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If there is no leak visible so you can see antifreeze under the parked car, you probably have a head gasket going bad. You may have some signs of steam in your exhaust, or at least a sweet smell coming from the exhaust. You should have a compression test done on your engine.

That is exactly what the overflow reservoir is for. When the engine is hot, excess coolant goes into the overflow tank, as the engine cools,it draws coolant back into the radiator.

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Q: Why would your radiator suck up antifreeze from the over flow?
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How do you get over flowed antifreeze out of radiator?

You really do not need to. Put the cap on and run the engine, the excess will flow into the overflow canister.


Why does your 1990 blazer keep overheating you replaced the radiator thermostat and water pump and you have no leaks except from over flow when its hot and no antifreeze in the oil?

Bad head gasket or... Crack in exhaust port in head. Check exhaust for presence of antifreeze smell or exhaust gas in radiator.


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How does the overflow tank work?

if your water/antifreeze gets to hot it pushes out the over flow tube into the overflow container, as it cools down it will suck it out of the overflow and back into the radiator.


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Where you add antifreeze on a 1999 Chevy Malibu?

in the over flow tank


99 cadillac antifreeze keeps running low?

it sounds like your coolant over flow tank is leaking. it is a common problem with these cars. might also check your radiator for leaks or your exhaust for coolant, but if there is coolant in your exhaust that would mean blown heads


Would a cracked blocked cause a car to bubble antifreeze inside the over flow in a 97 Ford Taurus?

would a cracked blocked cause a car to bubble antifreeze inside the reservoir of a 97 ford taurus ?


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What are the signs of thermostat need replaced?

The best indication of a bad thermostat is when the radiator fluid (Antifreeze) boils over from the reserve tank, not the radiator. This is caused by the thermostat not opening at its preset temperature and all the extra antifreeze is pumped directly to the reserve tank. You will also have loss of power and the vehicle will likely stop running soon after the antifreeze boils over.


What are some of the problem that causes a 97 cadillac to over heat and leak steam and loses antifreeze?

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How do you change antifreeze in a 1300 vtx?

I changed the antifreeze in my bike and according to the manual, it says to add only through the port under the seat. That port goes to the overflow bottle underneath. There seems to be no siphon to draw it into the radiator. I know this because I rode the bike until the coolant light came on. Checked the bottle and it was still loaded with antifreeze. Only other was I can think to add it is to remove the hose about the radiator and add directly to the radiator. In the meantime I have more that I need in the over flow bottle. It does drain out to the ground if you try to add more than it has capacity for.