re. Exhaust manifold welding tips + ceramic coating

[Jim Green]

--- Peter Berrevoets <pjberr at rogers.com> wrote:
> Martin Pajak welded my manifold up for me about six
> or seven months ago and
> it is still holding up fine.
>
> On the first attempt to do a mig weld, we were
> getting a very unsatisfactory
> looking weld so we used a barbecue to heat the
> manifold prior to welding. On
> the second try with the heated manifold, the weld
> was excellent and flowed
> smoothly from new material to original casting with
> an almost imperceptable
> change in appearance. It turned out looking 'picture
> perfect' and has held
> up much better than my head gasket (blown twice now)
> on this engine.
>
> Perhaps the uniform pre-heating of the manifold is
> the way to go on this
> kind of repair.
>
> My $0.02 cdn.
>
> Cheers!
>
> Peter


Exactly, it would then be a good idea to throw it back
in the bbq and let it slowly cool down.  That would
further prevent stress cracks.  Also have the flanges
machined flat.  Mine cost $15, although still cracked,
all the studs are still there and perfectly torqued.

Later,

=====
Jim Green
'89 90tq 034EFI, Haltech IG5
http://www.geocities.com/jeg1976/car_home.html

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