you dont have to take the nut all the way off, once you have it loose, real loose, just take a screwdriver and pry under the lip of the clamp and it wil pop loose. then you can squeeze the clamp together and take the backside of the clamp screw out of the keeper allowing the clamp to spread apart even farther. then you will ba able to rotate the D/P and make it come loose from the turbo. i hope this helps, if not PM me and ill take a picture for you showing you where to pry and where to take the clamp loose.