Tig weld vs J-B Weld...LOL

You guys are right.

I was just thinking it over and had that crazy idea. Ya know it's not gonna get too hot, what maybe 235 degrees on the worst day, it's low pressure, maybe 15 lbs radiator cap dependent, and I won't be cranking on it with a wrench to tighten that fitting, they really only need to be snug, hand tight with maybe a smidge more with an aluminum wrench.

I thought there might be some kind of space age adhesive that would fit the bill.

I know J-B weld is far from space age though. LOL

Here's a crazy idea, drill through both pieces perpendicular while mated and ad a set screw or small bolt. That would take care of the "pressure" aspect, then apply a sealer like the JB weld to the contacting surfaces, what is that about 1/4" of contact area. Or just get it welded.