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after driving car for 10 minutes everything comes out the over flow on 1994 Geo Prizm

car has new radiator themastat taken out all hoses are getting hot some reason the car drives for about 10 min and everything comes out the overflow the fan is working and car is not over heating

Asked by for the 1994 Geo Prizm
Have the radiator cap tested, and maybe a running pressure test done.
how do i do a pressure test ?
There is a tool to use, maybe o'riellys or someplace will rent you one to use. Is the original cap
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1 more answer , 1 more comment
Thermostat has got to be in place or coolant flows too fast to be cooled by the radiator!! Put a new stat in it as well.!!
i put 3 new one in still the same