Nickel rod in stick welder and CLEAN, CLEAN, CLEAN should do it.
I don't know of any epoxies that will withstand exhaust manifold
temperatures; perhaps furnace cement (only the black stuff is rated
high enough) would work.
HTH,
Donald.
> From: "Steve Carter" <steve@juggler.net>
> Date: Tue, 17 Jun 2003 10:03:20 +0100
>
> ----- Original Message -----
> From: "John T. Blair" <jblair@exis.net>
> To: <Spitfires@autox.team.net>
> Sent: Monday, June 16, 2003 12:06 AM
> Subject: Re: Exhaust manifold - welds vs epoxy?
>
> > As to welding the manifold. I'm no welder, but talking with many car
> buddies
> > at work, most manifold are cast iron. If so, they have to be handled a
> > special way, you just can't start welding on it. I'm not sure about all
> > the particulars, but one thing I seem to remember is that you had to
> preheat
> > the part before you can weld it.
>
> I know next-to-nothing about welding but from what little I *do* know:
> wire-feed welders need different wires for different metals. I have a small
> rig equipped for welding mild steel. I would need different wire to weld
> aluminium. Looking at http://www.daytonamig.com/consuma.htm there is no
> mention of cast iron, so that means you can either weld it with steel wire
> or you can't weld it :-) The "preheating" idea doesn't ring true for me WRT
> MIG welding, since MIG uses a high electrical current to cause a reaction
> between the wire and the piece. I can imagine it's true for gas welding,
> simply because a large heavy cast piece will act like a heatsink and make it
> hard to get the working area up to temp.
>
> Hope that's useful, though not definitive!
>
> Steve
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