Rep Power: 0

i have a 2005 honda civic ex. the main issue i'm having is that it is blowing coolant back out through the reservoir and does it only when i'm driving on the interstate or anywhere really just when i'm at higher speeds. its not over filled that i know of because its blowing enough out to cause it to occasionally run hot on me. but i haven't been able to figure out the cause of the problem.

i have changed out the radiator and thermostat already.

so any help would be much appreciated. thanks

 
Rep Power: 313

Your head gasket has failed and needs replacement. I am 100% sure this is your problem