Positive Crankcase Ventilation: Testing and Inspection

PCV Valve Location:

SYSTEM INSPECTION

1. Disconnect the ventilation hose from the positive crankcase ventilation (PCV) valve. Remove the PCV valve from the rocker cover and then connect the ventilation hose to the PCV valve.


2. While the engine is at idle place a finger over the open end of the PCV valve and verify that vacuum is felt. Note that it is possible to feel the internal plunger move when a finger is placed over the end of the valve.
3. If no vacuum is felt clean the PCV hose with a suitable solvent and if necessary replace the PCV valve.
4. Check all hoses for proper connections.
5. When installing the PCV valve torque to 7.2 ft-lbs (10 Nm).


PCV VALVE INSPECTION

1. Remove the PCV valve.
2. Insert a thin rod into the threaded end of the valve and verify that the valve plunger moves freely.
3. If the valve does not operate freely or is clogged, clean or replace as needed.
4. When installing the PCV valve torque to 7.2 ft-lbs (10 Nm).