![]() ![]() If I turn on the fan in stop/go traffic when the temperature reaches 180 deg, it will pretty much hold there. Worth going to and find it under the "modifications" section where you can find a description of the issue. Desmotimes sells a fan switch kit or you can search the ST section for other ways to do it. What you (the OP) are describing is pretty normal for ST's, including mine. What it specifically will *not* do is run cooler than the usual antifreeze/water mix. Also, Evans allow you to run without any pressure (radiator cap) in a cooling system since it doesn't need to be pressurized to prevent boiling. When it's been used somewhat successfully, it's to address an issue of steam bubbles forming around very hot spots in 13b and 20b rotary engines. While I have no direct experience, it's been tried and discussed at length on the rx8club forums for years. If these parts are plastic on your machine and you ride in extreme conditions for long periods of time, replace the plastic parts with metal ones.Correct. With waterless coolant, the engine will continue to run fine with restricted airflow, although it is possible that the plastic parts in the cooling system, such as the pump impeller or fittings holding the radiator hoses together, can melt. If you don’t let the engine cool down or refill it, you will damage the engine. In long, hard races where the terrain is muddy, it is possible that mud can get packed into the radiators and restrict airflow and engine cooling. It can’t, however, retain its lifetime use with water added and will go bad within a few years. Evans Coolant will still protect with up to 60 percent water. A waterless coolant that meets the ASTM standards can have up to 10-percent water and still retain its anti-corrosion properties. Many waterless coolants, including Evans’ old formula, would corrode with an addition of only 3-percent water. ![]() So before making a purchase of waterless coolant, make sure it meets the ASTM standards to ensure you are investing in a high-performance product. The ASTM, the organization that sets the bar in over 12,000 technical standards worldwide, has a waterless-coolant standard. With water added, it will behave just like regular coolant and lose the waterless-coolant benefits. You can add water or regular coolant to the system with no issues. If you have waterless coolant in your system and it is low and you didn’t bring extra waterless coolant to the track, don’t worry. It must be said that if there is residual water still in the system (over 3 to 5 percent), vapor pressure will build. There is moderate pressure build-up from a 7-percent fluid expansion, so if you open the radiator cap when the coolant is hot, it may spill out a few tablespoons, but it doesn’t have the vapor pressure that can blow up in your face like regular coolant. Waterless coolant doesn’t build vapor pressure in the system. Stable additives are added to the waterless coolant so the coolant never goes bad, whether it is used or still sitting in the container, so it never has to be replaced. Waterless coolant additives do not fall out of solution as with regular coolant. Instead of expanding when frozen, like water does, without the water, the coolant actually decreases in volume. The boiling point of waterless coolant is 375 degrees Fahrenheit and it freezes at -40 degrees Fahrenheit. They let us in on some secrets, good and bad, on the effects of waterless coolant. There are a few waterless coolant companies on the market, but only one markets worldwide and is highly involved in the motocross industry. Waterless coolant is made up of the same basic glycols as regular coolant but operates much differently without the water. Let’s state the obvious: waterless coolant is different from regular coolant because there is no water in it. ![]()
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