Positive Crankcase Ventilation: Testing and Inspection

PCV Valve Inspection

1. Remove the engine cover.

2. Check the PCV valve (A), the hoses (B), and the connections for leaks or restrictions.






3. At idle, listen to the PCV valve (A) with a stethoscope as you lightly pinch the PCV hose (B) with your fingers or pliers several times. Each time the hose is pinched, the valve should click.

If there is no clicking sound, check the PCV valve collar and O-rings for cracks or damage. If they are OK, replace the PCV valve Service and Repair and recheck.