Hey guys, I was adjusting my Vortech's belt and I noticed that oil is being blown out of the BOV. It’s not a lot but enough to be noticed. Is this normal?

Also when I changed my BOV's from the stock to the Greddy type-s and back to the stock I also noticed oil in the intercooler pipes at the end where the two pipes come together. I hope this is normal. Thanks...

 

DBZ33: Some oil can be normal from the PCV running back into the intake... however if there is a lot of it can be no good. Since the BOV is in a low spot I suppose thats where oil would collect... however a newer car with low miles like this I really wouldnt expect to see much at all if any.

If the pistons were worn around the ring lands and not providing good sealing then crankcase pressure would rise and oil vapors would be pushed thru the PCV system and back into the intake. There is a PCV breather hose that comes back into the air filter.

What I would do is disconnect that breather hose from the filter and inspect its interior. There should really only be an oily film on the inside of that hose at the most... liquid oil is no good and a common sign of worn pistons. If you keep that hose off and watch it while someone revs the motor, if there is visually a lot of oil vapor coming out than that is horrible news.

If there is no liquid oil in the PCV system, then the only other way excessive oil could make it in the intake is thru the supercharger. I am not sure about superchargers, but turbochargers with poor seals will sometimes let oil in the intake... but they typically let it in the exhaust. Given, there is no exhaust side of a supercharger... perhaps there is a worn seal in there pushing oil into the intake tho.

The only way to know for sure is to compression and leakdown test the motor to see if there are any signs of poor ring sealing. Poor ring sealing would be a result of the pistons and or rings being damaged/worn prematurely... which could happen from prolonged exposure to excessive heat/friction, or damage from pre-ignition/detonation in the cylinders.

Excessive heat could be caused from lean burn conditions... rings and cylinder walls can get worn from running too rich as well as the excessive fuel can wash away the protective coating of oil off the cylinder hone. Pre-ignition and detonation can come from a combination of many things like hot intake temps, too much ignition timing advance, too much heat in the combustion chamber (not running rich enough), etc.

Lets hope that none of this is the case, and that its just a little PCV vapor collecting.

-Charles

 

Is there a seal in the Vortec that prevents the engine oil from getting into thr S/C discharge.?

 

i wish i knew... the internal construction of a centrifigal supercharger is one thing that I never looked into.

 

Thanks everyone. I hope it’s not the piston rings yet!! Hey Charles I have to set a time to come see you and put the test pipes in and do this comp and leak down test. Also great dyno # you posted earlier. That’s just sick for the psi you are running.