since no one answered this: The coolant temp depends on usage at the time and the opening temp of the stat which is usually stamped on the pellet. Coolant will run up to 20 degrees over this number under varying loads up to that max at max load. The engine will tolerate much higher, but the coolant can boil out and the radiator cap needs to be a pressure type; 6 psig as I recall.
Stats usually are stamped from 160 to 180F. I have a 2000D and I never investigated why, but it likes the 160 over the 180 stat. Normal thinking is that the diesel would prefer the higher temp for better combustion and fuel atomization.
Coolant level in the radiator should be roughly 1" above the core. The space at the top of the tank is for expansion and if you fill it with fluid (which is the normal inclination) it will just boil out (be forced out the vent tube) as the fluid gets hot and expands. The tank doesn't do the cooling, air over the core does.
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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