What a thermostat does is that it gets the whole engine warm at about the same rate.It kind of balances the heat,and makes the engine work better,especially a Diesel.You are right about it being hotter and sealing better. Now,what are you having a problem with?Loosing coolant?You dont say why you dont have a thermostat in it.You dont say if you can see where the coolant is leaking out or if it is. You could put a thermostat in and see if that fixes it.You could see if you have any water leaking to the outside,or into the oil,you could pull the exhaust manifold off and see if one of the ports is clean which would mean its getting water from that cylinder. Diesels run better when they are about 190 degrees like somebody else said.Since they dont have spark plugs it takes heat to ignite the fuel,and at 190 degrees is how they are made to operate.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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