Hello-

I've got an 83' 240 that has an aweful engine knock. I checked to see if it was the injectors by cracking the lines and it still knocks like crazy. It continues to knock the more you rev it up to the point where it sounds like it may just let something loose. I'm assuming the worst-bad rod/bearings or damaged piston. What am i looking at here as far as repair or replacement of the engine, assuming I do the work myself? Where and for how much can I find a used but good 240D motor? Thanks!