I just got my truck back together after putting a set of used BD compounds on, I went to take the car for a drive and heard a screeching sound like the compressor wheel is hitting the housing, but everything sounds satisfactory at idle.

I pulled the piping off and looked at the compressor wheels from the front; they do not appear to be contacting anything.

I should also add I had the head off for a broken manifold bolt before putting the turbos on.

New head gasket, assembled and set valve lash. Any ideas? I would post a video, but the site will not let me.