Every time i replace or adjust a v belt i dread seeing the leak. Twice i moved a bolt to adjust a belt, and had to do the gaskets. Im thinking better gasket adhesive next time and anti sieze to coat the bolts,also seals bolt threads.
Another option is to use long studs in the holes that go all the way through. That way, you are not disturbing the stud, but only breaking the nut loose. Just a thought.