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Coolant and antifreeze

Coolant
Undoubtedly a top product

For many of our classics who spend their hibernation in unheated storage rooms, the best thing can be: Is the cooling system protected against frost? If we take on the damage after the horror winter of 2018, it would be a shame if we had to put '1 engine block' there on the damage list.

From water to water with glycol to glycol

And then you dive into the coolants. In the beginning there was water. That freezes when the temperature falls below 0 degrees C. Then came 'antifreeze', then came smarter coolants with all sorts of lubricating, cleaning and oxidation-preventing additives. But all that stuff consisted largely of water. And now we also have the anhydrous coolants. They are quite expensive. So they have to be good. On various sites we found some texts from providers who apparently happily dragged through Google Translate and where some unclear or incorrect information could be read. However, some searching made clear: Waterless refrigerant is based on glycol.

So glycol as a coolant


1,2 ethanediol, commonly referred to as ethylene glycol, ethylene glycol or simply glycol is an alcohol with the chemical formula C2H6O2. The liquid is a colorless and viscous liquid with a sweet taste that can be mixed with water in all proportions. And in the past there was a warning at home and kitchen key work against just running old coolant: Dogs really liked it. But it made them sick. At least. Fortunately there is no more tinkering and the waste oil no longer enters the sewer. This glycol was added to the cooling water as 'antifreeze'. There were pipettes with a bob in it. This determined the specific mass of the mixture and thus the protection against frost.

And then we are back with the waterless stuff

C2H6O2 + H20 = coolant. Without H2O (water) it is therefore anhydrous coolant. And the Evans company is great at that. Or at least has a dominant Internet presence. In addition to all sales and marketing chatter, we found an authentic-looking laboratory test (compared to 'No Rosion' coolant) under https://www.norosion.com/evanstest.htm  There is measured values, advantages and disadvantages. The information is interesting but of course we cannot vouch for the content.

On the plus side

The boiling point of the product mainly consisting of glycol is at around 180 degrees. And we benefit mainly in the summer. Protecting against frost does the stuff up to -40 degrees. It is also anti-corrosive to light metal and is a 'lifetime' filling.

Only the water-free coolant costs around € 85 per five liters. And it only 'works' optimally if a maximum of 3% 'residual water' of the previously used refrigerant has remained in the block. Otherwise it's just a very expensive coolant. And how can you get those last drops of water from a cooling system?

The stuff has a number of very practical benefits.

The Evans Benelux importer Millers is a recognized serious company. Anhydrous coolant seems like great stuff after an engine revision. Then the block is dry and the system can be filled 100% with the stuff. Millers even supplies water-free coolant especially for classics. After the first filling, according to the manufacturers, it never needs to be replaced again.

For normal use with ordinary classics, ordinary coolant, although that of the Action, still seems a great protection against the horrific winter that we may deem.

 

 

 

 

5 Comments

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  1. I have worked for years in the development of antifreeze. There were two basic technologies: silicate and phosphate. OEMs such as Volkswagen Daimler mainly worked with phosphate technology, the so-called Long Life. Both are based on ethylene glycol. Propylene glycol was only used in food industry due to the toxic nature of ethylene glycol. What we have always experienced is that pure glycols have a very poor cooling capacity and are actually not workable in current OEM engine technology

  2. I can't find an image of it anymore, so I think it doesn't exist anymore, but in the 60's and 70's there was a “For Life” under that brand name.
    Was indeed better than water with antifreeze then, especially with the Peugeot 504 engines there were fewer problems with head-hunters (aluminum that was lost between gasket and cylinder head). But even then it was already at the price and there were few who had it filled when the new car was delivered. It was also not entirely for life, thought it could stay for a maximum of 8 years.

  3. Hi people.
    I read with great interest about the waterless coolant.
    If it is stated that at least 3% of water must be left in the block for the golden substance to work, this certainly points in the direction of some glycol.
    From a physical point of view, water is by far the best when it comes to cooling effect due to the high specific heat. It would interest me how that will be with the waterless agent.
    Also know that any addition of glycol to cooling water reduces the heat transfer compared to operation with water only and that the glycol / water mixture has a mixing ratio with a lowest freezing temperature. Any other mixing ratio will cause the substance to solidify earlier. I was just happy with my float to get the coolant mixed correctly 🙂

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