Valve Rocker Arm Cover Cleaning and Inspection

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

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.

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

Fig 1: Removing Ignition Coil & Bracket Assembly, Bolts & Wire Harness
Courtesy of GENERAL MOTORS CORP.
Remove the ignition coil and bracket assembly, bolts, and wire harness from the right cover, if required.

Fig 2: Removing Ignition Coil & Bracket Assembly, Bolts & Wire Harness
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.

Fig 3: Removing Oil Fill Cap & Tube
Courtesy of GENERAL MOTORS CORP.
Remove the gaskets (1) from the covers.
Remove the cover mounting bolts, with grommets.
Cover mounting bolts and grommets that are not damaged may be used again during assembly.
Clean the covers in solvent.

Fig 4: Removing Gaskets From Covers
Courtesy of GENERAL MOTORS CORP.

WARNING: Wear safety glasses in order to avoid eye damage.
Dry the covers with compressed air.
Inspect the ventilation system passages for restrictions.
Inspect the gasket grooves for damage.
Inspect the coil bracket threaded bolt holes for damage or debris.

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