Everyone says RP Turbos are junk and they are. I hadn't heard of turbos failing like this though. I've been having a boost issue since last summer when the clip came off the adjustment nuts on the wastegate and the rod was loose. I got it back in place and the car still built boost slowly and would only peak at about 18 pounds. After much adjustment to the wastegate, nothing changed except a nut seized. Today while swapping the wastegate, I realized the wastegate arm on the outside of the turbo was much further forward than on a K03. Using a boroscope, I looked at the turbo from the exhaust side and found this:




There is a disc that should be there to seal the turbo and allow it to make boost. This is what a good turbo looks like:



The turbo is useless after 7-8k miles from an obvious defect. Maybe it's time for 605s.