Valve Rocker Arm, Shaft, And Push Rod: Inspection

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Clean the parts in solvent. Wear protective safety glasses and gloves. Blow-dry the parts with compressed air.
Inspect the valve rocker arms and shafts at the mating surfaces, in order to ensure that they are smooth and without scoring damage.
Inspect the valve rocker arm areas which contact the valve stems and the sockets which contact the valve pushrods. These areas should be smooth and without damage or wear.
Determine if the valve pushrods are bent by rolling the pushrod on a flat surface. Replace the pushrod if the pushrod is bent.
Inspect the ends of the valve pushrods for scoring or roughness. Make sure the oil passages in the valve pushrods are clear. Replace any damaged parts.