Hi. I have a 2004 Buick Lesabre. The car started overheating recently. When the car was cold, I checked the coolant levels in the radiator and reservoir and they were both full. I replaced the thermostat and the car still overheats. I took out the thermostat and I am driving the car without one now. Without it the car does not overheat anymore but obviously I don't have heat. I inspected the radiator and while it could possible have internal damage or rusting it does not have any visible signs of damage or rust from the outside. I'm at a loss as to why the car overheats with the thermostat, and before I go buy a new radiator or go through the trouble of replacing the heater core in an attempt to fix it, I would appreciate it if I could get any thoughts or suggestions on what could be causing this problem.
Monday, January 14th, 2013 AT 12:16 AM