestals if reconditioning has been performed on the cylinder head or its components.

Install the rocker arms.

Notice: Refer to Fastener Notice.

6. Install the rocker arm bolts.
Tighten the bolts to 34 Nm (25 ft. lbs.).
7. Install the valve rocker arm cover(s).