Letter from a Reader

August 7, 2014 Comments (0)
I have started using Evans' waterless Coolant and I am a total believer. I put it in my Mini after a hose and radiator change, took it out on the highway, let it sit and idle till the auxiliary electric fan cycled and then shut it off.

I then did something NO sane person would do... I loosened the pressure cap and, contrary to what one expects, there was no rapid escape of pressure followed by "massive coolant vomiting". In fact I don't recall even a "piff" of pressure relief.

The point is that the boiling point of Evans waterless coolant is so much higher than that of water-based coolant that it doesn't build up pressure which contributes to seal leaks, weakens hoses, etc.

Because there is no water in the coolant, there is no free oxygen and hydrogen (the components of water) plus minerals, to promote electrolysis and corrosion of the dissimilar metals in the block, heads and pump and to attack the hoses.

Think back to the last time you opened a cooling system or let older air out of a tire... Remember the "rotten rubber" smell? That is the smell of oxidized rubber having been attacked by heat and the free oxygen in either water or the moisture in the air inside the tire.

Not only does the heat and oxygen attack the hoses from within, but the expansion pressure weakens hoses AND radiator seams too.

Evans coolant removes all those problems except heat... BUT, it also REDUCES heat because Evans is about 30-50% MORE efficient in transferring heat which turns a vintage British car cooling system into one that acts like it was engineered properly in the first place AND allows one to install a higher temperature thermostat which actually enhances the performance and fuel mileage of an internal combustion liquid cooled engine, which just isn't possible with coolant that has a 212 F boiling point that must be compensated for by allowing pressure to build to up to 18psi. to prevent coolant boiling.

The "kicker" is that Evans coolant is truly "permanent". In fact, over the road truck fleets rotationally transfer coolant from retired trucks into new ones with no ill effects. Truly an unheard of economy of "investment".

I liken Evans waterless coolant to using silicone brake fluid for cars that do a lot of "sitting". All National Guard military vehicles specify silicone brake fluids for this very reason. I converted my DB5 to DOT 5 silicone brake fluid almost 40 years ago and still ZERO hydraulics failure or wear or typical corrosion around metal reservoir caps, fittings etc.

Chemistry marches on and it's NOT wrong to abandon the old and take advantage of those advances to improve and preserve our vehicles.

~John Gallagher


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