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if its out of the top you might need a new cap they are pressurized
and sometimes the spring is bad
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∙ 14y ago
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Why is Water Boiling in radiator?
The water is boiling in radiator because it's temperature(radiator's) reaches the boiling point of water when the engine works for a long time.
Does adding antifreeze to a car radiator increase the boiling point of the water in the radiator?
Yes
How does antifreeze keep the water in your radiator from freezing and overheating?
It changes the freezing and boiling point.
Why Ethelyene Glycol is mixed with water in a radiator coolant?
The boiling point of the mixture is higher than the boiling point of pure water; this slows down the evaporation of the coolant.
Why does water in the vehicle boils even after the ignition is turned off?
If the engine has been running and is hot, shutting off the ignition allows the water in the water jacket to continue to be heated. Therefore, until the engine cools down below boiling temperature, it will continue to heat the water. Boiling is prevented by a couple of things; anti-freeze (which raises the boiling temperature) and the radiator cap (because water boils at a higher temperature when under pressure). If your car is overheating, you should not remove the radiator cap (until the vehicle is cool), you can be severely burned as the pressure drops rapidly, boiling the liquid and forcing it out of the radiator!
Why cars make boiling sound from radiator?
Because the radiator is provided with coolent which start boiling on absorbing heat from the engine.
Why does water in a radiator not boil until 110 degrees is reached?
Water boils at 100 degrees C. Using a radiator cap, the system holds pressure, raising the boiling point (Just like your grandmother's pressure cooker). Using the correct coolant mix of water and antfreeze also raises the boiling point.
Why does the water in a car radiator sometimes boil explosevly when the radiator cap is removed?
Water under pressure has a higher boiling point, if the water is already hot enough to boil it will suddenly erupt when the cap is removed and pressure relieved.
What does it mean when your water is boiling out of the radiator bottle but temperature is normal?
check your radiator cap chances are it isn't any good and you need to replace it because it isn't holding pressure.
How do you troubleshoot thermostat?
Take it out, should be somewhere on the engine side of the top radiator hose, undo the bolts on the housing and pour boiling water on it in a cup. It should open or for air bubbles when it is fully covered with boiling water.
Why would water boil in your radiator but the temp gauge is at normal?
Because the temp gauge is not giving you the temperature of the water/steam in the radiator. You may have a bad head gasket or a cracked head causing the coolant to have that boiling effect.
What is wrong if an Explorer 2000 XLT reads really hot and the radiator and hoses are really hot but the radiator is full?
Have you replaced the thermostat? The water in radiator should not be boiling! ------------------------------------------------------------------------------------------------------ Is your cooling fan/viscous clutch working ? (Helpfull)
