Absolute chaos will occur.
You never let a timing belt go that far that it will break. Many cars vary in the result but it can destroy the valves in the motor. What happens is that the piston continue to move as the valves are no longer turning with out the help of the belt and the pistons strike the valves and smash them as the no longer move out of the way in time. Hence the term, "timing Belt". It keeps the top and bottom halves of the motor in sequence with one another.
You never let a timing belt go that far that it will break. Many cars vary in the result but it can destroy the valves in the motor. What happens is that the piston continue to move as the valves are no longer turning with out the help of the belt and the pistons strike the valves and smash them as the no longer move out of the way in time. Hence the term, "timing Belt". It keeps the top and bottom halves of the motor in sequence with one another.