replace the water pump, contours are made with a water pump that has a plastic impellar (stupid if you ask me). the impellar chips and breaks away, leaving no flow. my car had the same overheating problem, i instantly changed the water pump to a Napa "METAL IMPELLAR" water pump. the car runs cooler than it ever has b4, oh definetly replace the thermostat with a new one!
