[Vwdiesel] welding aluminum castings

[Shawn G.]

pouring in lots of tig rod also helps.  alloying ingredients or
something.  maybe the science geniuises know why.
Also, don't go too hot on your first pass, especially if there is oil on
one side.  you can always use silver solder too.  
Many auto castings are alloyed with magnesium too, and that can make
things a bit weirder.  Put a slice of magnesium next to your Al tig rod,
and fill er up.

Shawn.

Sandy Cameron <scameron at compmore.net> [17 Nov 2006 09:11 -0500]:
> At 12:03 AM 17/11/2006 -0600, you wrote:
> 
> >I told you that you cannot weld aluminum with oil on one side.  It has 
> >to be CLEAN, sheep dipped, dishwashered, whatever.  on aluminum 
> >castings, oil seeps out of the pores in the metal, you have to bust your 
> >butt to get it clean enough to weld, then preheat with a tig to drive 
> >the remaining oil out, wire brush it with a stainless steel wire brush, 
> >and set about welding, then it STILL oozes out of the casting.  I detest 
> >welding aluminum castings.
> 
> 
> Agree.
> 
> I clean as well as possible with brake cleaner, then B-J Weld. Fixed the oil
> drain in an old honda 4banger,  (plug took out the whole threaded boss with
> it) and it went all the way to edmonton, and may still be running.
> 
> Sandy
> 
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-- 
Shawn
actsiser at resist.ca