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That would be a clutch fan hub and bearing assembly.
Roller bearing
If you are sure it is a belt squeal and not a bearing on a pulley that is squealing, you can buy a belt dressing spray at an auto parts store.
Depending on the sound, it could be a slipping belt or a worn pulley bearing. A slipping belt is typically caused by a belt that needs adjustment or by a weak idler spring. A worn pulley bearing can be any of a number of things, the bearing on an alternator, an idler pulley bearing... who knows until you get into it. Also, sometimes a worn heater motor will make a terrible noise when it's cold, as can a radiator fan motor.
If the fan hasn't been changed, and is the correct one, it should not be hitting unless the bearing is worn in the waterpump, or the fan clutch is defective.
There is no fan belt it is an electric fan. Are you referring to the serpentine belt?
The Villager has an electric fan and does not use a "fan belt".
A serpentine belt is one belt that runs all engine accessories (i.e. power steering pump, ac compressor, water pump, AND fan). A fan belt runs the fan only.
fan belt needs tightened
There is no fan belt, they have electric fans.
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