Posted by LenNH on December 23, 2009 at 12:39:53 from (71.192.137.159):
In Reply to: 1930 Farmall Regular posted by Roy Ward on December 15, 2009 at 06:26:41:
Alcohol WAS the way it was done when I was a little kid, in the 30s. It worked just fine, but it evaporated before water did, so you had to check the mix to make sure there was enough to keep from freezing. The modern stuff ("Prestone" is the famous name; ethylene-glycol is the generic name) must have come out in the 30s. My father used it at some point in all his tractors and car and truck, but I don't remember exactly when. Incidentally, ethylene-glycol became the coolant-of-choice in "liquid-cooled" airplane engines, like the Rolls-Royce Merlin and Allison V-12s of World War II. I don't know whether it was used straight or as a mixture. One great advantage of the glycol antifreeze is that it is not prone to evaporation. I can't see any reason not to use it in an old engine. It does tend to find ways to seep out, so the hoses have to have good sealing. About the only problem I can think of with the old IHC thermosiphon cooling systems is that the big cap on top of the radiator was not absolutely water-tight. There was always a little slop-out around the wing bolt, and the gasket could leak too if it was in poor shape or the wing bolt wasn't tight. Just meant you should look once in a while, especially IF YOU DON'T see any water slopping out!
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