While it's rarely the turbo, it is possible.
If you don't have any vacuum source to your valve cover, catch can etc, no problem.
Any vacuum source from to your intake/turbo is suspect, if in fact there is one.
I reread and see you are thinking turbo oil in the exhaust, not intake.
But if there's oil in the intake it's normally crankcase venting related.
It can't get there from the exhaust.
It possibly could get there from the Turbo is why I mentioned running N/A
Oil from a leaking compressor would have to travel through the piping to the intake.
Hope this makes sense!!
Your right on those, although I think I should have been clearer as to what I meant on my original post. By intake, I was referring to the intake of the turbo, or the inlet side. when I took off the filter I had a small pool or oil. The shaft has about 1 mm of movement side to side, but nothing in and out, which should be alright, but may be a problem. not entirely sure on that one. I don't have a vacuum source to the valve cover, or the turbo. They are all separate at this point. I read into the problem a bit more, and although I believe I have very good valve cover ventilation, I went ahead and reworked the tubing and drilled a nice hole on the top of my catch can, then paired it with a filter to make things flow better. I will be running it some tomorrow to see if this helps, or fixes anything.
My next suspect may be that the turbo isn't draining properly and is backing up into the turbo. I will have to take a look at my oil return line, although it is run straight down from the turbo, has minimal bends into the oil pan, and is a large diameter tubing. I've never had a turbo apart, so i'm not sure what the seal is like between the oil passage and the exhaust housing, but oil is getting in somewhere after the cylinder.
Thanks again for the information. Ill figure out the problem soon enough with all this insight
Glad you had a safe trip! Unfortunate it's burning oil. If charge piping has oil in it, it's likely that turbo's 4 piece compressor seal.
Unrelated question. Post 14 on page 1... Those cracks around the lifter bores, is that a non-issue?
Unfortunate indeed. From the spark plugs, it looks like its happening after the combustion process which is good, in a way... I've got a few things to check out and try before coming to a confirmed diagnosis.
I had to go back and take a look at that photo. Definitely made me do a double take. From what I can tell you may just be looking at the bits of casting that are around the bottom, or if your referring to the black crack looking things around the rim of the lifter bores, those are just grease "hairs" that are from the assembly lube that I put around the top of the lifters. They definitely do look more and more like cracks the more I look at it. I'm sure that would have been a problem for sure.