Positive Crankcase Ventilation: Description and Operation

Crankcase Ventilation

The V8 engine is ventilated through a part load and a full load breather.

The part load breather is a flexible composite hose connected between the PCV (positive crankcase ventilation) valve mounted above the oil separator in the bank A camshaft cover and the induction elbow. The PCV (positive crankcase ventilation) valve prevents reverse flow into the crankcase.





The full load breather is a flexible hose connected between the oil separator in the bank B camshaft cover and the air intake duct.

The ends of the breather hoses incorporate quick release connectors.





The oil separators consist of wire gauze packed into an open ended enclosure below the breather outlet.