Pssst, don't tell anyone, I like JB Weld, use it for all kinds of stuff. I had a crack in an
oil pan that was seeping
oil, I wasn't sure that would hold (heat, vibration, hot
oil). Heck it worked out real well. Also used it on the seam of a gas tank, good to go! It don't get much respect around here...
I guess my biggest concern would be if the area wasn't prepped really good (clean beyond clean and into the sanitary zone) what if it came loose and the oil pump ate it?
I don't generally use any kind of epoxy in an area where something like that could happen. Heck you even hear about intakes with epoxy used for smoothing or whatever, and then a chunk breaks loose. Not good... Just something to consider.