Valve Rocker Arm and Push Rod Cleaning and Inspection
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Mark, sort, or organize the components for assembly. Refer to Separating Parts .
- Clean the components with cleaning solvent.
- Dry the components with compressed air.
- Inspect the valve rocker arms bearings (2) for binding or roughness.
- Inspect the valve rocker arm pushrod sockets (3) and valve stem mating surfaces (1). These surfaces should be smooth with no scoring or exceptional wear.
- Inspect the pushrods for worn or scored ends. These surfaces should be smooth with no scoring or exceptional wear.
- Inspect the pushrods for bends. Roll the pushrod on a flat surface to determine if the pushrod is bent.
- Inspect the pushrod oil passages for restrictions.
- Inspect the rocker arm pivot supports for cracks, wear, or other damage.
NOTE:
Parts that are to be used again must be marked, sorted or organized for assembly.
WARNING:
Refer to Safety Glasses and Compressed Air Warning .