Absolutely not!! Unless you want to replace the engine. Water does horrible things to engines and that is the reason water isn't used for engine lubrication and pure water isn't used for cooling the engine in the first place.
In a car the water pump circulates coolant through the engine and to the radiator.
The engine of a car contains many passages through which water can flow. The water picks up excess heat from the car engine and then passes through the radiator, where it is cooled by the rapid flow of air. The cooled water then returns to the engine to pick up more excess heat. So to put it simply: the radiator cools the water which cools the engine.
You are. Don't drive through a flood. A car engine was not intended to be submerged in water, particularly dirty flood water.
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.
The water does not explode because it changes form to a gas (steam). The hot steam then escapes through the pressure releases built into a car engine.
Usually cheaper to change an engine, but then you have an old car with a new engine.
You can not, and should not drive a car that has a bad water pump. The water pump pumps coolant through the engine. You engine will overheat and die without a functioning water pump.
It doesn't.
Yes, you can wash your car engine with water.
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.
The thermostat would be the first thing I would check.
Yes, all of them do. The most common liquid that conducts thermal energy is, of course, water. We put water - with a little ethylene glycol (anti-freeze) - into the radiator of your car. When you start the car, the engine gets hot, because of the gasoline and air exploding in each cylinder. Water running through the cooling manifold picks up the heat and cools the engine. The water runs through the heater core of your car and some of the heat is transferred to the air blowing into your car. The water then goes back into the radiator, and the heat from the water is transferred to the air going through the radiator. The now-cooled water goes back through the engine.