Originally Posted by viking
What is the purpose of an oil breather cap? Can I get away with out one? the reason i ask is i am going to put a nice air cleaner on and the one i like doesn't have a hook up for my oil breather cap. so what can i do just plug it off or what can i route the hose to?
Any advice is appreciated.
Your present system is referred to as a Closed PCV System, i.e. fresh air is filtered through the carburetor air cleaner before it enters the crankcase. Usually, aftermarket air cleaners have a knockout on the bottom plate to mount a breather asm still using the closed filler cap. Barring that, you need to obtain what is referred to as an Open PCV Sytem fill cap, i.e. there will be a filtering element in the filler cap itself and the fresh air tube is deleted.