There’s oil in the pre-turbo inlet, and in the third picture of the turbo outlet some oil is present. Probably just blow-by/pcv oil that’s made its way into the intake and further downstream. May warrant pulling the intercooler and having a look, too. Could be turbo seals, but less likely in my opinion. Mostly nothing to worry about but make sure the pcv is working well and replace the lines/keep an eye on things. If it’s purely pcv oil, a catch can would help keep it out of your intake tract.

 

Hi KrisOK,

When I changed the spark plugs today I noticed the rear bypass hose has been replaced with a straight hose which has been forced into a "Z" shaped. The hose almost completely kinked around the bends.

Would this be one of the factors that caused with the oil in pipes ?

 

My suggestion... if you want know for sure

Install catch can (between oem exhaust cam cover breather-intake). Just to make sure that oem breather system work as it should, check (with air comperssor etc) that one-way valve in intake side (intake cam cover - intake manifold) is working as it should.

IF (after some time...) there is less oil residue than previously in intake stream after catch can install, oil is from breather system... I would then keep the catch can and continue just enjoying the car

IF (after some time...) there is still same amount of oil in intake stream, that is from turbo1, turbo2 or both. Only way to get it repaired is to change/repair oem twins or go to single. I would not mind it too much, UNLESS there a lot of it.


Dont know what your car mileage is but
if i had to bet.... turbos. 1 or 2. Had this exact same broblem for 10 years and finally 2nd gave up this spring (massive oil and coolant (!!!) leak to exhaust, hairline crack in cartridge).

Now fine with "new" oem turbos.

 

Probably not helping lol. Get the right ones for sure.

 

That's not hurting much, it's just equalizing the crank case pressure between the two valve covers. I highly doubt that has anything to do with your problem.

Oil in your intake is going to be from your engine having blow by and not a "nice" way of extracting the pressure in the crank case.

The suggestion to get (and monitor regularly) a catch can is the best bet. Oil in the intake charge causes knock and does not burn like air fuel mix does. This 100% robs you of power when your motor ingests oil through the intake tract.

With that said, some of the fastest cars I've seen at the drag strip had motors that were on their last leg with massive blow by and giant nitrous shots..... still ran fast, but just blew smoke the whole way. If your car is a DD and not a race car, I would suggest addressing the blow by problem because a catch can is technically a band aid for the symptom and not a fix for the problem.

 

Just an update to this problem it turned out that one of my turbos were blown.
I got a good second hand set and no more oil leaks on the intake and boosting fine

 

Go Kiwi!!!