Lex_GTX

Here is how the spark plugs look. This is the same plug (cylinder 2) with flash and without flash. You can see the ashy deposits on the plug and all plugs look pretty much the same.

gpr8er

be sure that the AOS and ISV hoses are correctly placed on the intake. If these are wrong you pressurize the crankcase.

Lex_GTX

Triple checked and the AOS goes from the Jboot to top of AOS and the ISV goes from the manifold to the cold pipe (the pipe between the throttle body and intercooler)

cruise98

Go take a drive and get in the boost. cut the throttle, pull over and remove the intake hose at the throttle body. see if oil is pooling there.

Lex_GTX

You mean the cold pipe going from the intercooler to throttle body correct? There is some oil in it, not excessive but some.

There is NO oil in the pipe FROM the turbo to the intercooler (zero oil). Where would the oil be coming from in the cold pipe? The idle valve?

cruise98

Sorry, I got interrupted before I finished my thought.

The compression and leak down are very good, so I do not believe that blowby is an issue. The plugs have some deposits on them which may be from oil that gets in the intake system from the compressor side and then dissipates before it collects anywhere. Any idea how old the plugs are? I thought you could get on the boost until it starts smoking and cut the throttle, shut down the car and pull the hose to see if any oil collects at the throttle plate. If nothing shows up, the oil is probably getting into the hot side which is the more likely scenario.

Oil smoke screen under boost is a classic turbo failure. It is a much less expensive repair than an engine as well.

Lex_GTX

Yes, I don't see much oil if at all on the intake tract and throttle body. They are pretty clean - the compressor is not putting oil in the intake (compressor outlet is dry) and neither is the AOS/crankcase vent - they are all dry in 2000km.

Those plugs are pretty new and have around 2000km on them. If the plugs were completely clean of ash I would totally be on the same page that it's just the turbo.

I could just swap turbos, I have a spare 26/6 I can try. I am just a little worried about the sparkplug deposits and was thinking either valve seals or oil control rings (not compression rings) but it seems you folks don't think this may be the case which in my opinion would be great.

Ronin-951

I once thought I had this problem just after the purchase of a California Car. Looked in the Rearview Mirror while in Third, and I was sure the Engine had exploded. Immediately pulled over to check it out. Two black trails a car width apart pointed to the problem, - warm weather Tires.

Lex_GTX

I wish the answer was that fun. Unfortunately my smoke is coming from the tailpipe. I will get a vide of this once the rain clears up.