At 01:07 PM 1/15/2011 -0600, Jim Stone wrote:
>I need to fill in a 1/8" hole in an aluminum intake manifold prior to having
>it powder coated. While much of the aluminum is around 3/8" thick, I don't
>think it is more than 1/8th or so around the hole. Right now, the hottest
>torch I have is an old MAAP Gas one that has served me well with small
>projects for many years, mostly plumbing. I just test brazed a similar hole
>in a piece of scrap (a bit thicker than the area on the manifold) and, while
>the resulting repair is invisible, I am not sure the brazing aluminum really
>bonded with the surface metal. Is simple MAAP hot enough for this
>application, or do I need to buy an Oxi-MAAP torch
>(http://www.homedepot.com/Tools-Hardware/h_d1/N-5yc1vZarnk/R-202185043/h_d2/P
>roductDisplay?langId=-1&storeId=10051&catalogId=10053)? Any other suggestions
>before I tackle it?
I just started to tell you that you can't braze aluminum but then I was going
to direct you to the stuff you need to gas weld aluminum and look what
pops up?
https://www.tinmantech.com/index.php
"Tips from the Tin Man" - Brazing Aluminum
On the Ask the Expert tab, there is also a link to repairing aluminum.
Kent White is one of the masters of metal work. The answer to your
question is here.
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