I recently purchased a 1988 S1800 with a DT360. It started right up and seemed to drive fine at the seller's house. Set out to drive it home and after about twenty minutes on the interstate, it began to lose acceleration. A headache and whole lot of knowledge & cash later, I changed and cleaned the fuel filters. It drove great for about an hour, but with very limited speed. (I know very little about automotive engines, let alone diesel. Learning!) Then I began to notice a distinct smell and white steam rolling out from the hood and into the cab. Popped the hood and steam is blowing out like a tea kettle from top and a pipe pointed at the ground. Does this sound like simply overheating? What should I do? I've heard flush the radiator and need to get the oil and filters changed. Maxed out thermostat after 20 min drivetime, limited speeds & rpm not exceeding 25k. There is also a black liquid that has been spattered all on the underside of the body. Black slick blow back even got on the (my) car following me home.
Please point me in the right direction, I want to learn about this beast's heart and fix/learn as much as I can myself.