Oil Blowing Out Of Valve Cover Vent

Have A Big Block Chev About 600hp, Do Not Drag This Car, But
When I Really Get Down On It Hard, Oil Blows Back Up Thru
The Breathers On The Valve Covers....i Was Wandering If There
Is A Cure For This, Other Than Just Slowing Up. Thanks Rd

Is your PCV valve working?

Do your covers have oil drippers?

if your using a valve cover with no baffles in them you will get that

I took a small piece of aluminum and bent it to fit under my breathers and drilled a small hole in my valve cover and riveted it in. When you install your breather you can't see the rivet and problem solved.

To much blow by. Question for the rest of you also. Does the PCV vent at Wide Open Throttle? or with 0-1 in of vaccuum at WOW will it not vent?

Quote:

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Originally Posted by Mikej

To much blow by. Question for the rest of you also. Does the PCV vent at Wide Open Throttle? or with 0-1 in of vaccuum at WOW will it not vent?

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built many bbc and if you do not have any baffles in the covers your going to get oil not to much blow by just a lack of any control of it . less the engine is hurt ? but it a very common with tall valve covers or any covers with no oil control . i do not use a pvc with big power engines if you not pulling a vaccum them the pcv is not going to work

running no vacuum or pcv, don't know what drippers are, suspect no
baffles in valve covers...good answers, would appreciate any other
info out there. r dobbs

Drippers.just another name for baffles

Drippers.just another name for baffles

Hmm, sorry for the studdering