The car was behaving like it needed a new thermostat, running hot and overheating. I replaced the thermostat and let it idle for about 45 minutes and it never got hot. Then I drove I drove the car for about 15 - 20 minutes at highway speed and it never got hot. The next day, after driving for about 30 minutes, the car overheated. It cooled down, I added coolant to replace what was lost and let it idle again for about 30-35 minutes. It never got hot. But after driving it for about 30 minutes, the temp shot up and it overheated, again. I went through the same drill and it doesn't overheat when idling, even for long periods of time, but after driving for about 30 minutes, it overheats. The heater works, and blows hot air so I don; t think it's the pump. What does this sound like?
Thursday, December 12th, 2013 AT 6:47 PM