I did the search ,i opened it up, check out my pics tell me if the motor is suposed to be like this?










It seemed a little dirty when I tried to clean it, but I can't put it back together will try tommorow. Im thinking that that dent is the reason alone and I shouldn't bother trying to put it back together.

 

those "dents" are normal. that's how they balance it, they grind down till it's balanced.