Belt between water pump & alternator squealed and popped off - di

If the belt is not turning, there will be a seized pulley. Possible alternator.. power steering.... water pump... tensioner.... idler pulley ... AC compressor seized. The belt will need to be removed and all the pulleys spun by hand to isolate tone that may be seized

make sure that the pulleys of all the driven equipment are in alignment and not at a bit of an angle to the axis of the drive belt
To break belts something is not lined up properly or something is not turning freely

Replace belt tensioner, any other pullys, I worked on ? vehicle where the pully would spin but would stop every so often.

belts squeal for only 2 reason
it's bad. the belt.
or the accessorym it drives is Seized.

i guess you never head of a 5buck stethoscope
and listen to the accessory bearings, ah, alternator front and rear
i hear, front crying for help. easy as child play.
sold everywhere cars parts are sold.

there is no need to guess, , answer use tools.
this was true in 1920 and now, belts then and now all can squeal.
in the old days we had many belts and could drop them
then comes, SERP belts. one for all.
we dont have 1.3 swifts here, so cant see belt routing.

http://www.fixkick.com/tools/steth1.jpg

Belt tension is adjusted by moving the alternator away from the water pump. Loosen both alternator bolts (don't remove them) and place a pry bar or wooden handle between the alternator body and the engine block. GENTLY apply pressure to move the alternator away from the engine - when the belt has less than 1 inch vertical play, tighten the alternator bolts while maintaining tension on the alternator. If proper tensioning doesn't solve the squeal, then I would suspect the new belt is contaminated with oil or grease.

do you have a siezed tensioner pulley that could do it . remove the serpentine belt and check the idler puller, then the alt if it's siezed , the water pump pulley should turn freely also check what is siezed and making the belts squeel something's not turning.

It sounds like your water pump is going it usually vibrates throughout everything if it was your alternator it would show signs with your power the easiest way would to take your belt off remembering the belt route and spin the alternator pulley and the water pump pulley to see if they spin freely without noise

yeh, mine did the same thing with a hydralic belt. it was the bearings. mazda capellas use a lot of 6202 bearings which, luckily, are fairly cheap, and are commonly used in pool pumps. so you can find them at pool pump repair stores. although pool pumps use 6202 2RSR bearings. these are just the water proof type, but are excactly the same size and can be used.
to test if it is a bearing problem, remove the belt and try to twist the individual wheels by hand, you should be able to turn the 2 smaller ones.
from memory the alternator belt is in a fairly in accessable postition so the belt is going to be hard to put back on.try other things first, like wiping the inner side of the belt with a dry cloth to remove moisture.
worst case senario is your alternator has, or is starting to, seize up and you need to replace it.

right size belt ? cheap belt ? have battery tested

Let me know what you figure. I have changed alternator , water pump and belt on my daughters 2002 Spectra. . Still squeals. Currently assessing battery condition.