Question about 2003 Ford Explorer

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Overheating I have a 2003 Ford Explorer with 139,000 miles on it. The first 110K miles were in Texas...plenty hot but at sea level. The car never overheated. I have been religious about preventive maintenance. The car does not burn oil. I recently had the thermostat replaced and the main hoses as a part of routine maintenance becuase I noticed that it was running a bit warmer than usual. I have lived in UT for two years and drive at altitudes of 4,300 ft. above sea level and higher. Until recently it never overheated. I have checked and there are no signs of leaking around the hoses, the engine and the backfill tank for the coolant is not spewing. I have, on a few times recently, had to turn on the heater (set at HIGH) and blower (HIGH also) to pull heat off the engine. This quickly lowers the temperature. I have only reached the CHECK GUAGE level one time. It's impossible to run the A/C now and it's 95 in the desert. Is this a preview of a water pump failure on the horizon? I'd like to get it replaced before it goes. It is the original water pump.

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  • topaz buffal Jul 18, 2008

    There are no signs of leaking around the hoses or anyplace on the radiator. The cooling system overflow tank has no leaks in it or the hose that connects it to the radiator.

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Are you loosing coolant fluid? check for leaks around the hoses and in the radiator areas.

Posted on Jul 18, 2008

  • michael galang Jul 20, 2008

    I honestly doubt if the water pump needs replacing. it just propels water and coolant to keep the engine circulated unless your ford's water pump is operated electrically and not by the belts that is ganged with the engine. I have a toyota sedan, the water pump is belt driven with the alternator. The only time that it failed on me is when its water seal became history and thus leaking fluid all over. other than that it should have stayed on.

    You may want to try draining the radiator just to sample the water/coolant condition.. i'm suspecting a block inside the hoses or worse it could be inside the radiator thats why its not circulating properly.... like a faulty thermostat

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