Are they properly installed
the back of the belt runs around idler pulleys and the grooves in pulleys to be driven
check for something being driven is not seizing up
check for pulley alignment
Bad bearing on a pulley or not aligned.
You either have a pulley that is locked up or something out of alignment.
SOURCE: REMOVAL OF THE SERPENTINE BELT AND THE FAN BELT
you should look for spring loaded tension pully .in this pully you will find a square hole put a 1/2 inch drive ratchet (no socket) into this hole & apply pressure until belt loosens don't forget remeber the way belt came off
SOURCE: serpentine belt keeps shredding on the inside
PULLEY ALIGNMENT.WITH BELT ON LOOK AT THE PULLEYS FROM THE SIDE.U MUST HAVE A PULLEY THE IS MISSALIGNED
SOURCE: I have a 1999 Mercury Sable. The only problem I
take the belt off and carefully check to see if any of the pulleys are out of line and check to make sure they spin smooth and true check for bearing wear and noise in any of the pulleys cause it sounds like simply there is a pulley out of line
SOURCE: keeps shredding the serpentine belt how can it be
ther are three main reasons the belt shreds,belt on too tight,pulleys out of alignment,pulley(s)have narower V than belts fitted,(wrong belts)
when fitted the longest part of the belt between pulleys should flex about 1/2 inch with your fingertips,(not a lot of pressure needed).The other two are easy to see.remember when you fit, to use a long handed screwdriver/crowbar to tension . long means more control......
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