Positive Crankcase Ventilation: Testing and Inspection

PCV VALVE INSPECTION

1. Remove PCV valve.
2. Attach clean hose to PCV valve.

Positive Crankcase Ventilation (PCV) Valve Testing:

3. Blow air from cylinder head side.
Check that air passes through easily.

NOTICE: Do not suck air through the valve. Petroleum substances Inside the valve are harmful.

Positive Crankcase Ventilation (PCV) Valve Testing:

4. Blow air from intake manifold side.
Check that air passes through with difficulty.
If the PCV valve fails either of the checks. replace it.
5. Reinstall PCV valve.

PCV HOSES AND CONNECTIONS

Fig. 71 PCV System Inspection Points:

Visually inspect hoses, connections and gaskets.
Check for cracks, leaks or damage.