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RE: [TR] cast iron welding question - 4A exhaust manifold

To: <triumphs@autox.team.net>
Subject: RE: [TR] cast iron welding question - 4A exhaust manifold
From: "Randall" <tr3driver@ca.rr.com>
Date: Wed, 22 Nov 2006 18:39:39 -0800
> I have always understood that welding (or attempting) cast 
> iron is a waste  
> of time as the expansion rate of the metal is significantly 
> different than the  
> repair and it will only crack again.

Which is why all the mucking about with special rods (to get the expansion
rate) and pre-heating/post-slow-cooling (to minimize resulting stress in the
weld).  I have seen a manifold that was successfully welded, but the guy
that did it was an expert in cast-iron welding, not just some local "weld
anything to anything" shop.

And it wasn't a manifold you could buy for $50 used.

Randall


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