One thing to remember when welding cast iron. If you are welding a
crack make sure you identify both ends of the crack and drill a small
hole at each end. This will keep the crack from getting longer or
spider webbing as it gets hotter. One trick we use to use was drill
the holes to fit a piece of drill rod and insert a small piece at each
hole then weld from center out to each plugged hole. This was to
prevent future cracking with age. Seen quite a few blocks done this
way.
BillB
----- Original Message -----
From: "Ken Winters" <kwinter@frontiernet.net>
To: "Dick J" <lsr_man@yahoo.com>
Cc: <Land-speed@autox.team.net>
Sent: Wednesday, June 07, 2000 9:17 PM
Subject: Re: Cast Iron Welding
> Dick
> You are on the right track. Last year brazed an Exhaust manifold on
a
> Hercules in a old air compressor and is working just fine. A nice
even
> preheat and long slow cool down is the key. Bury it in floor dry!
> Insulates and is nonflammable. Easier to clean than the oven. Arc
> welding with good cast rod works fine also. Preheat, weld a little,
peen
> the bead, weld some more, peen, etc, cool slooooow. Whatever process
you
> are most comfortable with. Find some cast and practice.
>
> Ken Winters
>
> Dick J wrote:
> >
> > Some of you guys are going to laugh at this,
> > BUT:........
> > (the only dumb questions are the unasked ones)
> >
> > What is the "current technology" on welding cast
> > iron? It used to be that you could heat it up in
> > an old oven (or your wife's kitchen oven), braze
> > it with brass rod, then cool it down slowly in
> > the oven. What's the hot lick now? I'm thinking
> > in terms of some OEM intake manifold modification.
> >
> > =====
> > ............................
> > .........Dick J.............
> > .....(In East Texas)........
> > .........# 729..............
> > .......Roadsters............
> > Hemis and Flatheads Forever.
> > ............................
> >
> > __________________________________________________
> > Yahoo! Photos -- now, 100 FREE prints!
> > http://photos.yahoo.com
>
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