Positive Crankcase Ventilation Valve: Testing and Inspection

3UZ-FE EMISSION CONTROL: PCV VALVE: INSPECTION

INSPECTION

1. INSPECT VENTILATION VALVE SUB-ASSEMBLY
(a) Install a clean hose to the ventilation valve.
(b) Inspect operation of the ventilation valve.




(1) Blow air from the cylinder head side, and check that air passes through easily.
CAUTION:
Do not suck air through the valve. Petroleum substances remaining inside the valve are harmful.




(2) Blow air from the intake manifold side, and check that air passes through with difficulty.
If the operation is not as specified, replace the ventilation valve.
(c) Remove the clean hose from the ventilation valve.