Check out harmonic balancer if it's ok. Mine went bad not a whole lot about 1/16" or less and it started making squeaking noise. I thought it was an alternator bearing, pump, idler, you name it. At the end of the day check out your belt for excessive wear or glossy spots, that'd be a sign.
95 YJ Rio Grande 2.5L 5-speed (We're at point "A". Where is point "B"? Who gives a sh..!?
02 Triumph Sprint RS 955i (speed junky)
04 Honda Odyssey EX (parent-mobile)