Starter goes "KLUNK"

I once used a couple bolts that were one size too small in that application and got exactly the same result you're having. I suspect the starter would get loose and ****-eyed just enough to jam after the first or second starting cycle. The worst part was that it started back in Washington when I installed the new mini and went "klunk" in the back of the moving van in Hilliard Florida when we tried to get the car out. Truck driver wasn't impressed!! I can't remember the bolt size.... good luck

l_A_p