Valve Rocker Arm and Push Rods Cleaning and Inspection

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Parts that are to be used again must be marked, sorted or organized for assembly.

Mark, sort, or organize the components for assembly. Refer to SEPARATING PARTS .
Clean the components with cleaning solvent.
CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
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.

Fig 1: Inspecting Valve Rocker Arm Pushrod Sockets And Valve Stem Mating Surfaces
Courtesy of GENERAL MOTORS CORP.
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.

Fig 2: Inspecting Pushrods
Courtesy of GENERAL MOTORS CORP.
Inspect the pivot supports for cracks, wear, or other damage.

Fig 3: Inspecting Pivot Supports
Courtesy of GENERAL MOTORS CORP.