Severe Oil Blow By, need help fast!

[TT91]

I wrapped some paper towels around my breathers and went for a 3 mile highway cruise, under boost a few times, maybe 4-5 psi. This is what the towels look like afterwards, soaked in oil. I have a breather on each valve cover, and the PCV is plugged. I am supposed to be getting tuned in the morning and I would like to fix this for the time being. Any help???

 

[bill302]

run a compression test and post results. to rule out possible bad rings, cracked piston ect.

 

[TT91]

its due to crank case pressure from being user boost. Oil is coming frmo the heads, anyone else? Just looking for a quick fix.

 

[90mustangGT]

If you have one, hold an airhold (such as when changing valve springs, holds air pressure in the combustion chamber) and see where the air is leaking to. If it's comming from the heads it is most likely a bad valve seal would be the first place I would look.

 

[bill302]

i copied this out of a thread link is at bottom don't know but hope it helps.



1) i installed a chack valve between the upper intake and the pcv so that under boost, no pressure would get past the pcv valve and into the crankcase. 2) i installed an open element breather that replaces the stock oil fill cap on my stock valve covers. i have not seen your valve covers, but i know they are not what the factory provided, so, if you choose to get an open breather, the opening in the valve cover MUST have a baffle.


THANKS FOR THE HELP yea the friggin techs at vortech sent me in the wrong direction. they had me eliminate my pcv and like you said the supercharger was boosting my crankcase forcing oil into my manifold aswell . put my pcv back in and threw there pcv bypass kit away . motor runs great no oil leak no dipstick poppin out . so my problem is solved . now i need a msd box with a revv limiter so i dont blow my motor

http://www.corral.net/forums/showthread.php?t=707745&highlight=blow+supercharger

 

[TT91]

Thanks bill, Im confident that the motor has a tight seal. I just ran a copression check on cylinders 5-8, all reveal 125 psi and holding. I need to look into a check valve breather option.

 

[bluevenom867]

Put some baffles under your breathers....

 

[TT91]

Put some baffles under your breathers....

They have them. Compression test is 125 across the board. Ill be making some sort of evac system tomorrow.

 

[ExplodingGopher]

Holy **** that is bad, did you try new/different breathers? Oil drain holes in the heads clogged with something and not draining back into teh pan fast enough? IDK just saying but it does sound like you need a to re-evaluate your pcv system. Bill302, sounds like you may have hit it square on the head.

 

[bluevenom867]

They have them. Compression test is 125 across the board. Ill be making some sort of evac system tomorrow.

Hmm,then you could try putting a piece of tube under the breaters to raise them alittle.

Or you can get a breather tank,run hoses to the breather tank,and put an air/oil separator in between,with a line back to the oil pan.

Or,you could set-up a vacuum pump like we did and pick up some more power while fixing your problem.

 

[Rick 91GT]

Wow that is excessive.... Are you running open element breathers of closed breathers?

 

[bill302]

well tommorrow is here how did it go?

 

[Black1987Stang]

Wouldnt it have to be from something recent, i no u had put a few miles on the motor and u didnt say anything about doing it them, but last i remember u tore heads off and had to get new injectors and that u got a new hood. And didnt u get new valve covers too? or maybe that was someone else. My friends Blown Notch has a Supra pcv valve in place of his or something like that to prevent the blowby while under boost like someone else said, and he is running an open breather on the oil filler cap. he also has a oil seperator he got from home depot to get moisture out of air tool systems and put it in his pcv line and it helped alot.

 

[Michael Yount]

Put even more paper towels and rags around the breathers.....

What happened - did you solve it? You're SURE you're not applying boost to the crankcase anywhere?

 

[04sleeper]

My friend is having a similar issue with his YSI-331 combo running 18 psi.

Let us know how it turns out.

With my car I can just get away with the $20 Home Depot oil seperator setup.

 

[Rick 91GT]

I'd run a vac pump on your buddies car, and Mike I think it is something you should look into as well...you can run them with a conventional ring pack.

 

[04sleeper]

Thanks Rick. I'll let him know. I think it will take something like that to make it right.

He put on a Steeda seperator and it was full after 2 pulls on the dyno.

He was so mad he took it off and threw it into the garbage.

He just has the PCV blocked off right now and a breather on the driver side VC.

 

[TT91]

Installed the oil filter underneath the pcv valve(i didnt even know they existed), plugged the valve covers and installed a oil seperator too, no more problem.

 

[TT91]

This was after a few boosted runs around town. Works nice.

 

[04sleeper]

Hey Mike. Don't leave the filter in it. It will dissenigrate with synthetic oil and works just as well without it.