Battery water being distilled water? Because Distilled water would be much better than tap water because it is free from all the impurities and junk that will get stuck in your cooling system but antifreeze still needs to be added.
Water
When a car is hot, keep the car running and add water to the radiator. When a car is cold, you can simply put the water into the radiator.
when the enjine was turnoff sometime and then open the radiator and fill it
Circulating water will not be sufficient and the car will overheat.
the antifreeze runs through all your water lines in your car . . . . you put it in your water tank or radiator
No, it is not recommended to put salt water in a car radiator as it can lead to corrosion and damage to the radiator, water pump, and other components of the cooling system. It is best to use a coolant mixture of water and antifreeze specifically designed for car radiators.
Enough distilled water to cover the plates. Do not open a sealed battery.
At the radiator or overflow tank. Do not add water, add coolant.
You don't put water in your radiator, you put antifreeze.
Because the electrolyte in a battery is a mixture of 65% distilled water and 35% sulfuric acid. Anytime you top off a battery you must use distilled water.
Get a new radiator or flush it out?
No, use a 50/50 mix of distilled water and the correct antifreeze depending on the model car you own.