Rocker Arm Assembly Covers: 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.
Check rocker arms and shafts for scoring or other damage. Check push rods for bending, scoring or roughness. Check valve lifter guides and retainers for damage. Check oil passages in push rods for obstructions.