ya, my serpentine belt squeals. its more annoying than loud. im deffinetly not that car that you hear from 4 blocks away squaling with high rpms.

my problem is when I start my jeep and its cold it doesnt squeal, but once it starts to warm up I have a squeal that isnt really all that loud. it always stops once i have my foot on the gas even just a little.

so its plenty tight and I bought some belt degreaser stop squeal spray and that didnt work.

so bearings? new belt? mines about a year and a half old

 

To check the belt I always just use a little water and poor it on one of the pulleys,if it stops it is the belt,it will not stop for long but you will know,if it is a bearing you will need to remove the belt and check all the components to see which one it is,unless you have a stethoscope.

 

hmm great test!