I am buying a 2006 F-350. The guy had it into the dealership due to it smoking (he didn't note black or white). It is tuned and the dealership notes the heads and injectors are fine but that the engine has bulged cylinder walls. This is the first I have heard of a 6.0L having bulged walls. I heard of blown head seals, failed oil coolers, blown turbos, cracked pistons, and even broken rods - but never bulged cylinders. Is this ligament or is the dealer squeezing him for $. Can the 6.0L be bored? I have some telling me no as they are ceramic coated so they can not be while others note that they can. I am picking it up tomorrow so I will know more then, but any information on bulged cylinders and boring would be helpful. Thanks.