The other question is about the bolt that holds the belt tension on the alternator. The one that tightens up in the slot on the curved bracket. What size is that bolt supposed to be? A 5/16 18 bolt threads in easily by hand and seems to have the correct thread pitch, but it's a little loose in the hole as if it's too small for it. I know those bolts should tighten up solidly to hold the belt tension, but mine just seems wrong. I don't want to torque it for fear of stripping the threads out of the alternator.