Your water pump may need a lubricant. Water pump lubricant is added to the radiator.
When the weather is warm enough, and the engine runs hotter, then the thermostat opens more frequently, the lubricant will mix with the radiator fluid and circulate through the sysem lubricating the water pump.
I had squealing problem after changing the serpentine belt.
Tried changing idler sprocket, no difference.
I added the lubricant to the radiator, unfortunately the weather was cold, and the lubricant did not mix well with the radiator fluid, and did not circulate well do to cold weather and short drives.
Once the weather got warmer and the thermostat opened more often the squealing stopped.
SOURCE: ford ranger 4x4 excessive smoke from exhaust
you either have a crack in the head or cylinder walls
SOURCE: hi, i have a 99
could be the isc sensor,far as the smoke if it's black it could be the tps or maf sensor,have it checked.
TIM..............
SOURCE: Have a 1995 ford heavy 250, 7.3 diesel, recently
sounds like your fan clutch may be failing, remove the drive belt and manually spin all the pulleys by have listen for noise and feel for looseness in the bearings
SOURCE: 02 Ford Ranger has no power and high pitch squeal under hood
The alternator or ac is dragging down the serpentine belt ?
You could take the belt off and see if the noise stops.
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