Turbo on its way out?

[Guest]

Today I was bored so I decided to install my Greddy RS bov using the kit on my stock intercooler pipes instead of waiting until I get a blow-through setup this summer, and yes I am recirculating. When i removed the stock bov i noticed what seemed to be an abnormal amount of oil in the intercooler pipe. It looked like there was a little stream of oil resting in the bottom of the pipe. I decided while i was doing this I would check for turbo shaft play, there was none from what i could tell. But when i went to spin the shaft it would spin and then stop every rotation, but not in the same spot all of the times, and it was hard to get it moving again. I am not exactly sure if both of these things are fine or what, so any help would be greatly appreciated.

 

[fatherbubble]

I think the thrust bearing is locking up. I could be wrong I'm not too good with turbos. I do know that oil in the intake pipes means oil is getting by your turbo seals. Either they're worn out, or you got restriction in the oil flow from a bent line or clogged line.

 

[topchoice]

Right,check your oil feed line to the turbo, I doubt it's bent up but if it's stopping every once in awhile it might be the turbine shaft. Which is the thing that connects the compressor wheel and the turbine wheel.

Do you hear any scraping of the wheels by the way?

 

[DSM_PWR]

Dont forget oil in intercooler pipes also comes from your valve cover which is why people usually get catch cans.

 

[JusMX141]

Sounds like any other DSM I've ever worked on that had all of the stock emission control equipment in place.

With the PCV and crankcase vents routed to the air intake, the turbo is literally drawing oil vapor out of the engine under full boost. You want to remove the PCV valve and replace it with a standard 1/8" NPT hose nipple, then vent the PCV and crankcase vent lines to a catch can of some sort to control this problem.

 

[topchoice]

Ok, well we get why there is oil in the ic pipes. Catchcan and possibly case closed on that. But the turbo's wheels rotating then not is diff.

 

[JusMX141]

It could be something as simple as a piece of carbon in the turbine shaft seal groove that is holding everything up.

If there is no shaft play and you can later verify that the turbo isn't using oil, there's no reason to think the turbo is faulty.