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2G Very small amount of oil from BoV with Catch Can

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PrimerPLus

10+ Year Contributor
1,158
20
Jul 28, 2011
Tokyo, Asia
I cleaned the car the other day and the engine bay area and today I was replacing a part because I got a random missfire code that keeps popping up. Replaced the Power Transistor, Cam sensor, and spark plugs. I didn't replace the plug wires or Coil pack as those are both fairly new. Measured ohms on the injectors all read 2.6 ohms, measured injector plugs, 12.2v on all of them with key on engine off.
If not success Ill have to check the egr, plug wires, coil pack - replace.

Sorry for the off topic. So as I was doing that, I noticed oil spray from the BoV. It had been just a little but noticeable. So I took off all my intercooler piping and found small line of oil in it here are some pictures, and the tub is what came out of the intercooler and piping.

The turbo has no shaft play still nice and tight, doesn't seem to be any oil coming out of the inlet or where the Jpipe connects.
I do have a Calan V3 catch can.
I noticed where I have my stock PCV that goes into the valve cover the hose seems to "sweat?" I can rub my finger across it and there is oil residue. I am using the stock pcv valve that goes into a check valve so there should be 0 leakage.

After looking at the pictures do you think it's anything to worry about?
Also if any input on the missfire let me know too thanks all.

J-Pipe
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Intercooler opening- side that goes to J-Pipe
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Upper Intercooler pipe - Throttle body area
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Turbo Inlet
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Turbo - Jpipe inlet
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Catch can setup
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all the oil from all the pipes and intercooler
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I hope those chunks in the last pic were already in the can when you used it and not from anything else, and the oil in the upper intercooler pipe looks pretty milky, do you drain your catch can ?

Does the oil dipstick pop up or do you notice smoking under deceleration, start up under hard accelleration ?

Initial guess is that the catch can needs to be drained out .....it looks like the catch is full and pushing oil through the vaccum hose connected to your turbo intake pipe that is pushing the oil through the system ..( check you intercooler I bet oil is in there also ) ....... second guess maybe the tubo seals are giving out, grab a seal kit and put new seals in or send to JusMX141 he does pretty decent work on journal bearing turbos.
 
Those chunks had me worried too. I picked one up and they basically dissolved in my hand. Not chunks like broken metal or anything. Yes I drain my catch can, it usually is mix of gas vapor, water, and some brown junk. It was drained just recently. But before that I drained it and it was extremely full, maybe that is blow over from that?

Oil dipstick has never blown out, no smoking or any burning of oil.
Most of the oil in that tub is from the intercooler, not a lot, but enough I was curious about it.

Justin rebuilt this turbo for me a year or 2 ago.
 
I run pretty much the same setup except I vent my catch can to atmosphere. *hint hint*

I also run a small Mishimoto sealed catch can on the PCV side w/ check valve which collects more than the catch can off the side of the VC.
 
I agree, the catch can really should be vented to the atmosphere .... for simplicity sake change the PCV valve and pick up a cheap breather filter all from local Parts house and see the results.
I would certainly clean out everything that has the oil residue...
 
I cleaned my piping all out and haven't noticed any oil yet from the bov.
I think it was just excess oil from catch can that got into the intake.
I will keep an eye on it though.
 
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