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 - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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