Positive Crankcase Ventilation Valve: Testing and Inspection

Inspection

1. Warm up the engine to the normal operating temperature and run it at idle.





2. Disconnect the PCV valve with the ventilation hose from the cylinder head cover.
3. Block the PCV valve opening.
4. Verify that vacuum is felt.
5. Remove the PCV valve.





6. Blow through the valve from port (A) and verify that air comes out of port (B).
7. Blow through the valve from port (B) and verify that no air comes out of port (A).
8. Replace the PCV valve if necessary.