turbo gone maybe

[timsturbotalon]

when i let off the gas for a bit then get back on the gas it smokes blue really bad. turbo has a little shaft play not alot.

 

[LiquidX]

Do a compression test to check the rings and a leakdown test to check the valve seals.

 

[DeadsEvolution1]

Even if you didn't have shaft play, that doesn't mean the oil seals are not failing. It's hard to say though. If it smoked under load alot that would be different

 

[emerica12124]

A compression test will tell you a lot. Do a dry test and a wet test with a tiny bit of oil. Good luck

 

[JusMX141]

Shaft play and oil burning don't necessary complement each other. I've seen turbos with insane shaft play that never smoked, and I've seen turbos with no shaft play at all that smoked horribly.

Where are you feeding the oil supply from? For a 16G under 25psi of boost, you should be using the factory 1G feed line from the head.

 

[timsturbotalon]

well just rebuilt motor about 1000 miles on it now. been driving it easy for break in just started smoking but i will check it out. i have a stainless feed line.

 

[georgiaboy]

Do a compression and leak-down test, definately. It could be that when you let off the accelerator, the engine pulls a lot of vacuum. This vacuum can pull oil from the top of the head, past the valve seals, and down the guides along the valve stems. This puts oil into the chamber. Then, when you put your foot back in it, the oil is burned and you see blue smoke momentarily.
Check and make sure that you didn't get anything into your turbo drainback hose during reassembly. It has been my experience, though, that when this happens (the drain for the turbo is obstructed), that the smoke is present all the time after warm-up, but at varying levels of smoke. More revs, more oil volume, more smoke.
Yes, the turbo could be shot. The turbo seals could not be able to seal fully if a little piece of trash or debris is keeping them from fully sealing. This could be your problem, too, but don't automatically assume it is your turbo that is the problem. Look for the root cause of the problem and not just a symptom of the problem.
Do ALL the tests; don't assume anything! Proceed with the tests systematically and I am sure you will find your problem. Good luck, man!

-Les