Thanks Tom. I thought maybe the blades would just seize up and the turbo would effectively just shut down. I guess I'll have to pull the whole turbo off this weekend. The car is a 300SD that was repowered with an engine from a 300D. Somehow or other, the turbo was misplaced and never re-installed up until about a year ago. I drove the car turbo-less for about 6 months or so.