Have a compression check if you haven't already as this is indicative of a head gasket or cracked head.
I have a head gasket tester and with the thermostat in it turned green water was bubbling...in water tank...now with no thermostat and water was nice and calm i couldnt get the solution to change off the blue....im thinking cracked head and only leaks when temps are high enough to boil water .....what you think ?
did you test the thermostat before you change it .
did you put the thermostat in the right way round
Have you checked to see if there is an air lock in the cooling system
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SOURCE: 1997 honda civic over temp. Have replaced
Generally if one hose is hot, and the other hose is cold it indicates that they water is not circulating. You could have a defective thermostat. Take the thermostat out and run the engine without it. With the radiator cap off you should see a lot of water moving through. It that is the case, replace the thermostat and you should be ok. If there is no rapid movement of water it may be the impeller on the water pump came loose. This is rare, but it can happen since the impeller is usually pressed on the shaft. You should also check and see if you get a lot of bubbles when the car is running and the cap off. This often indicates a blown head gasket. Hope this helps.
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