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oil in valve cover breather

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silver3

New member
i have a valve cover breather and a catch can, can anyone suggest a way to minimize the oil coming out of the valve cover breather? or is that just normal?
 


Awww good one turbo makes since. From what I can figure oil on it could just be the way it splashes up there....rockers and all that **** there
 


oh ok i can remove the breather? i didnt think i could but ok i will try that. my valve cover breather is soaked.
 
some people drill a hole in the oil fill neck just below the cap... oil_fill_1.jpg this kinda thing... i know diff engine. but then drill a hole and put a barb fitting on it and run that hose to the intake/ air filter area that does not see boost.

well i guess if your maf is on the boost side this doesnt matter either.... but you can now use this setup to connect to the catch can and vent the air there. If your seeing a bunch of oil it is possible you have lots of blow by and that is why you are seeing the oil... or part of your original pcv system is still trying to work and you are pushing boost into the crank case.
 
ok . i currently have the catch can connected to the nipple where the pcv is at on the uim right by the intake (UIM side). so drill a hole under the cap, barb it and then connect that to the intake ( maf is after the turbo) then use the catch can to it? am i getting a t barb fitting? im sorry for the noob questions just have never done it oor seen it this way
 
i run 2 front valve covers, 2 breathers, on my twin charged setup. both breathers have a piece of foam rubber in them to keep any oil from coming out. Works like a charm. havent seen a drip.
 


I have a stock breather setup using a LS1 fill adapter, works fine. Most the oil I see come out of them is rocker related, so moving the breather away from the rockers helps.

i also run 2 breathers.
 
ahh, never thought it could be rocker related. i removed the valve cover breather and just using the catch can now. had to reroute it but we shall see how it goes.
 
So I put the stock valve cover on and after driving for 30 min I had white smoke coming out the exhaust..a lot of it. With the valve breather it didn't happen. So I put the breather back on till I get some suggestions on why it's doing it. Any ideas?
 
darkhorizon said:
I have a stock breather setup using a LS1 fill adapter, works fine. Most the oil I see come out of them is rocker related, so moving the breather away from the rockers helps.

i also run 2 breathers.
Click to expand...

I believe at one time, you were running a vac pump on your Fiero. Did you decide to get away from that?
 


silver3 said:
So I put the stock valve cover on and after driving for 30 min I had white smoke coming out the exhaust..a lot of it. With the valve breather it didn't happen. So I put the breather back on till I get some suggestions on why it's doing it. Any ideas?
Click to expand...

Blow-by...crankcase pressure is building up and forcing past the rings into the combustion chambers.
 
danomite02 said:
i run 2 front valve covers, 2 breathers, on my twin charged setup. both breathers have a piece of foam rubber in them to keep any oil from coming out. Works like a charm. havent seen a drip.
Click to expand...
Yup! I only run one valve cover breather and have a cheap absorbant sponge type head/sweat band with the elastic cut off folded in half and tucked inside the VC breather...works great for my setup.
 
dont know if the turbo caused the blow by, but when that happens the oil ring on the piston is dead in a N/A engine.

i had this in a old car, the dip stick was getting blown out of the tube, and spitting oil up the tube as well. the pcv tube was also full of oil.
 
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