VandykeT/A

I was just wondering if their would be any harm/benefit of going to a breather in place of the oil fill cap. They're no way I'd try to remove my pcv system just curious what having both would do, if anything. Thanks

crainholio

iTrader: (2)

It would kill the vacuum in your crankcase, opening it to atmospheric pressure instead. It would also create a massive vacuum leak.

So you'd lose the benefit of crankcase vacuum to help ring sealing, while losing intake vacuum. With no upside in terms of engine performance.

VandykeT/A

Well thats a big negative then lol. Thanks

402GOAT

iTrader: (2)

i dont agree with that statement without knowing how your current pcv system is set up. for some people, a breather cap instead of the normal oil cap is the normal way to go.

with the ls6 valley cover vacuum can be held in the crackcase while running a breather on the oil cap.

DBShocker

but still there is no real benefit from having a breather on the car for performance and also you will start to get a lot of "peanut butter" color milky residue build up with a breather.

402GOAT

iTrader: (2)

I guess i should state that my car is not a daily driver. i run a breather on the drivers valve cover and the pass oil fill cap is a breather. i run my valley cover to a catch can then to the intake. this is how A LOT of people are set up like. probly also not daily drivers though.

VandykeT/A

I'm running the stock PCV system for a 02 with a catch can.

Blk98Vert

iTrader: (2)

I'd run catch cans over the breather. I redid my tubing and run a truck PCV valve and burn nothing.