From: Bob Ternes (racecadet@yahoo.com)
Date: Thu Jan 06 2005 - 16:05:13 PST
Boy. I had a big post typed up but deleted it in
retrospect, since welding to cast is voodoo tech.
You should know what sort of casting it is, and
then understand the need for preheat and slow
cooldown and a whole heap of techniques.
Welding to cast is an art. I'm not saying this
because I make beer money at this on the side
(I'd say the real art is getting other people to
pay for your beer in the first place), but
because to explain the tech on it for 100%
positive results would be difficult. How to
identify different casting materials, when to
grind out, when to v and when to burn a hot
autogenous weld with filler to keep the puddle
going, what to look for when preheating, how to
stop porosity and what alloy or hi nickel rods to
use when, when you want to pin and butter bigger
pieces, this is a whole chapter. Then there's
always the option to braze or do that powder
stuff, which as a TIG guy I instantly mistrust
(I'd rather run something like silicon bronze rod
and 7 amps with my torch than braze to join even
something like copper air lines and steel). ;)
Doesn't matter anyway (is a "moot" point in the
proper contemporary parlance of the list), since
you want to keep the mani on the vehicle anyway.
Bottom line is that you should take a look at
"Pyro Putty" if you want to do a cheap repair on
the vehicle. Probably will hold, and even if it
doesn´t, well, you end up pulling the part for
the welding repair you would have ended up doing
anyway.
Cheers
Bob Ternes
Semi Professional Differential Shaver
--- 42Ford GPW <ilovejeeps@hotmail.com> wrote:
>
>
> What is the best way to repair exhaust manifold
> cracks?.....by this I mean a
> repair done by
> still keeping the exhaust manifold on the
> engine!
>
> Is JB Weld still the best option ???
>
> Thanks
>
> Mike Curtis
> 1942 GPW(2) 1943 WC-52
> 1942 MB 1943 WC-56
> 1944 MB 1951 M37
> 1951 M38 1963 M37-B1
> 1955 M38-A1 1968 M35-A2
> 1972 M151-A2
> 1942 OPEN CAB LWB CCKW
> FORD GPW SPARE PARTS/BOXES/TAGS, ETC.
>
>
>
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This archive was generated by hypermail 2.1.4 : Sat May 07 2005 - 20:39:26 PDT