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Home » Public Forums » GMCnet » Sealing Intake Manifold Exhaust Crossover Question (Another Hair-Brained Question)
Sealing Intake Manifold Exhaust Crossover Question [message #141774] Tue, 30 August 2011 21:00 Go to next message
A Hamilto is currently offline  A Hamilto   United States
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Do the SS plates ever fail? It would be more expensive than the SS plates, but, other than that, would it make sense to weld cast iron plugs into the manifold openings? I read somewhere that someone had the openings in the heads plugged that way, but why not the intake manifold?
Re: Sealing Intake Manifold Exhaust Crossover Question [message #141784 is a reply to message #141774] Tue, 30 August 2011 21:52 Go to previous messageGo to next message
roy1 is currently offline  roy1   United States
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Hamilton wrote on Tue, 30 August 2011 19:00

Do the SS plates ever fail? It would be more expensive than the SS plates, but, other than that, would it make sense to weld cast iron plugs into the manifold openings? I read somewhere that someone had the openings in the heads plugged that way, but why not the intake manifold?



I filled my manifold with furnace cement (cause it had a crack in it). I welded the crossover with my wire feed welder. Not a great weld job as the manifold is cast iron but it backs up the stainless inserts real good. I used 404 Mr Gasket gaskets that I modified to accept the stainless inserts.
Roy


Roy Keen Minden,NV 76 X Glenbrook
Re: [GMCnet] Sealing Intake Manifold Exhaust Crossover Question [message #141800 is a reply to message #141784] Wed, 31 August 2011 00:56 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
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Welding cast metal is not something an average person can accomplish
without failer.
Ask a good knowledgeable welder.
The SS plate works as the heat does not flow past the plate.
It just pulses against it so the temperature build up is not as severe.




On Tue, Aug 30, 2011 at 7:52 PM, <roy@gmcnet.org> wrote:
>
>
> Hamilton wrote on Tue, 30 August 2011 19:00
>> Do the SS plates ever fail?  It would be more expensive than the SS plates, but, other than that, would it make sense to weld cast iron plugs into the manifold openings?  I read somewhere that someone had the openings in the heads plugged that way, but why not the intake manifold?
>
>
>
>  I filled my manifold with furnace cement (cause it had a crack in it). I welded the crossover with my wire feed welder. Not a great weld job as the manifold is cast iron but it backs up the stainless inserts real good. I used 404 Mr Gasket gaskets that I modified to accept the stainless inserts.
>  Roy
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Re: [GMCnet] Sealing Intake Manifold Exhaust Crossover Question [message #141801 is a reply to message #141800] Wed, 31 August 2011 03:48 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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I have never heard of anyone having a failure with the stainless plates.

Welding cast is a real PITA. You really need to heat the cast item in a furnace first, weld it, and then control the cool down over a period of hours.


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: [GMCnet] Sealing Intake Manifold Exhaust Crossover Question [message #141809 is a reply to message #141774] Wed, 31 August 2011 08:11 Go to previous messageGo to next message
Steven Ferguson is currently offline  Steven Ferguson   United States
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The plates do not fail, ever. I've pulled them after 20K miles and they
polished up like new. Zero corrosion.
On Tue, Aug 30, 2011 at 7:00 PM, A. <markbb1@netzero.com> wrote:

>
>
> Do the SS plates ever fail? It would be more expensive than the SS plates,
> but, other than that, would it make sense to weld cast iron plugs into the
> manifold openings? I read somewhere that someone had the openings in the
> heads plugged that way, but why not the intake manifold?
> --
> '73 23' CanyonLands
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Re: [GMCnet] Sealing Intake Manifold Exhaust Crossover Question [message #141839 is a reply to message #141800] Wed, 31 August 2011 11:12 Go to previous message
A Hamilto is currently offline  A Hamilto   United States
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jimk wrote on Wed, 31 August 2011 00:56

Welding cast metal is not something an average person can accomplish without failer.
Ask a good knowledgeable welder.
The SS plate works as the heat does not flow past the plate.
It just pulses against it so the temperature build up is not as severe.
Thanks Jim. If anyone has heard of a failure, I expect you would have.
I wasn't thinking about welding it myself, rather taking it to a place where they weld heads. They should be able to do the job.
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