I have a Greddy BOV and when I rev on the throttle it blows a huge amount of white, grayish smoke that floats up to the air. I thought the Bov was bad, but when I switch it with a friend HKS Bov it does the same. But afterwards it doesn't blow any more smokes.

Any help is needed....

 

The BOV will blow out oil.

 

yeah I know that too, but see this is quite alot of smoke oil that it is blowing.

 

car smoking? does it do it while the engine is semi cold? could be a turbo is leaking coolant witch is being heated and turns to mist/smoke with the BOV is venting.. could be a oil/coolant combo.... and what would make u thing a BOV would be bad because it vented smoke?...

 

so could it also be a sign of tired Turbos???

 

yes.. all a BOV does is vent whatever is in the charge pipes.

 

I have found that too much oil in the crankcase can cause the turbo's to suck oil back in through the oil outlet side, causing the blowoff valve & tube to blow out excess oil and vapor (smoke). Also with too much oil in the crankcase will cause excessive poofs of black smoke from the exhaust during boost and transition to secondary turbo (if sequential), I'm not sure if you are experiencing that though..