How important is an oil breather.

[stangboy]

I was wondering how important it is to have a breather because I took the tube that goes from the intake tube to the oil filler tube. I don't like having oil in my intake tube, throttlebody, intake, and everywhere in the induction system. So, I just capped off the intake tube and oil filler tube. Will this hurt anything or should I get a breather cap?

 

[wytstang]

The reason it is their (the air tube) is to help relieve or give the excessive combustion air (crankcase pressure) a place to go. So it recycles it back through the engine (emission reasons) if too much combustion builds up and has no where to go it WILL find a way to escape i.e. pvc valve (will start sucking oil up through the intake) or oil dipstick tube will keep popping out. I hope is makes sense.

 

[stangboy]

Yeah, I understand. So what if I put a small hole in the vacuum cap that I put on the part on the oil fill tube?.....at least until I get a breather cap.

 

[baglock1]

I don't like having oil in my intake tube, throttlebody, intake, and everywhere in the induction system.

Were you actually having a oil migration problem? Do you have baffled valve covers?

 

[stangboy]

Were you actually having a oil migration problem? Do you have baffled valve covers?

No, I had to grind that out so the fox body valvecover could clear my roller rockers.

 

[HISSIN50]

as said, PCV flow is bi-directional. the reason for the oil-filler to TB hose is that is uses metered air. if you run a straight breather you will be using unmetered air. do you have forced induction? that is the only time i like to see a breather (though many run them).

what i would recommend for an alternative (if the only reason you are workin on this is because of the oil in the intake): run a catch can and a filter. some have made catch cans from soup cans and run fuel filters for the filtering medium. or you can get a dedicated catch can.

come to think of it, i think this site has a tech article on how to do it.

good luck.