[oldeguy]

If the timing belt screwed. you'll have troubles starting, and eventually, the belt will break. and the car won't go.... the serpentine belt, or the accessory belt to some, will squeal, rattle and be very rude sounding, but is very easy, relatively, to replace. You may want to repalce the idler wheel or whatevwer the thing is called at the same time. The timing belt is somewhat harder and time consuming for the Do-it-yourselfer