Evans adds a bitterant to deter dogs from tasting it. So, don’t drink it, but even a small puddle under your bike can kill your dog if he licks it. Third, Evans Waterless coolant is hygroscopic, which means that it absorbs moisture from the air if not kept in a sealed container. If you leave more than 3 percent of the old antifreeze in the system, you will lose the corrosion-resistant properties of the Evans coolant. Second, to use a waterless glycol-based coolant, you must completely purge your engine of left-over antifreeze. First, if your engine’s water gets up to 375 degrees, there is something wrong with your system, although it is nice to have the failsafe of such a high boiling point. And, as you may remember from school, a pound of steam is made up of a pound of water. Steam also raises the pressure in the cooling system enough to blow open the radiator cap and start spewing the dreaded trail of white mist behind you.

When a pocket of steam forms, the coolant no longer wicks excessive heat away from that area. Steam forms at the hot spots of the engine (i.e., combustion chamber, cylinder liner and exhaust port), and keeping temperatures under control at these hot spots is crucial to engine performance. Steam has zero ability to transfer heat from the engine’s metal components. Once it begins to boil, it turns to steam. Why would you want to raise your cooling system’s boiling point to 375 degrees? Because coolant only works as long as it stays in a liquid state. Still not enough? Evans Waterless Powersports coolant has a boiling point of 375 degrees Fahrenheit. If that is not enough boil-over protection, you can replace the 1.1 kg/cm 2 radiator cap with a 1.8 kg/cm 2 (stock on Husqvarnas and KTMs) and up the ante to 278 degrees. Adding a conventional ethylene glycol and water antifreeze to the system raises the boiling point to 265 degrees. With the typical 1.1 kg/cm 2 radiator cap found on all Japanese-built motocross bikes, the boiling point of water is raised to 227 degrees. In a motorcycle’s radiator, for each pound you raise the system’s blow-off pressure, you raise the boiling point 3 degrees. Evans waterless coolants eliminate corrosion and electrolytic activity significantly increasing the life of the engine.Ĭopyright ? 2013 Evans Cooling Systems, Inc.WHAT STANDS OUT? Here’s a list of things that stand out with Evans Waterless Powersports coolant. Water contains oxygen which causes corrosion and also allows electrolytic activity which further damages engine metals (see chemical limitations of water). The significantly higher boiling point of Evans coolants means significantly less pressure than water resulting in a less stressed cooling system. When water turns to steam it pressurizes the cooling system putting stress in hoses and other components. When the coolant fails in this way the engine becomes even hotter causing more hot spots and more steam.Įvans waterless coolants will not boil around these engine hotspots maintaining efficient cooling performance even when the engine is put under extreme conditions. In these hot spots water is likely to vaporize preventing efficient cooling and causing loss of performance and unnecessary engine damage (see physical limitations of water). Within an engine cooling system the hottest surfaces are those adjacent to the combustion chamber, specifically the cylinder liners and cylinder head.

This article details the benefits of a significantly higher boiling point.

Evans is a superior fluid for transferring heat in engines because it remains in a liquid state until above 190?C. Water is an excellent fluid for cooling as long as it remains in a liquid state, but when water turns to steam it has virtually no capacity for heat transfer.

Evans coolant review