Re: Re: Re: Cold weather is coming

Posted by John in SD on September 11, 2003 at 21:03:59 from (209.240.198.61):

In Reply to: Re: Re: Cold weather is coming posted by markct on September 11, 2003 at 20:03:45:

Mark, I agree that anti-freeze doesn't raise the boiling point of water, but when you add anti-freeze TO the water, I think the boiling point of the coolant mixture as a whole is raised.

Something like 265 degrees with a 15 lb cap and a 70/30 max strength mixture sticks in my head. Who wants to run a tractor that hot anyway? If I think to look when I'm out in the shop I will read the back of an antifreeze jug to see the maximum boilover and freeze protection.

Actually I think I have read where a 30% antifreeze/70% water mixture provides adequate rust inhibitor/water pump lubrication and the best cooling, but the freeze point is 0F. A 50/50 mixture freeze point is -34F.

I don't think many older tractors run as much pressure in the cooling system as modern automobiles. I think my Fords and MF have 7 lb rad caps. My Case DC cooling systems are not pressurized at all.

I only use only distilled water in the coolant mixture in my engines and I try to add water pump lube/rust inhibitor at least once a season.

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