Turbo gone?

[jsidik]

I have an 02 wrx with about 190k on it, i'm using a k&n drop in filter, gimmick turbo inlet(the stock one broke), gutted downpipe, and catless up pipe, and until a few days ago I was running stainless wrapped headers. I have a stage II xpt tune, which did not call for the headers or turbo inlet, but I researched the turbo inlet, and people said it didn't NEED a tune. I ran this set up all last fall and through the winter, but decided that I might be better off with a stock exhaust manifold instead of the headers. So I switched back to the manifold, and two days later my turbo started making this horrible sound while building boost. I took it back to my shop right away, and took the turbo out. The compressor turbine is rubbing just the slightest bit against the housing. Anyways, I have another turbo on the way, but I want to make sure I don't just wreck this one. Any input on how and why This happened? Thanks guys.

 

[TheNailman]

possible that it died of old age. however, for the turbine to be contacting the housing, there must have been some bearing damage. perhaps it wasn't getting sufficient oil?

 

[jsidik]

That's what I thought too. When I took the oil lines off there wasn't any oil drip, but when I took the turbo apart it seemed to be oiled well. There was also some oxidization build up, or carbon, on the housing by the turbine.