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 .
In a car the water pump circulates coolant through the engine and to the radiator.
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.
The water cooled engine will typically be heavier, because you have to add in the water pump, the radiator and the water/coolant. The engine block itself may be lighter as there are passages drilled out for the water/coolant to flow through.
To circulate coolant through the engine block, radiator and passenger compartment heater core.
Water or coolant keeps the engine cool . -Some engines are air cooled.
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 radiator is used to cool down the coolant (water plus antifreeze etc) which in turn is used to circulate the engine and prevent it overheating.
If by water you mean engine coolant, yes. Loss of coolant, antifreeze, is a major cause of overheating.
If by water you mean engine coolant, yes. Loss of coolant, antifreeze, is a major cause of overheating.
A vehicles water pump circulates coolant ( water and antifreeze ) through the engine and to the heater core and the radiator. The coolant is warmed up in the engine and the coolant carries the heat to the radiator where it cooled down before being recirculated through the engine again.
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
Always use antifreeze. Water does not have any water pump lubricants or anti corrosion properties, antifreeze coolant does.