You can buy coolant at any auto parts store or Walmart in America. It is prediluted with the correct amount of water. You can also buy radiator fluid that is concentrated (without water being added) but you will have to mix in the correct amount of water. The concentrated fluid is more economical because you are not buying water. Remember that coolant is not only antifreeze;it is anti-boil. So you need it year round.
If by water you mean engine coolant, yes. Loss of coolant, antifreeze, is a major cause of overheating.
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In a car the water pump circulates coolant through the engine and to the radiator.
It depends on the car! Look in the manufacturer's handbook or service manual for the specific make and model.
Clean water should be used and mixed with the proper coolant for your car.
Water is used as coolant in car radiators because it has high specific heat capacity of 4200 Joules. It has the highest specific heat capacity than any other substance. That is why it is used as coolant in car radiators
drive it without coolant
If you mean engine coolant is getting into the car, the heater core is leaking coolant causing the coolant level to drop and that causes the engine to over heat.
If by water you mean engine coolant, yes. Loss of coolant, antifreeze, is a major cause of overheating.
It's probably coolant, not water, could be from a cracked radiator.
Always use antifreeze. Water does not have any water pump lubricants or anti corrosion properties, antifreeze coolant does.
you are low on coolant.