Tig weld vs J-B Weld...LOL

I have a problem with Magnum water pumps poor "O" ring design.

The O ring is not really standard (flatted) and is held in by the just barely enough to seal force of the sheet metal tube held at one point of contact by a bolt on the other end.

Who TF designed that and called it good?

Next one I get I'll tap the casting and install a fitting as it should have been done on the original design.

Problem is, as with the OP, water pumps are kind of hit and miss quality these days, and tapping will surely void a warranty.