The dealership my wife works at does a similar service and recommends the procedure.
I agree with Z and would add that, if it's being done at the dealership and you are under warranty, you don't have much to loose. In the event that it does cause turbo damage (which I believe is the main concern), you still have a warranty in place.
If you do it outside of the dealership and it leads to failure, they could then refuse repair based on the procedure causing the failure. That is of course, if they figure out you had it done.