Positive Crankcase Ventilation: Testing and Inspection

PCV SYSTEM INSPECTION





1. Remove PCV valve.
(a) Disconnect the PCV hose from the PCV valve.
(b) Remove the PCV valve.
2. Install clean hose to PCV valve.
3. Inspect PCV valve operation.





(a) Blow air into the cylinder head cover side, and check that air passes through easily.

CAUTION: Do not suck air through the valve. Petroleum substances inside the valve are harmful.





(b) Blow air into the air intake chamber side, and check that air passes through with difficulty.





(c) Blow air into the air intake chamber side when lift up the inside valve, and check that there is a strong resistance to air flow.
If operation is not as specified, replace the PCV valve.
4. Remove clean hose from PCV valve.
5. Reinstall PCV valve.