It's raining, so I haven't been able to really look at it. It's good that it rained though, because I was putting the cover on and noticed a large oil spot. Otherwise, I would've hopped on and went for a ride. So the bolt doesn't screw back in and I can wiggle it a bit. If you look at the picture it looks like the upper threads are filled with something. Maybe the previous owner used a Helicoil? If it was previously fixed, would I be able to have someone re-thread it or is it time for a new cover?