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 - A Lifetime of David Brown Tractors - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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