The pump will need replaced if it is grinding.
The grinding noise in the front of a 1990 Dodge Caravan could be a cv joint. If it is, it probably only grinds when you take a sharp turn. There is one located on each side.
Bearing going bad?
A dodge caravan may be experiencing rear brake noise due to needing new brake pads. This may also be due to worn rotors.
New CV joints will fix the grinding noise
drive belts tensioner/under chassis
I have the same problem if it was making a grinding noise contact ego-fly if its not making a grinding noise the rotors might be hitting each other
Loose sub frame mounts, broken motor mount. engine misfire. broken transmission mount.
Transmission mount
I am not sure if that is what the problem is i changed the oil and overfilled it now my van is making a funny noise once it heats up
engine problems not trans.
Its usually a U joint. Click under acceleration . While turning,a CV joint. Grinding or moaning is usually a bearing.
Sounds like you need a water pump, The bearings in the water pump are making the noise not the pulley.