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Replace the radiator cap with the proper OEM cap. Be sure and use the exact same pressure cap. If this happens again after replacing the cap, then you need to do a complete service of the cooling system. Drain, flush, replace thermostat, refill with a 50/50 mix of the proper coolant and distilled water, and bleed air from the system. Also inspect cooling fan and water pump for proper operation.

2006-07-29 15:52:09
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Q: What would cause antifreeze to boil in overflow tank in 2003 Chevy Venture happened twice now and neither time has the temperature gone up to the red area and engine overheating light hasn't come on?
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Related Questions

What does it mean when coolant in overflow tank is low and is leaking antifreeze from that side of the car?

The overflow tank is either cracked or its overheating and leaking from the cap


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Engine overheating will cause the anti-freeze to surge into the overflow tank. A blown head gasket will also cause the anti-freeze to surge into the overflow tank.


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First thing would be to check if you have enough and correct water/Antifreeze mix in the overflow tank.


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no you need to replace temperature sinding unit


2003 ford Escort ZX2 coolant overboils into overflow bottle temp gauge shows it is not overheating?

THATS WHAT THE OVERFLOW/EXPANSION PACK IS FOR. WHEN ANTIFREEZE/COOLANT BEGIN TO BOIL IT EXPANDS AND IT NEEDS A PLACE TO GO. THERE FOR IT GOES IN TO THE OVERFLOW/EXPANSION PACK. THIS PREVENTS DAMAGE TO THE ENGINE/RADIATOR AND OVERHEATING. THERE IS ALSO THE POSIBILITY OF A MALFUNCTIONING SENDING UNIT/GAUGE.


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Antifreeze has to be put in at the overflow bottle.


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The most common cause of overheating is a thermostat stuck in the closed position. However, other causes are: faulty water pump, clogged radiator, clogged hose(s), coolant leak or a broken drive belt. I had a 1987 legend with around 160K that was overheating. Antifreeze would boil out of the overflow. I changed my radiator and it fixed the problem.


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It is added to the overflow tank.jd


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pour it into the overflow tank


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.


How do you know if you overfill your antifreeze reservoir?

Once your vehicle is warmed up, if you have antifreeze coming out of the overflow you have too much in your radiator.


Why is Yamaha banshee overheating and leaking fluid from overflow?

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when your engine is hot it causes the water to boil and the water and the anti freeze will come out of the overflow pipe.


Can you use a turkey baster to remove excess antifreeze from the overflow?

Yes but I wouldn't use it for anything else after that, seeing as antifreeze is very toxic


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Antifreeze is added to a 2005 Honda Civic at the coolant overflow tank. Antifreeze is added at a ratio of 50/50 with water for optimal cooling.


What will happen if you put too much antifreeze in the overflow tank?

Nothing. It will not hurt anything.


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perform a compression test to check for leaking head gasket- you may have caught this before any major damage occurs,