Emission Control Systems: Description and Operation

Engine Emission Control

Crankcase Ventilation

Crankcase Ventilation Component Location





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 and the induction elbow at the rear of the engine. The PCV (positive crankcase ventilation) valve prevents reverse flow into the crankcase.

PCV (positive crankcase ventilation) Valve





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