Crankcase Ventilation Systems (Open Systems): Description: Notes

1961-62 California cars, 1963-65 cars, except 1963 6 Cyl. engines, and 1966-67 non-California cars use an "open" crankcase ventilation, "Type 1". The main elements of the positive ventilation system are a vented breather cap and a hose connecting crankcase ventilation outlet to a spring-loaded regulator valve.