Previa Van LE 4WD L4-2438cc 2.4L DOHC SC MFI (1997)
Positive Crankcase Ventilation Valve: Testing and Inspection
PCV VALVE INSPECTION
1. Remove RH engine service hole cover. Refer to Engine.
2. Remove Positive Crankcase Ventilation (PCV) valve.
3. Install clean hose to PCV valve.
4. Inspect PCV valve operation.
(a) Blow into the cylinder head side, and check that air passes through easily.
WARNING: Do not suck air through the valve. Petroleum substances inside the valve are harmful.
(b) Blow air into the intake manifold side, and check that air passes through with difficulty.
If operation is not as specified, replace the PCV valve.
5. Remove clean hose from PCV valve.
6. Reinstall PCV valve.
7. Reinstall RH engine service hole cover.