Oh it's one of those couplings. I was scared to death I would break or crack the one on the missus vw. Anyway. I would have cleaned both of the surfaces profusely. Then apply rtv and let it cure for 2 hours or so. I can't see the actual damage so it must be slight. If that doesn't work and you don't want to replace then um. Cough chemiweld will plug it up.