serpentine belt on 1991 Saturn SL

evrytime i start my car the serpentine belt flys off then i put it back on and the same thing happens and every where i look it dont tell me what could be wrong with it

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2 answers
Are you using an after market belt? Or the cheapest? Opt for original equipment or a quality belt at your local parts store. Not all belts work . Let the buyer beware.
It could be a too long belt, a failed tensioner or incorrectly adjusted tension, incorrect belt routing, failed pulley, out of the line accessory. Can you feel any movement on the pulleys when the belt is off?


Zee