So today my wife and I drove to Yakima and during our drive going up hill the temp would rise to 230*F with the highest being 237*F. Going down hill the temperature would drop to about 208*F-215*F. I have been noticing that the temp for it has been staying about 215*F-220*F on regular driving around our area but it has never gone beyond that until today. Prior to moving to Washington the X was always around 199*F-205*F when we lived in Calgary. We've driven the X everywhere and have gone hills higher than today and never had the temps go up to the range it did today. I had the water pump replaced last year so I doubt it would be the water pump. Could this be just a thermostat issue? I am thinking of having it flushed and get the thermostat replaced.