![]() ![]() This has been observed under lab conditions, it rapidly condenses back to fluid form as it has nowhere to expand to other than the secondary fluid layer. If you imagine that the cylinder wall is much hotter than the coolant temp due to thermal gradiant & that every other molecule in contact with the cylinder wall or head passage is water & it wants to turn to steam at any point it's sees heat higher than 120c regardless of the other fluids properties. All the waterless coolants I heard of claim lower operating temperatures at the cylinder wall ! Due to there resistance to boiling. Not promoting anything, but just comparing apples with apples 50/50 is NOT water so should be taken into account. It's not water, it is heavier, it has less heat carrying capacity & is 50% by volume in a 50/50 mix ! Rush, did you check the thermal properties of anti freeze ? NOTE: I checked a little further and the Evans coolant is more dense than water by ~11%, so. Granted, the higher boiling point of the waterless coolant keeps the pressure of the system down, but neither of these things helps the waterless coolant cool the engine better. IIRC, water at 15 psi boils at ~240F (115C) this number is even higher when mixed properly with approved anti-freeze. Our systems are under pressure as they heat up and this increases the boiling point of all liquids. The sales video showing anti-freeze boiling in a pan doesn't reflect what happens in our cooling systems. A more accurate measure of the cooling effectiveness of this product would be your oil temps with conventional coolant mix and comparing after changing to the waterless coolant. but your internal engine temp could actually be higher. Since the specific heat capacity and the thermal conductivity of the waterless coolant is lower than water less heat is transferred to the coolant for the same amount of contact time and differential temperature than is transferred to water because of this, more heat can be retained in the engine metal and oil that should have been transferred to the coolant and your coolant can run at a lower temp. It is important for our engine coolant to absorb heat from the engine and release it at the radiator. The Evans Waterless Coolant originally mentioned in this thread has a specific heat capacity 37% lower (by mass) than water and thermal conductivity 55% lower than water. both issues are addressed by mixing 50:50 distilled water with an approved anti-freeze. As Shinigami pointed out, water has one of the best properties on Earth of a liquid for absorbing and releasing heat (heat capacity or thermal capacity) the problems with using water in our coolant systems is that it boils at a relatively low temperature and it doesn't prevent corrosion. I'm glad this is working well for you and cleaning out the coolant system will help any coolant work better. The other great thing about this product is that it has no ill effects on rubber, silicon, brass, copper, aluminium or cast ion and therefore can be used in any vehicle and once installed does not have to be changed for the life of the vehicle. The webpage for Liquid Intelligence has a number of videos showing antifreeze and waterless coolant being heated on a hot plate where you can visually see the antifreeze boiling away and the liquid coolant sitting on the hot plate as a puddle. As the product does not boil until it reaches 190 degrees centigrade the coolant is continually in contact with all surfaces in the cooling system. On using both products I can state that my cooling system now operates cooler than it did before. Prior to using it I also used their other product for flushing the system which completely removed all scaling and build of crud that had built up over 13 years on all aluminium surfaces of the internals of the cooling system (See link )I could not believe how much crud came out of the bike whilst completing this process. The product I used is made by an Australian company called Liquid Intelligence (see link ). I can not confirm how it would operate in sub zero climates as here in Sydney the temp never drops below 8 degrees centigrade, however it is rated to -54 degrees centigrade. I have had waterless coolant in my 2002 VFR800 for 6 months now and it has been great for the hot climate in Australia.
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