Hey, site never told me I had these posts so I'm just seeing this.Prairie Schooner, I glad you caught that “Bondo Comment.
This is an easy fix fix for JB Weld. Put the stud in to mold around, degrease the area. Put a lump of JB on; slide the pump into position to press the surface of the gooo flat; wait ; finally, gasket and gasket sealer, and, it should be fine for a very long time.
Those pumps are simple to rebuild. Wear inside the pump from abrasion can be a deciding factor.
I'm not super familiar with how JB weld works - would this not glue in the stud / the pump?