----- Original Message ----- From: "John T. Blair" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> 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 /// [EMAIL PROTECTED] mailing list /// Send admin requests to [EMAIL PROTECTED] /// or try http://www.team.net/cgi-bin/majorcool /// Archives at http://www.team.net/archive /// Send list postings to [EMAIL PROTECTED] /// Edit your replies! If they include this trailer, they will NOT be sent.
