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Some good info on Glycol Coolant
britishtrident - 2/1/11 at 02:41 PM

Some good hard info why it isn't a good idea to fill your rad with high concentrations of glycol coolant, it applies equally well to Ethylene Glycol and propylene glycol.



From Rolls-Royce Merlin entry on Wikipedia http://en.wikipedia.org/wiki/Rolls-Royce_Merlin

Another improvement, allowing the XX and future Merlin variants to run some 70 degrees C cooler, was the use of a 70/30% water/glycol coolant mix rather than the 100% glycol of the earlier versions. This substantially improved engine life and reliability, removed the fire hazard of the flammable ethylene glycol.

MakeEverything - 2/1/11 at 04:01 PM

quote:
Originally posted by britishtrident
Some good hard info why it isn't a good idea to fill your rad with high concentrations of glycol coolant, it applies equally well to Ethylene Glycol and propylene glycol.



From Rolls-Royce Merlin entry on Wikipedia http://en.wikipedia.org/wiki/Rolls-Royce_Merlin

Another improvement, allowing the XX and future Merlin variants to run some 70 degrees C cooler, was the use of a 70/30% water/glycol coolant mix rather than the 100% glycol of the earlier versions. This substantially improved engine life and reliability, removed the fire hazard of the flammable ethylene glycol.


I thought that was common knowledge though, and manufacturers recommendations on Glycol that ive purchased for closed water systems has always specified the dosage.

Bluemoon - 2/1/11 at 04:32 PM

I have heard of people running at 100%.. Not on this forum though..

Dan

britishtrident - 2/1/11 at 05:06 PM

Evans coolant from the published info on the net working from the boil and freezing points is near 100% Proplylene Glylcol ---- snake oil.

prawnabie - 2/1/11 at 05:56 PM

I wouldnt take anything of wikipedia as hard info!

Ninehigh - 2/1/11 at 11:58 PM

quote:
Originally posted by prawnabie
I wouldnt take anything of wikipedia as hard info!


Wikipedia, the internet version of the "bloke down the pub"!

bimbleuk - 3/1/11 at 08:15 AM

quote:
Originally posted by MakeEverything
I thought that was common knowledge though, and manufacturers recommendations on Glycol that ive purchased for closed water systems has always specified the dosage.


Maybe now but the engine was designed in the 1930s!

britishtrident - 3/1/11 at 09:35 AM

quote:
Originally posted by prawnabie
I wouldnt take anything of wikipedia as hard info!


readd the article before making comment the article references an authoritative source for that particular piece of information.

bigpig - 3/1/11 at 10:37 AM

The link to the actual Ethylene Glycol reference is quite good. Discusses why a 50/50 mix is good for car use due to increased specific heat capacity.