Evans Waterless Coolant | Scotts Owners Club

This topic has 2 replies, 2 voices, and was last updated 8 years, 2 months ago by gammakeith.

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19th July 2015 at 6:08 pm #4101

Graham Parker
Participant

Hi

Has anyone used Evans Waterless Coolant? Claims to be good for Iron, Aluminium & Copper.

Also claims boiling point of 180 degrees and freezing point of -40 degrees (Celsius in both cases).

The car boys seem to rate it. It is expensive, but seems a good option given that it stops any corrosion and I guess 180 boiling point can only be a bonus in a non-pressurised system.

Would be interested in thoughts or experiences?

Thanks

Graham

20th July 2015 at 2:54 pm #13726

Graham Parker
Participant

In case anyone was considering this, I contacted the makers today and they were clear that it is ok for general vintage use, BUT NOT OK for thermo / syphon systems, and thus not compatible for use in a SCOTT – apparently its to do with the thermo-fluid dynamics of the coolant, which would cause overheating around the barrel before the syphoning action would commence.

Given that I’m going to use Morris Lubricant’s “universal anti-freeze” which they recommend as being ok.

21st July 2015 at 6:23 am #13727

gammakeith
Participant

I looked into this whole issue as my Scott is boiling over with the smaller radiator I have had fitted and independently came to the same conclusion. The main problem with the waterless coolants is that the engine will overall run hotter. I don’t know much about Scotts but in my experience of 2 strokes this is a bad thing 😛 The actual heat capacity of these coolants is less than water so for the same amount of heat given out by the engine the temperature of the waterless coolant will go up more than water. With an efficient water pump and a good radiator this is not a problem and in fact the waterless coolants improve heat flow by preventing localised boiling.

I have filled my Scott system with distilled water plus a bottle of water wetter (which does have some anti-corrosion additives) and when I can get chance to test it (ha ha) I will report back. My hope is that the better heat capacity of pure water (compared to anti-freeze solutions) plus the improved heat transfer of the water wetter may just allow my radiator to keep its cool. The other advantage is that my radiator no longer leaks! Mind you I had better remember to drain down in the autumn……

Keith
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