Pure distilled water.
No, use a 50/50 mix of distilled water and the correct antifreeze depending on the model car you own.
You should use distilled water in all appliances where water is heated. Tap water contains mineral salts that get deposited on heating elements and within pipes. Distilled water is purified to remove these things and this lengthens the life of the equipment.
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.
Distilled water IS good for radiators. In fact, manufacturers recommend using nothing but distilled water to mix with antifreeze. Tap water contains minerals, which can promote corrosion. So tap water should be used in a cooling system only in case of an emergency.
The cooling system contains a 50/50 mixture of anti-freeze and distilled water. This coolant is stored in the radiator and overflow tank. The battery contains a 35% mixture of sulfuric acid and 65% distilled water. The windshield washer resivoir contains a mixture of distilled water, detergent, and an anti-freezing agent.
Any grocery store sells distilled 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.
The electrolyte is 65% Distilled water and 35% Sulfuric acid.
distilled water
If you mean the water in your radiator, don't drive your vehicle until it thaws or your engine will overheat because no coolant will be flowing through it. You should keep 50% antifreeze and 50% distilled water in your car radiator at all times. (maybe slightly more antifreeze in cold winter weather) Water in the radiator won't freeze with antifreeze mixed with it.
Not recommended to use straight water. You should add a mixture or 50% each of water and Anti-freeze when the coolant level is below the add mark on the reservoir. Use only distilled water to prevent minerals from corroding the radiator.