car is a 2003 toyota sienna. I wanted to check how much life the rear drum pads had left so i took apart the drum. the drum was frozen to the hub so i used m8x1.25 to get it off. it got it off but the area around the m8x1.25 screw hole cracked. The crack is probably 1/2 inch long from the screw hole. is this anything to worry about?