i have a 2006 dodge 2500 cummins. just recently it started blowing alot of blue smoke. te first thing that came to mind was a fried turbo. when i started pulling it apart there was oil in the intake. the turbo shaft had aot of play so i replaced the turbo. there is still alot of blue smoke and a knocking noise. cant exacty tell where the knock is coming from. des anyone have any suggestions.