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Valve Rocker Arm Cover Cleaning and Inspection

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Cleaning Valve Rocker Arm Covers
    GM315710Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not attempt to remove the valve from the valve rocker arm cover. The positive crankcase ventilation (PCV) valve is a fixed orifice system. Attempting to remove the PCV valve may result in damage to the rocker arm valve cover.
  1. Remove all rubber grommets from the valve rocker arm covers.
  2. Inspect the rubber grommets, if cracked or torn replace.
    3. CAUTION: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.
  3. Clean the valve rocker arm covers with solvent.
  4. Flush the carbon from the PCV valve orifices (1) using solvent.
  5. Dry the PCV valve orifices using compressed air.
  6. Dry the valve rocker arm covers with compressed air.
  7. Inspect the valve rocker arm covers for damage and replace if necessary.
  8. Install all rubber grommets into the valve rocker arm covers.
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