PB 150 V8-318 5.2L VIN T 2-BBL (1983)
Positive Crankcase Ventilation: Testing and Inspection
Fig. 30 Checking PCV valve vacuum
Fig. 31 Checking vacuum at crankcase inlet filter (Typical). except 4 cylinder & V6-181 engines
1.
With engine running at idle, proceed as follows:
a. Remove PCV valve from rocker cover. If valve is not plugged, a hissing noise will be heard as air passes through the valve, and a strong
vacuum will be felt at the valve inlet, Fig. 30.
b. Reinstall PCV valve and remove crankcase inlet air filter. Loosely hold a piece of stiff paper over opening in rocker cover, Fig. 31. When
crankcase pressure decreases after approximately one minute, the paper should be drawn firmly against the opening.
2.
Stop engine and remove PCV valve. When valve is shaken, a clicking noise should be heard, indicating freedom of the valve mechanism.
3.
If system passes tests in steps 1 and 2, no further service is required. If not, replace PCV valve and recheck system. Never attempt to clean an
old PCV valve.
4.
If, after a new PCV valve has been installed, the paper is not drawn against crankcase inlet air cleaner opening in rocker cover, the ventilator hose
