Question about Buick LeSabre
Perhaps if you could provide a little more information or observations, it might be easier to isolate the problem. For example, it appears you may have a problem with the engine overheating and then your engine dies when the extreme temperature is reached. When you start the engine, watch the temperature gage on the instrument panel. Does the temperature rise slowly (lets say over a period of 10 minutes or more) or does it rise quickly to the point of overheating (less than 5 minutes)? If the temperature rises slowly, it is probably just that the thermostat needs to be replaced. The thermostat is usually located in a housing where the upper radiator hose connects to the engine. If however, the temperature rises rapidly, that indicates a more serious problem. Your engine may have a blown head gasket which is venting hot exhaust gases into the cooling system causing the temperature to rise rapidly. I recently had this exact problem with my Chevrolet Venture which, like your Buick, is a GM product.
As far as the fan motor not coming on, the problem might be the fan motor itself. One way to test it is to connect the fan's electrical leads to a 12 volt power source like your car's battery. If the fan works, then the problem could be with the Engine Coolant Temperature sensor (ECT) which screws into the intake manifold. The ECT senses the engine's temperature and tells the fan when it needs to come on to start cooling. I hope some of this helps.
Posted on Jul 21, 2008
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Posted on Jan 02, 2017
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