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Inspection Procedure

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Locating Positive Crankcase Ventilation (PCV) System Components
    GM1462169Courtesy of GENERAL MOTORS CORP.
    CAUTION: Do not breathe the air through the EVAP component tubes or hoses. The fuel vapors inside the EVAP components may cause personal injury.
  1. Inspect the positive crankcase ventilation (PCV) valve (3), the hoses (1, 2), and all connections for leaks or restrictions. Repair as necessary.
  2. Start the engine.
    3. Fig 2: Inspecting Positive Crankcase Ventilation (PCV) System Using Mechanics Stethoscope
    GM1462168Courtesy of GENERAL MOTORS CORP.
  3. At idle, listen to the PCV valve (2) with a mechanics stethoscope (1) while lightly pinching the PCV hose (3) with your fingers or pliers. Perform this test several times. Each time the hose is pinched, the valve should make an audible click.
  4. If there is no click, inspect the PCV valve grommet for cracks or damage.
  5. If the grommet is OK, replace the PCV valve. Refer to Crankcase Ventilation Hoses/Pipes Replacement .
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