You might not be able to see it, but an accessory drive belt is always both speeding up and slowing down.
It doesn’t matter if it is a v-belt, serpentine belt or stretch belt, all belts need friction to operate.
Replacing the belt rarely stops the noise on its own. This video is sponsored by The Group Training Academy.
The serpentine drive belt system is actually made up of a set of sub-systems, designed to work in concert with one another.
The serpentine belt is part of a system and is not the only component susceptible to wear. The tensioner, idler pulley and, on some vehicles, the decoupler pulley all wear over time and need periodic inspection and replacement. If you are replacing just the belt without looking at the other components, you could be sending a new belt to a premature death.