Turn off the car, open the hood and locate the radiator. Don’t touch anything until the radiator and engine have cooled down, as you might get scalded from the hot liquids [source: pontiac]. Locate the coolant recovery tank. If the coolant is boiling, don’t do anything until it cools down.Click to see full answer. Beside this, how do I fill my car radiator with water? To add liquid to your radiator, follow these steps: Open the radiator cap. Look into the radiator fill hole to see how high the liquid level is inside. Add water and coolant, or pre-diluted coolant, as necessary. Replace the cap by screwing it on clockwise. Also Know, do you put water in engine coolant? In general, using water as coolant is OK for a short time or as a “get you home” alternative, but it does not have the anti-freeze and corrosion inhibiting properties of a proper coolant mix, so should not be left in the engine for any length of time, especially if you live in a cold climate. People also ask, does your car have to be running to put water in it? If you absolutely have to add water while the engine is still warm, pour slowly while the engine is running in neutral or park. Note that most cars require a 50/50 mix of coolant with water to prevent overheating, so you won’t be able to drive indefinitely with nothing but water.Can I use water instead of coolant?While water does help to keep your engine cool, it does not work nearly as well as coolant does. First of all, water boils faster and at a lower temperature than coolant. If it is winter, then you risk having your engine block crack if you run your engine with only plain water.
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