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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Engine Mechanical - 3.9L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Positive Crankcase Ventilation (PCV) Valve Cleaning and Inspection >> Inspection Procedure

Inspection Procedure

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: Identifying Positive Crankcase Ventilation (PCV) Valve
GM1578567Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: DO NOT attempt to remove the valve from the valve rocker arm cover, as damage may occur to the rocker arm valve cover. The positive crankcase ventilation (PCV) valve is a fixed orifice system.
  1. Flush the carbon from the PCV valve orifices (1) using solvent.
  2. Dry the PCV valve orifices using compressed air.
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