Follow Rons advise, buy three or four cheap oil filters and keep changing them between the diesel flush. The water and cleaners that may be in the pan will burn out in no time, the filter will catch the crude. If the rockers were that dirty, so is the pan, maybe worse. I've pulled dirty engines and cleaned them with a power washer with no ill effects. Pull the sheet metal, soak it down with degreaser, and wash the heck out of it. Leaf blower dry, and soak down with WD40.
