The thread is a perfect example of the BBS diagnostic process. The poster describes the problem in detail, outlines what has already been tried, and then asks the community for help. Within hours, users chimed in with suggestions, from checking the valve guides to inspecting the turbo seals. One user, pointing to the pattern of smoke on deceleration and after idling, correctly suspected that oil was pooling in the turbo and being blown out the hot side, creating a smoke screen out the muffler. The solution was confirmed shortly after when the owner swapped the suspect turbo and reported, "No smoke on the K26". The problem was a faulty K27 turbo that was leaking oil when the engine was idling.

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