RoadRunner1970
Well-Known Member
Can anyone verify the correct oil breather for a 1970 Road Runner 440-6 car? Should it be the single nipple or double nipple? Thanks
My origional 1970 RS23V0A GTX breather fitting on the right (passenger side valve cover) has one (1) fitting that connects to the hose leading to the air filter base fitting.
CAP (Cleaner Air Package) or CAS (Cleaner Air System) cars used breather fitting with three (3) fittings: one for the hose to the air filter base as before, the second fitting connects yo the middle carb bowl vent, snd the third fitting connects to the fuel tank vent line which goes to the vapor seperator stand pipe near the fuel tank.
Usually, in 1970, 49 states cars used the single fitting breather and California cars used 3 fitting breather. All 1971 models used 3, as emission regulations started to increase. GM and Ford used activated carbon canister systems for storing fuel vspors. while Mopar used the engine crankcase for vapor storage. These stored vapors were purged thru the PCV system when the engine was running. ......FYI
Bob Renton