Well my 2000 F550 over heated and I think its done. Its a pulling truck that I pull a 53' wedge trailer and haul other trailers. Been doing it for many years and never had this particular issue.
I was chugging up a fairly large hill when it started to overheat and I started to slightly smell coolant. Figured it wasnt that big of a deal because I have had many water pumps go on these trucks and its pretty much slow down and get her to the exit where you can get it changed out. So I got it to the next truck stop with out hitting the red and popped the hood. I looked around the water pump and nothing was leaking. It was cooking out of the top of the reservoir. I slowly took off the cap and released the pressure and coolant came bubbling back into the tank. I filled it back up with water and down the road I went since there was nothing leaking out of the pump.
I made it about 50 miles and it started getting hot again. I put more water in and all seemed to be ok again. I got onto a back road close to my destination and it kept getting hot going up hills. I would pop it into neutral and idle down the hills to keep it cool. At this point I was just trying to get to the dealer where they had a garage. Well after a couple of hills it started to make a lot of black smoke. Way more than normal. I also noticed that when idling, the oil pressure would flicker. I knew at that point I was pretty much doomed so I found the nearest parking lot. I would have to keep the RPM's up to keep the oil pressure up and when I stopped before I was able to put it in park, it just died.
I thought for sure it was blown because it turned over really slow and a little funny sounding when I cranked it. I almost seemed like one piston was sticking but I could be wrong. I pulled the dipstick and expected to see fuel or water but found NONE! Then I pulled the fuel filter thinking maybe an injector o ring went but there was no oil in the fuel either. .
I couldnt get it to start until it was almost all the way cooled down. And now a few days later it starts and runs with no problem. I havnt taken it on the road just idled it and let it get warm but it seems perfect.
So im thinking maybe the thermostat went bad? But how would that explain the flickering oil pressure? The oil was really thin because it was so hot so that may be the oil pressure thing, but why did it over heat in the first place? It never leaked water out of the water pump. And the oil is burnt for sure.
So my question is now what? Change the oil and thermostat and run it? Rebuild it? Sell it? Junk it?
Sorry for the long run on sentences but its all I could come up with!