what happens when your serpentine belt breaks
First of all if the timing belt  breaks it can hurt the engine. A value can be open when it should  closed and it can be hit by the piston. â¦ The serpentine belt  breaking and wrapping around the crank shaft is HIGHLY unlikely to  cause the timing belt to break. The crank shaft supplies the pull  and push to the timing belt not the cam shaft. You would have to  cause the crank to stop immediately to have any chance of it  breaking the timing belt.