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

by in Providence, RI on March 15, 2014
2 answers 3 comments
ANSWER by on March 15, 2014
Have the radiator cap tested, and maybe a running pressure test done.
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COMMENT by on March 15, 2014
how do i do a pressure test ?
COMMENT by on March 15, 2014
There is a tool to use, maybe o'riellys or someplace will rent you one to use. Is the original cap
ANSWER by on March 15, 2014
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.!!
COMMENT by on March 15, 2014
i put 3 new one in still the same