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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.

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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


Why would a ninja 250 be overheating?

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


Why does antifreeze surge in the overflow tank of a 99 Chevy Suburban?

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.


Would antifreeze coming out of the overflow cause the temperature gauge not to work?

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.


Why is a 1991 Chevrolet Corsica spewing antifreeze out the reserve overflow when the temp gauge says its not overheating?

AnswerIs the system overfull?, Is your gauge working?I had the same problem and I had to replace the head gaskets.


How do you put antifreeze in a 97 Ford Expedition?

Antifreeze has to be put in at the overflow bottle.


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No


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Engine is overheating.


Can you add Antifreeze to the overflow tank?

Yes you can. When the car reaches a certain temperature it will suck it out. As a matter or fact most newer model cars they tell you to add it there.