Federal Models

System is designed to prevent blow-by gases from entering the atmosphere by routing them back into intake manifold and carburetor air cleaner. System is a closed type and consists of an oil separator (camshaft chain sprocket), rocker arm cover baffle plate, small fixed orifice and connecting hoses. At part throttle operation, blow-by gas is drawn from rear of rocker arm cover into intake manifold with fresh air entering from air cleaner. At wide open throttle, blow-by gas is drawn through both passages; from rear of rocker arm cover to intake manifold and from front of cover to air cleaner dirty side.