72 choke stove

Old February 10th, 2019, 05:48 PM
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72 choke stove



What is this crust on the choke stove tubes? Also, the new replacement stove I have is smaller in length than this original one. Will it matter?

Last edited by 2slim; February 10th, 2019 at 06:09 PM.
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Old February 10th, 2019, 10:04 PM
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Originally Posted by 2slim View Post


What is this crust on the choke stove tubes? Also, the new replacement stove I have is smaller in length than this original one. Will it matter?
Classic example of a redox reaction (reduction-oxidation) where oxygen robs iron of electrons - forming rust. If this is the first time the stove-pipe has been replaced in 46 years, it should be expected to show plenty of rust. I replaced mine and it demonstrated the same rust. I believe my replacement was the same size as the original (I ordered from ILT). Did you order the correct replacement? Assuming you did, I doubt a very minor difference in size would be significant.
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Old February 11th, 2019, 02:23 AM
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The choke stove sits inside the exhaust crossover. That's not only rust but also combustion residue (carbon buildup) from the exhaust.
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Old February 11th, 2019, 05:58 AM
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  • Interesting, thanks.
  • My replacement was from Fusick. Looking at all the other parts folks, including ILT, they all appear to be the smaller/shorter version. Must not be a big issue apparently.
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Old February 11th, 2019, 08:48 AM
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That would be an easy 2 minute cleanup in my sandblast cabinet. Good as new and OEM to boot.
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Old February 11th, 2019, 12:20 PM
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Originally Posted by 2slim View Post
Looking at all the other parts folks, including ILT, they all appear to be the smaller/shorter version. Must not be a big issue apparently.
It's a metal tube sitting in the flow of 1100ºF exhaust gases, so a couple inches shorter isn't going to make much of a difference on the temperature of the air being drawn out of it and across the bimetallic spring in the choke housing.

So you are correct, it's not a big issue.
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Old February 11th, 2019, 01:20 PM
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Originally Posted by Fun71 View Post
It's a metal tube sitting in the flow of 1100ºF exhaust gases, so a couple inches shorter isn't going to make much of a difference on the temperature of the air being drawn out of it and across the bimetallic spring in the choke housing.

So you are correct, it's not a big issue.
Apparently there are two different styles,the long & short unit. Evidently they used the short unit when they made them. I have them brand new for $20 compared to $23 from Inlinetube. These are excellent repo's that fit and function fine and comes with the gasket.
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Old February 11th, 2019, 06:33 PM
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Thanks for all the feedback.
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Old February 12th, 2019, 08:06 AM
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Doesn’t inline tube repop this?
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Old February 12th, 2019, 02:14 PM
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Originally Posted by Burd View Post
Doesn’t inline tube repop this?
Yes, and it's shorter than OEM.
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Old February 13th, 2019, 06:36 AM
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When I put the heat riser block off plates in, we had to cut off the heat tube, my choke works perfect.
it was a Royal Hop up back in the day.
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Old February 13th, 2019, 08:06 AM
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I know a few F body parters, but I think the only parts that may work for you guys is parts from the 403. If they work.

Last edited by Burd; February 13th, 2019 at 08:09 AM.
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