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johnnyrod · 24-03-22, 08:22 PM

One advantage of propylene glycol is it's non-toxic, so quite unlike ethylene glycol, but it's more expensive and you need more of it to achieve the same freezing point depression - that said, 50/50 as is the norm these days with ethylene glycol has a freezing point of -37C so it's massively overkill in that respect. Embee am I right in saying that one advantage of water is you can get boiling at very hot spots which relieves the heat, even though it does temporarily take up more room in the cooling system?

24-03-22, 08:22 PM	#15
johnnyrod Member Mega Poster Join Date: Jul 2003 Location: Doncaster, oop norf Posts: 2,122	Re: Waterless coolant. One advantage of propylene glycol is it's non-toxic, so quite unlike ethylene glycol, but it's more expensive and you need more of it to achieve the same freezing point depression - that said, 50/50 as is the norm these days with ethylene glycol has a freezing point of -37C so it's massively overkill in that respect. Embee am I right in saying that one advantage of water is you can get boiling at very hot spots which relieves the heat, even though it does temporarily take up more room in the cooling system?