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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.

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Why does the water in a car radiator sometimes boils explosivebly when the radiator cap is removed?

Water boils at 212F at Sea level pressure, 14.5 psi or so. If the pressure is increased, so is the boiling point. This is how a pressure cooker cooks with water at up to 500 degrees, and how a nuclear reactor can heat water to almost 3000 degrees, without boiling. Also, water will boil at room temperature or less, if you reduce the pressure, such as applying a vacuum pump to the container. When you open that radiator cap, it causes a drastic change in pressure, a drop. If the water is only warm, just under 200F, say, it will likely just boil violently. If it is above the normal boiling point, that pressure was all that was keeping it liquid. This violent change from liquid to gas is known as flashing. It changes states of matter, and releases a huge and violent amount of energy. This flash is what turns the turbines in power plants, by the way.


Which is the supply line on a radiator?

The lower radiator hose supplies the water pump. The upper radiator hose supplies the radiator.


Why doesn't the radiator pull the water back from the reservoir even if the radiator cap is new?

If the radiator is not pulling water from the reservoir even with a new cap, there may be an issue with the radiator itself such as a clog, a faulty radiator inlet/outlet, or a malfunctioning water pump. It is recommended to have the radiator system inspected by a professional to diagnose and resolve the problem.


Why would a radiator lose water?

A radiator can lose water due to a leak in the radiator itself, a leak in a hose connected to the radiator, or a faulty radiator cap that doesn't maintain proper pressure. Regular maintenance checks can help identify and address any issues to prevent water loss.


Why is Water Boiling in radiator?

Water may boil in a radiator due to high engine temperatures, low coolant levels, a faulty thermostat, or a malfunctioning radiator cap. When the cooling system is unable to regulate the engine temperature effectively, the water in the radiator can reach its boiling point and create steam. It is important to address this issue promptly to prevent engine damage.

Related Questions

Why does the water in a car radiator sometimes boil explosively when the radiator cap is removed?

Because when the cap is removed the liquid inside wants to start cooling itself. The heat energy is released by boiling.


Does the radiator have to be removed to replace the water pump on 00 grand Cherokee limited v8?

yes


Can the water pump on a 1961 impala be removed without taking out the shroud and radiator?

just take the shroud off to give you a little bit of room to work leave the radiator in


Where is the oil pan drain plug for the radiator in a 1995 Mazda Protege?

There is a drain plug on the oil pan that when removed you get oil, and a radiator drain plug that when removed you get antifreeze/water. The radiator drain plug is located at the bottom of the radiator (very front of engine compartment). Typically you can find it by reaching up behind the front bumper and feeling for a large-ish wingnut. They are usually plastic, about the size of a quarter or half-dollar, and can be removed by hand.


Why is water boiling out of the radiator?

if its out of the top you might need a new cap they are pressurized and sometimes the spring is bad


How do you flush 98 Buick century radiator?

The radiator on a 98 Buick Century is flushed by turning the petcock to drain the coolant. Water is then flushed through the system until all contaminants are removed.


Removed thermostat why is jeep still over heating?

Coolant leak, plugged radiator, failed water pump, inoperative fan.


If there is water in the radiator then what?

there is supposed to be water in the radiator. your radiator is supposed to be evenly mix 50/50 with radiator fluid and water, preferably distilled water.


Does the radiator have to be removed to replace the water pump on 97 grand Cherokee limited v8?

The Radiator does not have to be removed, Just the fan shroud, then the fan and fan clutch assembly. When taking off the water pump it is very important to label where each bolt goes. If you put the wrong bolt in the wrong hole it will break the cam-shaft gear.


Why does the water in a car radiator sometimes boils explosivebly when the radiator cap is removed?

Water boils at 212F at Sea level pressure, 14.5 psi or so. If the pressure is increased, so is the boiling point. This is how a pressure cooker cooks with water at up to 500 degrees, and how a nuclear reactor can heat water to almost 3000 degrees, without boiling. Also, water will boil at room temperature or less, if you reduce the pressure, such as applying a vacuum pump to the container. When you open that radiator cap, it causes a drastic change in pressure, a drop. If the water is only warm, just under 200F, say, it will likely just boil violently. If it is above the normal boiling point, that pressure was all that was keeping it liquid. This violent change from liquid to gas is known as flashing. It changes states of matter, and releases a huge and violent amount of energy. This flash is what turns the turbines in power plants, by the way.


Where is the water pump on the jaguar xj6?

On the aj6 engine fitted to xj40 the water pump is at the front of the engine near the radiator. Easily identified by the water hose connected to radiator, and on early non electric fan models the fan is attached to the front of the pump and needs to be removed to access.


When filling up Water runs straight through into engine when filling up radiator?

only if the thermostat is stuck open or has been removed