Join Date: Dec 2006
Location: Oak Park, Ventura county (Los Angeles), CA, USA
Re: Waterless coolant
I learned something here. Of course that leads to more questions....
Evan's coolant. Reading comments online about it some note that it has a thicker viscosity than "standard" coolant. Evan's sells at least 3 different types, but I can't find mention of the viscosity of each... or what is most like 50/50 distilled water and Prestone.
Water boils at 212 degrees. A 50/50 mix of Distilled water and Prestone "any car" boils at approx. 228 degrees, adding a pressure cap raises the boiling point approx 2-3 degrees for every psi of rated cap pressure, or for a .9 bar cap 13 degrees, for a new pressurized boiling point of approx 240 degrees, still shy of head warping temps.. which on an air cooled airplane engine are set at 420 degrees.
So Evan's type non water coolant can operate without "pressure" because it is not boiling. I like the concept of 375 degree "boiling" point, takes the issue of a bad cap out of the equation... The cap is there to raise the boiling point, a non issue with the Evan's.
No "boiling" means no pressure, I like the concept! ... but which product?
Bruce - pilot, Belynda - pillion
Oak Park, CA.
'99 K1200LT Champagne, 28,500mi
'04 R1150R Silver, 18,900 mi
'12 R1200RT Beige, 28,400 mi (sold 4/19)