[DeTomaso] Brazing

[Jerry R Knotts]

It sounds like a flux failure (not Capacitor Flux).  Maybe the base that you 
are brazing to is not prefluxed enough.  I was taught to use Borax as 
emergency flux or a commercial powder flux.  Preheat the brazing rod and dip 
it in the flux for a good covering and preheat the area to be covered and 
sprinkle a small amount of flux on the area.  The preheat should be enough 
to liquefy the flux where it touches the metal.  I have never used the flux 
coated rods but they may have a moisture problem like fluxed weld rods.  You 
might put them in an oven for a few hours at a very low temp to remove 
humidity from the flux covering.

As usual YMMV,
jerry
----- Original Message ----- 
From: "David Fisher" <fisher95020 at gmail.com>
To: "DeTomaso Forum" <detomaso at realbig.com>
Sent: Thursday, October 25, 2012 2:46 AM
Subject: [DeTomaso] Brazing


> Any of you craftsman  out there that can tell me why my brazing is
> sometimes porous?  I am getting tiny little holes in the brass.
>
> Too much heat, oxygen, not enough, etc?   Anyone found any good online
> resources for this?
>
> I know it's a bit of a lost art, but I find myself doing it occasionally 
> on
> my Jaguar as that was the factory practice.
>
> Pic attached
>
> http://www.poca.com/index.php/gallery/?g2_itemId=38384
>
>
> Thanks
>
> David
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