toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Positive Crankcase Ventilation Valve|Testing and Inspection|Page 3074 > < PCV Valve Hose|Testing and Inspection
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Positive Crankcase Ventilation Valve: Testing and Inspection

PCV VALVE 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

Positive Crankcase Ventilation Valve|Testing and Inspection|Page 3074 > < PCV Valve Hose|Testing and Inspection