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Discussion Starter #1
Hi I have am running a stock y7 on 5 psi. I just changed the headgasket. When I'm in the boost my car blows oil out the crank case breather. I am running.a sealed catch can that both the PCv and crankcase breathe into. Any ideas on why this is happening. I'm still at 180 for compression.
 

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Hi I have am running a stock y7 on 5 psi. I just changed the headgasket. When I'm in the boost my car blows oil out the crank case breather. I am running.a sealed catch can that both the PCv and crankcase breathe into. Any ideas on why this is happening. I'm still at 180 for compression.
thats your problem

the crank case can not breathe into the can if its sealed :frown:
 

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Discussion Starter #3
The catch can vents back into the intake. Even before I had a breather on the crankcase and it still blew oil
 

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So your blowing oil from the crankcase into the catch can and then into the intake?

Is there a breather on your catch can?
 

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go to a fish tank store and buy an ass load of check valves install ten per vacuum line in sequence lmao , im not giving out advice to dumbass's google thats what its there for
 
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