Valve Rocker Arm Cover Cleaning and Inspection

WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Clean the valve rocker arm cover mating surface.
Clean the valve rocker arm cover. Remove all the sludge and the oil deposits.
Inspect the valve rocker arm cover for damage. Replace the valve rocker arm cover if any damage is found.

Fig 1: Cleaning And Inspecting Valve Rocker Arm Cover
Courtesy of GENERAL MOTORS CORP.