essexgirl wrote:
I would suspect the water pump more than any of the belts if your belt turns
your water pump aswell in same area. Doubtful to be the alternator bearings
as when they do start to go then your battery charge starts to go
intermittent thus showing your charging light on dash illuminating on and
off slowly as the brushes inside miss contact due to worn /warped alternator
shaft/bearings etc. To be sure i would fit a new belt at right tension then

Worn/noisy alternator bearings do not necessary cause any problems with
charging.
I own such a noisy alternator myself. The wear of bearings is big
enough to make noises (you can actualy hear it when turning by hand),
but still not big enough to upset the brushes. And never will be, as
the bearing with such a big play would simply fall apart.