Antifreeze does raise the boiling point of water, but how many old tractor radiators run above the sea level boiling point of pure water which is 212 degrees F. Actually unless you have one of the new engines which are designed to run hot, distilled water and an added rust inhibitor/water pump lubricant, which you mentioned, will cool the engine better. Plenty of experience to pack up this statement by having participated 30+ years in developing off-road vehicle cooling packages. Several MM operator manuals I own, recommend draining the antifreeze and using water and anti-rust in the summer months for the mentioned better cooling. I don't do it because it would be a big hassle, although I do watch the temperature gage. However, diligent consideration must be given to cylinder liner cavitation erosion/pitting. Would sure use antifreeze in an IH engine which has history of this problem. Don't know about JD's. If they mention it is OK to use water and a rust inhibitor then do it.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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