Positive Crankcase Ventilation: Testing and Inspection

PCV (Positive Crankcase Ventilation) VALVE
With engine running at idle, remove PCV valve from breather separator. A properly working valve makes a hissing noise as air passes through it. A strong vacuum should be felt immediately when a finger is placed over the valve inlet.




VENTILATION HOSE
1. Check hoses and hose connections for leaks.
2 .Disconnect all hoses and clean with compressed air. If any hose cannot be freed of obstructions, replace.