So after replacing the zfr6758 turbo (turned out to be bad) and driving about 3k miles, I went to replace an oil, and just to be sure everything is good also removed air intake pipe.




this is what I found. Air intake tube was covered in oil .Even got some on a maf sensor (the one after air filter) Oil in turbo outlet. Checked for a shaft play. Zero play. The only area I see the oil can get there is the line that goes from valve cover to turbo (right in front of turbo propeller). Unless I am missing something. The car drives fine. Little louder, probably due to me reusing old downpipe gasket (forgot to order new one).Realy hoping for some knowledgeable help here For right know I am driving it like a realy old grandpa, trying to stay away from the boost

 

The only reason I can think of for that much oil in the PCV system, is worn rings/cylinder walls/piston. This causes more blow-by, and excessive crankcase pressure.

Wait, it just occurred to me that a blocked PCV valve could also cause excessive crankcase pressure.

Have you had a compression or leak down test performed

 

I did compression test. 1st cylinder is 130, other 3 are 125. I have ttr intake manifold which has a line with PVC valve cartridge. Also I installed catch can in that line after pcv valve. If piston rings were worn, it would be smoking. It does not.

 

this is the setup

 

Are you sure you have the one-way valve installed correctly?

 

 

it is drilled out at ttr so you can't install it other way.

 

I keep draining that catch can. So I am assuming it is working properly. But will check pcv valve. And try to run it without catch can. Maybe it is not 100%operational.

 

"compression test. 1st cylinder is 130, other 3 are 125" - are they not way low?

 

idk. But all four have pretty much the same readings.