Hi there! Need a b4 tdi expert tip. My tdi (220.000km) is now rusting while giving gas. Not much, but still worrying. Small history: Had a few weeks ago the following phenomenon: – Drive every day about 160 km highway at speed 150. Suddenly a sudden power break occurred, then a short-lasting blue cloud out of the exhaust (seen in the rear mirror). After 2 seconds everything was ok again. Still drove to the next parking lot to look at the right. EVERYTHING OK!!! So I went on. After that I had about 3000km quiet and everything was quite normal, until I had to realize yesterday that the engine out of the exhaust black rusts when speeding up. Although not threatening, but already worrying. In the idle run everything is okay: No soot, no rattle, everything was fine. Because of the first incident, I thought that the turbo was broken or something. Have taken off today but the turbo hose. Result: I didn’t see anything normal yet?