Hello together, I have run the days a smart (450, petrol, 40 kw, 600 ccm ), which runs only on two cylinders! Now I need advice from a specialist! I have unscrewed the head and found that an exhaust valve has burned through. I guess it was due to the high oil consumption! The turbo looks really good, the wheel can be moved minimally on the shaft, otherwise play-free. The barrel bushings also look great, Honrillen Still completely available! What do you think, why he burned so much oil? Should I change the oil stripping rings or the turbocade? Or both? For a few expert tips I would be grateful, since I have never screwed to a smart! Thank you in advance!