![]() Stability additives are part of the coolant itself, meaning it will not ‘go bad’ as with typical coolant, and as such, it never has to be replaced. Of course, proper draining of the water and antifreeze that was in the system from the get-go is paramount, because any excess water (more than 3 percent) that remains is going to convert to a gas at 212 degrees and create vapor and thus, increase pressure in the system. For instance, the boiling point of the coolant means there is less overall pressure in the system Evans says there is a minute pressure increase due to coolant expansion, but nowhere near that of water alone, and so if you ever have to remove the radiator cap while the fluid is hot, it will merely spill a small amount, rather than release with force in your face. ![]() This is where waterless coolant comes in, and the leading manufacturer of such a product is Connecticut-based Evans Cooling Systems, which markets their high-performance waterless engine coolant at retailers and distributors across the country.ĭesigned for gasoline - modern and classic cars and muscle cars - and light- to medium-duty diesel engines, Evans Waterless Coolant is a unique blend of fluid that boils not at 212 degrees, but at 375, thus eliminating many of the common headaches that can occur with conventional water-based cooling methods. This process keeps the water from maintaining continual contact with the metal in your engine block and cylinder heads, allowing it to quickly heat up and could lead to overheating of the engine, cracked or warped cylinder heads, and other potentially terminal problems that nobody wants to have on their hands.īut what if your coolant didn’t boil at 212 degrees? But any loss of pressure will allow the water to heat up, boil, and create vapor - essentially air pockets - in the system. The constant pressure in your cooling system, when operating correctly, will prevent the water (or water and antifreeze mixture) from boiling. In the context of an automobile engine and its cooling system, this fact can present a real problem, given the right circumstances. If you were paying attention in your high school chemistry class (admittedly, this journalist was usually entrenched in car magazines hidden in his textbooks, but that’s a story for another day) then you know that water boils at 212 degrees Fahrenheit, or 100 degrees Celsius. ![]()
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