1987 - 1996 F150 & Larger F-Series Trucks1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks
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hi forum...never having had to replace the water pumps in either of the 2 ford trucks ive owned, im not quite clear on the symptoms of one going bad.Heres whats happening. 93 F150 supercab, 302 , 117k miles.
Last night at intersection idling, loud screeching under hood (not the same type of "screeching" normally associated with bad belts/idlers etc(been there done that). dissappeared when accelerated, only happened twice on the several mile trip and 10 or 12 stops/intersections. This morning sitting at light, noticed steam type smoke vapor coming out from under hood on passenger side,nothing thick but yet a vapor anyway, stopped at store popped hood,couldnt see any steam. Looked over hoses etc trying to see if i had pinhole leak somewhere, couldnt see any, no dripping or puddles under truck either. Have noticed antifreeze resevoir empty for quite some time. I always fill it to "cold fill" level, usually within 2 weeks its empty again although looking thru filler cap of radiator level is near top.....im stumped,,,is my truck giving me indication that something "big" is about to go wrong? appreciate the advice!!
Water pumps usually have a weep hole where coolant drips out when the seal is bad. If you look at yours and its wet and/or stained you'll have your answer. If that's not it, you should look elsewhere if coolant loss is your only problem.
naturally look for the obvious as a water pump leaking at the weep hole. if that is ok, then get a pressure test of the cooling system. that will find where the leak is. could also be a intake manifold leak or a head gasket.
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