Positive Crankcase Ventilation: Testing and Inspection

1. INSPECT PCV VALVE





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





1. 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.





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





3. 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.
d. Remove the clean hose from the PCV valve.
e. Reinstall the PCV valve.





2. INSPECT HOSES, CONNECTIONS AND GASKETS
Visually check for cracks, leaks or damage.