Repair Exhaust By Brazing with Mapp Torch?
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Repair Exhaust By Brazing with Mapp Torch?

 
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Edge
Guest
Posted: Fri Nov 26, 2004 12:18 am    Post subject: Repair Exhaust By Brazing with Mapp Torch? Reply with quote
I've got a crack in an exhaust downpipe bracket that holds the O2 sensor for
the cat. Looks like one side of the original weld broke off the bracket and
left about 1/8" opening in the pipe. Anyone have experience using Mapp gas
to braze an exhaust? The exhaust is used, but there is still solid metal
there.

TIA

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scrapir
Guest
Posted: Sat Nov 27, 2004 3:09 am    Post subject: Re: Repair Exhaust By Brazing with Mapp Torch? Reply with quote
I've seen people braze on headers before without any problems. I'm not
sure how hot you need to be at to braze. You might need to use just more
then mapp gas. I would try it on something before your car and see if it
works.
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451ctds
Guest
Posted: Sat Nov 27, 2004 4:17 am    Post subject: Re: Repair Exhaust By Brazing with Mapp Torch? Reply with quote
Edge wrote:
Quote:
I've got a crack in an exhaust downpipe bracket that holds the O2 sensor for
the cat. Looks like one side of the original weld broke off the bracket and
left about 1/8" opening in the pipe. > snip

Some plumbers torches are hot enough, some not quite, but close. If
torch can melt rod, doesn't mean it can get metal hot enough for brass
to flow. Oxy Acetylence is best choice. Check with local muffler
shops, they MIG weld muffler metal, a MIG weld would be superior to
brazing. If it was my car, I'd make up a sheet metal patch, and
hose clamp it into place. [ winter repair ]

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