It will squeal if the bearing goes out-the most typical failure or lock up, throwing the belt or leak-from the front area of the pump.
It could grind, squeal, squeak, or make no noise at all.
It can be several things, either by themselves, or in combination. 1) the belt has dried up and isn't as grippy any more. This causes it to slip and squeal. There are sprays available to restore grip on belts which might help. 2) the belt has stretched a little, which causes it to slip and squeal. Retension, usually by adjusting the alternator position and it should be OK. 3) one of the auxilliaries(alternator, power steering pump, water pump) is about to seize. If it's harder to rotate the belt will slip and squeal.
That is simple... the one for the water pump... the belt goes around the crankshaft, over the water pump and around the alternator.
Loose belt? Low fluid? Bad pump?
i had a similar problem on a 1990 Chevy 305 with a SERPENTINE BELT. I had replaced my power steering pump, when all was said and done it threw the belt off twice. the pwr steering pulley was mounted correctly THE SHAFT WAS WALKING OUT from the pump enough to cause a loud squeal then there goes the belt. I had a defective pump. i know C.I. is way smaller then mine but i hope this helps
The pump bearings may be going bad or the belt could be slipping. Check to see if the belt is too tight or too loose.
the timing belt can cause a water pump to go bad if the belt is on too tight, because that will put stress on the bearings making it wear out rather quickly.
There is afew things that can make it squeal like the belt is worn and old or power steering fluid low or pump going out.
I had the same problem, so I took the belt off and washed it in soapy water. I then took a wet, soapy cloth and wiped off all of the pulleys. The squeal in my Aerostar was caused by a leaking power steering pump, which leaked fluid on the belt, causing it to slip and squeal.
the water pump is run by the timing belt the water pump is where the timing belt at in the motor
Loose belt -- replace or lubricate ADD-ON If it is a metallic squeal that continues for a minute or so after the car starts it could be your water pump bearing. Get your mechanic to check it out and replace before you need a tow truck.