over heats on 2003 Toyota Echo

I have a 03 Echo that over heats!Upper hose gets hot, lower hose stays cool! When car gets hot,coolant comes out overflow tank. Have replaced thermostat! Help?

Asked by for the 2003 Toyota Echo
1 answer 1 comment
You may have air trapped in the cooling system or the radiator could be plugged. There is the possibility that the head gasket is leaking. Another possibility is a failed water pump, that the impeller is corroded away or has come loose on the shaft.
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Thanks for the input! Turns out to be the head gasket! Thanks again