Don't drive your car w/o a flawless cover. It is a zero tolerance engine why risk it. I had a small chunk out of my cover and 3 weeks after replacing the belt it turned to spaghetti because of a little 1/4 inch piece of gravel getting in there and one part of the belt looked just like yours. 300 plus dollars down the drain for not waiting and buying a cheap cover. Look at every valley in the gears and see if there is anything lodged in there or a fractured/rough tooth.
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