1977-79 Models

Blow-by gases are led through a hose from the front of rocker arm cover into the air cleaner, and through another hose at rear of rocker arm cover into intake manifold through the fixed orifice. At part throttle operation, blow-by gas is drawn from rear of rocker arm cover into the intake manifold with fresh air entering from the air cleaner. At wide open throttle, blow-by gas is drawn from rear of rocker arm cover to intake manifold and from front of cover to air cleaner dirty side. Oil content in blow-by gas is separate by centrifugal force of the camshaft chain sprocket, or by the baffle plate in rocker arm cover, and the remaining oil is filtered by the steel-wool provided at blow-by gas inlet port inside of air cleaner.