Bob, what does the belt look like when it’s damaged?
Is it a clean break?
Has it been worn in one location … or even wear all around?
I broke a belt in my Mazda early installation … what happened
was the belt jammed in the alternator pulley, i.e., it went too far into the
groove - it wore down in one location and finally broke. My solution was to
change the alternator pulley and buy two matching belts.
Jeff