Re: Sports Sedan Comes Home.....!

[Mark Denovich <mark@domain.elided>]

Hanne, Gregg wrote:
> 3.  Anyone had success welding cracked exhaust manifolds?  Was 
thinking of
> brazing it but not sure what effect the repeated heating-cooling of the
> manifold would have on the braze.

This question comes up often on sci.engr.joining.welding   Do a search
on groups.google.com for cast iron manifold welding, and take any advice
that Ernie Leimkhuler gives.

A summary of the process is:  grind a v-shaped groove following the
crack, and make sure it is clean.  Pre-heat manifold to about 400F,
braze with a high-nickle content braze.   Tig-brazing is an extra nice
way to go.   After brazing bury the manifold in vermiculite, fine ash,
etc... something that will insulate it, allowing it to cool very slowly.

I'll make it even easier for you:
http://groups.google.com/groups?hl=en&lr=&ie=ISO-8859-1&safe=off&q=cast+iron+manifold&meta=group%3Dsci.engr.joining.welding

	--Mark

BTW where is this Milano?  I could use a few small bits from it
(passenger rear side-marker light)
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