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Because engine coolant gets hot. It works through heat exchange - coolant goes through the system, absorbs the heat from the engine, passes through the radiator, then rapidly exchanges the heat to the air which passes through the radiator fins.

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12y ago

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Why is water going from radiator into overflow bottle?

Engine is overheating.


In a 2000 Toyota Camry you had steam and water was boiling into the overflow and temp was overheating what could this be?

It might the thermostat stuck close or the water pump does not work and has to replaced.


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It's steam from boiling coolant (or water) coming out of the overflow hose connected to the top of the radiator just below the level of the cap.


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Boiling milk contains fats and proteins that create a thicker, stickier consistency when heated, causing it to easily overflow and create a mess. On the other hand, boiling water is a simpler liquid with just water molecules, so it doesn't become as frothy or thick and is less likely to overflow.


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What is wrong when the coolant keeps disappearing but not visibly leaking?

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