Positive Crankcase Ventilation: Testing and Inspection

Fig. 36 PCV valve. 4-110/1.8L diesel engine:

1. Check hoses for deterioration and blockage, and replace as needed.
2. On L-4 engines, remove PCV and cam covers:
a. Check PCV valve diaphragm, spring and housing for dirt or damage, Fig. 36, and repair as needed.
b. Check baffle in cam cover and clean as needed.
3. On V6 and V8 engines, check for plugged CDR valve or breather, check CDR for binding or sticking, and replace as needed.