2001 Taurus SE overheating 135K
About a month ago it started overheating. I replaced the thermostat but no relief. The fans kick in when the AC is on even when the engine is not warmed up (good!) and seem to run fine when the engine is hot enough for them to kick in, AC running or not. When the temperature "needle" almost pegs on the high end, the AC will shut down. So apparently whatever temperature sensor that shuts down the AC is also working fine.
The guy at Autozone was thinking that there may be some blockage in the radiator. I drained it last night and the antifreeze came out really clean. After the flush the same results - no sludge, rust, residue, metal shavings, nada, zip, zilch.
I haven't driven it yet but since everything came out so pristine I don't expect the flush solved anything related to overheating.
I saw some posts about impellers disintegrating on late 90's models. Any reports of similar issues on 2001 models? I can't see the weep hole but there does not appear to be any evidence of fluid loss below the water pump shaft.
I hate to replace the water pump on the "hope" that will solve the problem. That's a bunch of work and I'm sure the replacement pump won't be free.
Any suggestions, cures or advice is greatly appreciated.