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Because you dont have the engine running

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Q: Why is the radiator cap not getting hot?
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How do you add antifreeze to a hot radiator?

You don't. Wait for the engine to cool down to avoid getting burned before you open radiator cap.


You replaced your radiator and now your radiator is leaking from the cap and is getting hot?

You suck repairing your vehicle and most likely the radiator was either faulty or you messed it up in the process. Either that or you got a part that does not match your vehicle. got radiator from napa and had mechanic replace it also upper and lower hose and thermostat so why is it getting hot and leaking from cap?


Never open the radiator cap when the engine is hot?

A radiator cap can not only be hot, but it is holding in pressure. When the cap comes off under pressure, hot antifreeze will spray out, possibly causing injury.


Why isn't the Radiator not getting hot?

THAT MEANS THE RADIATOR IS GETTING HOT, Probably you mean Why isn't the radiator getting hot. could be becaused the thermostat isn't opening or the house to the radiator is disconnected or there is no coolant in the radiator,


Where do you put stop leak in radiator if there is no radiator cap?

On most cars if they don't have a radiator cap, then you can put it in the cooling system by pouring it in through the upper radiator hose. Even if you are suppose to do this while engine is hot DO NOT because it will have the same affect as pulling the radiator cap while hot.


Why are you getting moisture around your radiator cap?

The cap is faulty, replace it.


Where is the radiator cap on a 1999 Volvo S80 Turbo?

There is a white tank up by the passenger's side fender. This is the reservoir for the radiator. Do not remove the cap while the coolant is hot. The radiator itself does not have a cap on it.


Is the thermostat the problem when my 1998 Pontiac transport overheats and the top radiator hose isn''t getting hot and the heater blows cold air?

It could be the thermostat. Open up the radiator cap when it is hot and see if the water is flowing in the radiator. If it is not then it may be a thermostat.


Why does the coolant boil in the surge tank but the temp gauge don't go to hot on a 1994 Chevy Caprice?

It could be that the radiator cap is not able to maintain pressure. Check the radiator cap for cracks or any other damage. Replace if necessary. DO NOT remove the radiator cap when the engine is hot.


Why is dangerous to remove the radiator cap of a car when the engine is still hot?

Hot water in the radiator is under pressure and can burn you.


Do you check radiator fluid when car hot or cold?

Do it when the car is cold if the radiator is hot fluid may be forced out when you take off the cap.


If a car is overheating will radiator cap be hot?

most likely it will be hot so put snow on it