MIG BRAZING?

[2000CS]

Having enthusiastically undertaken an involved project recently, figured I should refresh my welding skills and asked for advice from some welding pros.
Was surprised to hear about MIG Brazing. Remember torch brazing from old days, but to hear "manufacturer recommended" and "specified" felt compelled to find out some more.
Low distortion, low heat, less likely to ooze rust out of pores and other good thoughts.

A video discussing process; I'm sure there's better:

There's an official I-car class (feel free to skip this one)

Has anyone had any experience with or exposure to this method? Intended use is for typical CS panel repair - patching - rust holes.

 

[JFENG]

AFAIK, brazing was used on some BMW’s of that era. I had three 2002’s and the joint between the radiator support panel and the front fenders was brazed. I think the top
Of the quarter panels may have also been brazed near the rear window frame. I have brazed with OxyAcety, but the video you linked makes MIG look just as easy. I am tempted to buy a pound of silicon bronze rod and try tig brazing some stainless to some mild steel.

 

[eriknetherlands]

Yeah, I've always had this urge to give it a try. reviews seem good, as it is appearently plenty strong, and introduces less heat vs conventional MIG welding.

Also the E9, at least on mine, has some welds that were made with the yellow-isch stuff, which i think is silicon bronze as well. (Or is it soldered?)
I found it on the door skins and front fender.

Driver door: corner of top side to lock side. Here the inner door has a little 5*15mm tab that is folded 90 degrees, and then merged to the outer skin with a thick yellow blob effectively hiding it's shape. The left side of the pic shows the door+skin and some yellow stuff barely visible. The right side of the pic has the other door with the outer skin removed, and the tab visible that was dug out:

here the yellow stuff a bit petter in a pic; It doesn't fotograph really well due to the reflections. to the naked eye the yellow is more yellow:

Driver door, top side, near A-pillar, looking down into the door:

Also, on the front outer fender there was a yellow blob where the thin, long vertical panel is pinched to the outer skin, just under the waist line. It's the part of the fender that's visible with the door open along the A-pillar.

These were parts of my car that i believe were untouched, as all spotwelds were still original there.

 

[JFENG]

some welds that were made with the yellow-isch stuff

All those look like brass or silicon bronze brazing. Brazing, as I did it, was very close to soldering. Soldering wicks into a tight fitting joint where brazing has more strength in the brazing material and thus the fillet becomes structural. I stopped doing this when I moved 28 years ago (Oct acetylene belonged my friend). Now I have a small TIG and will try it with that first to fabricate part of an exhaust system.