good, cheap, efficient and available almost anywhere
Water alone is not used as coolant for automobiles.
it is used as a coolant
Water is not used in most modern cars, or at least is not recommended. If it is used, it is because it is cheap and easy to find and will do the job .
When discussing the use of freon (or chlorofluorocarbon as it is known) it usually refers to refrigeration and air conditioning. When talking about cars, freon gas is used in the Air conditioning unit. It it sometimes used by racing cars in the radiator in leu of regular coolant (or anti-freeze) but this is not a common practice. On regular cars, coolant is an oil based product placed in the cars radiator and reservoir diluted with water. It's function is to allow the radiator fluid (coolant and water), to be heated and cooled beyond the natural point of water to aid in the cooling of the cars engine.
Engine coolant contains certain chemical properties that water does not. Coolant is used in cars, busses, trucks, and other vehicles, and it is never recommended to use water unless it is only a short-term fix until you can get more coolant. The main difference is freezing point. If you use water as coolant in the winter, it will likely freeze and crack your engine block. In the heat, water boils much faster and produces more heat.
The use in modern engines is not recommended because of the high temperatures encountered by the coolant. Etylene glycol or other antifreeze products also raise the boiling point of the water, to better avoid overheating.
A 50/50 mixture of anti-freeze and distilled water.
50% Anti-freeze and 50% clean water is generally used for engine coolant. This mix protects the cooling system from freezing down to -34 degrees F.
This is used to keep the motor from overheating and from freezing. Thus the name "antifreeze" and "coolant".
NO
No, cars use internal combustion engines which require a flammable fuel. There is a 50/50 mixture of water and antifreeze use as a coolant in the engine.
This question refers to the pump used to circulate coolant in water cooled engines. In passenger cars and trucks water pumps are typically mechanical (engine driven), but some have electric motors. The water pump is characteristic by having two coolant lines and a pulley that drives its impeller.