Exhaust manifold
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G.ARMS86
Topic author - Posts: 44
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Exhaust manifold
Has anyone seen this happen before? Out driving today at it happened
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TXGOAT2
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Re: Exhaust manifold
I've never seen anything like that. I've seen a lot of casting failures, but I've never seen such a neat one. The only thing I can think of, assuming that's not a modification made after manufacture, is that someone made a repair of some sort on a casting flaw, perhaps a plug pressed into a drilled-out blowhole.
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John kuehn
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Re: Exhaust manifold
There must have been a plug or drill hole for an accessory. That hole is to neat for a blowout.
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Mark Chaffin
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Re: Exhaust manifold
T-ermites!
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G.ARMS86
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Re: Exhaust manifold
John kuehn wrote: ↑Sat Nov 05, 2022 8:02 pmThere must have been a plug or drill hole for an accessory. That hole is to neat for a blowout.
[/quote as far as I remember there was nothing there and I'm leaning towards it was a casting repair that failed
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Mopar_man
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Re: Exhaust manifold
Would it be for a spark plug to light off some gas and make flames out the pipe?
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RGould1910
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Re: Exhaust manifold
An OF manifold that was once plugged???
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Scott_Conger
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Re: Exhaust manifold
prize goes to Richard...
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves™
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves™
Obsolete carburetor parts manufactured
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Fire_chief
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Re: Exhaust manifold
Found out that it was for a hot air pipe for an accessory carburetor. The hole was plugged, but not correctly.
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John kuehn
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Re: Exhaust manifold
Looks like the hole may be around 3/4” but that’s a guess. If you wanted to repair it instead of brazing it up you just might thread it and install plug or threaded bushing with a smaller plug. Others will have another method to fix it.
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G.ARMS86
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Re: Exhaust manifold
Oh ok well that's interesting
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Norman Kling
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Re: Exhaust manifold
I'd look for a better manifold. Last I knew they still made repros. I bought and installed one about 5 years ago.
Norm
Norm
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Jerry VanOoteghem
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Re: Exhaust manifold
Weird. Can you thread with a pipe tap and put a plug in it? At least as a temporary fix?
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Mark Gregush
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Re: Exhaust manifold
Maybe sell that one and get one without the hole. There might be someone out there looking for that exhaust manifold to complete their Stromberg setup.
I know the voices aren't real but damn they have some good ideas! 
1925 Cut down pickup
1948 Ford F2 pickup
1925 Cut down pickup
1948 Ford F2 pickup
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G.ARMS86
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Re: Exhaust manifold
Would you be interested in buying it then
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ModelTWoods
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Re: Exhaust manifold
Richard and Scott are correct. The manifold is one that either came with a Stromberg OF originally, or was modified to use with one. The hole is probably threaded, or should have been, for the valve that turned on or off, the heated gas to pre-heat the air to the intake manifold. The hold is in precisely the correct place for the valve. P.S. Original Poster, if you don't want that manifold, I'll trade you a perfectly straight original manifold for it, and I'll pay all the shipping on both.
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Scott_Conger
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Re: Exhaust manifold
a gentle correction to Terry...
there would be a drilled/tapped hole in the BACK of the manifold, with a stud coming out centrally, through the large hole in front. The whole mess would be secured with a wing nut on the stud...no threads in the large hole in the picture...
there would be a drilled/tapped hole in the BACK of the manifold, with a stud coming out centrally, through the large hole in front. The whole mess would be secured with a wing nut on the stud...no threads in the large hole in the picture...
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves™
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves™
Obsolete carburetor parts manufactured