Orig appears to use an adhesive w/ a healthy clearance (not even remotely press fit.)
Agreed tig requires a teardown and cleaning. But a proper bond would require the same level of cleaning. Im still trying to get it out. I've got the harld bolts out, now just down to a stubborn hose that won't pop loose. If it won't come easily, then the decision is made for me
My only problem w/ epoxy is what kind. Im sure the factory/supplier did plenty of testing on whatever they used originally to survive thermal cycling and coolant. It can't get too hard or will crack due to expansion. At first glance it appears there was incomplete bonding (looks like a big spot missing on one side, but maybe that bit of glue was left inside the mating end.)
My problem w/ tigging is what alloys. Its a thick casting and a thin extruded elbow. IME, the casting will probably weld fine. Who knows what the extrusion is out of - likely 6 series but could very well be one of the others. Both ends are O-ringed, so heat distortion shouldn't be as big a problem. I can lap the one end back to square. In searching 6spd, some shops have welded in fittings to prevent recurrence.
Decisions, decisions...