![]() Why have water at all if antifreeze is so great? Ethylene glycol is great, because it's not only water soluble, it's what's called miscible which means it can be mixed in any amount and still mix evenly. Liquid solutes won't hurt your engine when they get pumped through. So, antifreeze should also be a liquid that is water soluble. Salts, even when dissolved in water, can still be hard enough that when they shoot around a closed system like your engine that they could do some damage. It dissolves in water (or on contact with snow/ice), and as it dissolves, it breaks up crystals and makes crystals harder to form. That extra work to crystallize drops the freezing point. When water has something dissolved in it, the molecules have to work more to get near each other to crystallize. When water freezes, it crystallizes and expands. From the radiator it heads back through the pump to start Then it goes to the radiator, where the heat is dissipated to Heater core (the part that heats your car interior when you turn on the Through the engine where it absorbs heat. Antifreeze is also contains some corrosion inhibitors that keep any rust from forming. Antifreeze will raise the boiling point of water. The neat thing about antifreeze, though, is it ALSO addresses the other problems. Antifreeze, as its name implies, drops the freezing point of water (Subaru Super Coolant drops it 66° F, down to -34). It will keep your Subaru secureįrom freezing in all but the most extreme temperatures. With this lastįebruary's average daily temperature of just 6 degrees in Bangor, it's Water expands and freezes, and ice moves terribly through pipes and engine parts. Which not only means damage to the engine, it means that it makes the flow of coolant more turbulent, it could lead to greater engine friction, and once that rust forms, you have rusted steel particles suspended in the coolant flowing throughout your engine dinging things up all over.ģ. Water on steel could rust or form pits in the engine. The water would be in contact with steel, and over time, it could oxidize, which would also damage things. Air is an insulator, and it doesn't flow the same, so the air pockets would mean less heat is absorbed and that the regular flow to cool down the engine would be interrupted.Ģ. If your engine gets too hot the water could boil in the pipes, creating air pockets, which makes the overheating WORSE. ![]() Water itself would work pretty well except for three problems.ġ. And possibly make your vehicle undriveable. If your engine were to get too hot, engine parts could warp or break, and those warped or broken parts could inflict even more damage. This helps keep the engine in good condition by keeping it in an appropriate temperature range. Your engine is cooled by liquids that are pumped through the engine to absorb heat and expel it away safely. Okay, actually, antifreeze is what makes engine coolant more effective.
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