1500 4x4 Pickup V8-318 5.2L Magnum (1994)
Positive Crankcase Ventilation Valve: Testing and Inspection
PCV Valve Vacuum Check
1. With engine idling, remove PCV valve from rocker cover. If valve is not plugged, a hissing sound will be heard as air passes through the valve,
and a strong vacuum should be felt when a finger is placed over the inlet of the valve.
Crankcase Inlet Vacuum Check
2. Install the PCV valve, then remove crankcase inlet air cleaner. With engine idling, loosely hold a piece of stiff paper (such as a parts tag) over the
opening in the rocker arm cover. After allowing about a minute for the crankcase pressure to reduce, the paper should be drawn against the
opening in the rocker arm cover.