| Re: [GMCnet] Exhaust manifold changing [message #325750 is a reply to message #325741] |
Sat, 04 November 2017 11:49   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
|
Senior Member |
|
|
Only thing I might add is to drill a small (1/16") hole in the ends of the
crack to prevent it traveling while you are brazing it. Slow cooling is
important. In my experience, brass works equally well as welding does. When
I am serious about saving the casting, I will do the same preparation as
brazing, but I use stainless steel rod and a tig torch and after cool the
weld affected zone with inert gas after the welding process. It displaces
the nitrogen from the surrounding air and prevents embrittelment. Old
welding trick that I learned from an O.T. (old timer). The stainless stick
rod flows very well, kinda like brass with an oxy/acetylene torch.
Jim Hupy
Salem, Or
On Nov 4, 2017 9:32 AM, "Terry" wrote:
> If you don't want to change the exhaust system right now and have access
> to a grinder, a torch, some brazing rods, and a 2x4 plank of flat wood, you
> can reuse the cracked one until you find another using its part #. If the
> bolt holes still line up, screw the manifold down through them to the 2x4.
> Clean that patch stuff outta the crack area and make a v notch all along
> the crack. Heat the manifold in an oven to get it uniformly hot and dried
> out
> and immediately braze the notch you carved all along the crack. Put it
> back in the hot oven to cool a little slower, and then check it out about an
> hour later. Not a forever fix, but I had one last a couple of years that
> way (until I pulled the motor) on a small block Ford.
> --
> Terry Kelpien
>
> ASE Master Technician
>
> 73 Glacier 260
>
> Smithfield, Va.
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
