Valve Rocker Arm Cover Cleaning and Inspection

IMPORTANT:

Do not use the valve rocker arm cover gasket again. Install a NEW gasket during assembly.
Remove the ignition coils before cleaning the cover in solvent. Do not submerge the ignition coils in solvent.
Do not remove the oil fill tube or crankcase vent valve grommet from the covers unless service is required.
If the oil fill tube or crankcase vent valve grommet have been removed from the rocker arm covers, install a NEW tube or grommet during assembly.

Fig 1: View Of Ignition Coil, Bracket Assembly, Wire Harness & Bolts (Left)

Courtesy of GENERAL MOTORS CORP.

Remove the ignition coil and bracket assembly, bolts, and wire harness from the left cover, if required.
Remove the ignition coil and bracket assembly, bolts, and wire harness from the right cover, if required.

Fig 2: View Of Ignition Coil, Bracket Assembly & Bolts (Right)
Courtesy of GENERAL MOTORS CORP.
Inspect the tube for a loose fit or damage.
Remove the oil fill cap and tube from the right cover, if required.

Fig 3: View Of Oil Fill Cap & Tube
Courtesy of GENERAL MOTORS CORP.
Remove the gaskets (504) from the covers.

Fig 4: View Of Valve Rocker Arm Cover Gasket
Courtesy of GENERAL MOTORS CORP.
Remove the cover mounting bolts, with grommets.

Fig 5: View Of Valve Rocker Arm Cover
Courtesy of GENERAL MOTORS CORP.

Cover mounting bolts and grommets that are not damaged may be used again during assembly.
Clean the covers in solvent.

CAUTION: Refer to Safety Glasses Caution .