Broken bolt removal - Mixed methods

I have a broken bolt in a Honda exhaust header.

It is broken off about 1/8" above the flange.

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Just enough to get a bite on it with some vise grips.

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First thing I am going to do is heat it up with a torch.

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Make the area around the broken bolt glow.

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At this point , work quickly, lock the vice grips in place, and wiggle, DO NOT try to superman the broken bolt out on the first try.

Soak in WD-40, wax, engine oil.
It will smoke and stink, and watch for flare ups.

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I was able to get about a 1/4 turn befor it locked up again and the vise grips kept slipping off.

Time to try something else.....

Get a nut that just fits around the broken bolt.

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I used my old stick welder and welded the nut to the broken bolt.

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Get a wrench on there, and keep working the bolt back and forth.

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I was able to apply more force applied to the broken bolt and get it out.

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Now with the broken bolt out, I can see why it broke.
A couple threads had gaulled, and sripped some.

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I will let the header cool, then install a Heli-coil.