Description & Operation

The crankcase ventilation system is designed to divert blow-by gases into the intake manifold to be burned by the engine. System is a closed type and consists of an oil separator (camshaft chain sprocket), positive crankcase ventilation valve and connecting hoses. System supplies fresh air to crankcase through the air cleaner. Inside crankcase, fresh air is mixed with blow-by gases and passes through PCV valve into intake manifold under normal driving conditions. Under heavy acceleration or high-speed driving, intake manifold vacuum decreases and blow-by gases exceed PCV valve capacity. The gases are then routed through breather hose into the carburetor and burned by the engine.