Baaa ha ha ha ha ha welcome to HELL! I had the same problem and well it was a F'n nightmare! My suggestions unplug and remove the map and cam position sensors; you may need to crawl on top of the motor bump them wrong they will break. Also unplug the sensor that goes to the AC lines.
So Mine had litterally 1 thread holding the turbo to the Dp, the bolt would turn but wouldnt go in or out. It, of course, was the bolt that is closest to the head. You couldnt get leverage to pry it out or anything in to cut it off. I ended up using an air hammer to break the head off. I used an Awl and a hammer once it was out and a very light wack to pop the remainder of the bolt out of the turbine housing. I couldnt believe how little it was stick and how big of a bastard it was being.
My fix was using a through bolt and nut. I could have tapped and fixed the threads but id rather not deal with that again
So Mine had litterally 1 thread holding the turbo to the Dp, the bolt would turn but wouldnt go in or out. It, of course, was the bolt that is closest to the head. You couldnt get leverage to pry it out or anything in to cut it off. I ended up using an air hammer to break the head off. I used an Awl and a hammer once it was out and a very light wack to pop the remainder of the bolt out of the turbine housing. I couldnt believe how little it was stick and how big of a bastard it was being.
My fix was using a through bolt and nut. I could have tapped and fixed the threads but id rather not deal with that again