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Exhaust manifold to pipe dount adapter |
Post Reply | Page 123 4> |
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1982AMCConcord
AMC Addicted Joined: Jul/13/2012 Location: Kenosha, WI Status: Offline Points: 1286 |
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Posted: Oct/30/2020 at 1:29pm |
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OK Yes.. I understand... Yup...
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Nor Cal CJ5
AMC Apprentice Joined: Dec/03/2019 Location: Nor Cal Status: Offline Points: 126 |
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Yes - The flat one was installed by the exhaust shop because you didn't have a flapper valve and they probably had to extend the exhaust length to compensate for the lack of the flapper. The exhaust shop really has no idea of when to use a flat flange or a ball flange. The drivers side also originally came with a ball flange On the exhaust manifold side of the flapper valve, you need a flat gasket, on the exhaust pipe side of the flapper, you need a ball flange as the stock flapper came with a doughnut gasket (like the Mahle in your first post). This is the stock set up. Check the size of your manifold - I'm sure you are going to need the older version of the flapper valve. Also, the thickness of the flapper valve comes into consideration when the exhaust y-pipe length is determined (whether you use a flapper or not).
Edited by Nor Cal CJ5 - Oct/30/2020 at 1:37pm |
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1972 CJ5 304 2 barrel 3 speed
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1982AMCConcord
AMC Addicted Joined: Jul/13/2012 Location: Kenosha, WI Status: Offline Points: 1286 |
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I can look... Thanks for the tip... I didn't think of it even looking for a part number. I can measure the stud spacing but not the collector because their hooked up to the exhaust pipe.
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Nor Cal CJ5
AMC Apprentice Joined: Dec/03/2019 Location: Nor Cal Status: Offline Points: 126 |
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Do you have a part number for the manifolds? Can you measure the collector and stud spacing?
If you do have a later style exhaust manifold, you can use the later style heat riser flapper, which would be a good thing. The later style flapper has a built in doughnut for connection to the exhaust pipe.
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1972 CJ5 304 2 barrel 3 speed
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1982AMCConcord
AMC Addicted Joined: Jul/13/2012 Location: Kenosha, WI Status: Offline Points: 1286 |
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Nor Cal... My engine is a 72 but I'm certain that my manifolds are 74 and later! I didn't get these manifolds with the engine. I'm pretty sure they are Jeep versions.
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Nor Cal CJ5
AMC Apprentice Joined: Dec/03/2019 Location: Nor Cal Status: Offline Points: 126 |
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Just a FYI:
The heat riser flapper came in 2 sizes. The one that is more readily available is a 2" flapper valve and came on 1974 and up vehicles. The older style that matches up to the exhaust manifold you have is an earlier assembly and has a 2-1/4" flapper valve. The Fel-Pro 60133 flat gasket works on the older style flapper valve between the flapper & the exhaust manifold. I just went thru this with my 1972 304. After searching for a few months, I found 2 NOS flapper units (one in England) and bought them both. PM me if you have trouble finding one.
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1972 CJ5 304 2 barrel 3 speed
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1982AMCConcord
AMC Addicted Joined: Jul/13/2012 Location: Kenosha, WI Status: Offline Points: 1286 |
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Thanks a lot for the insight guys... I have found several links for them to purchase but no local parts stores can obtain them.. not even NAPA. Even the exhaust shop I used to install my exhaust system has had trouble finding them. They said they would install it if I can locate it but they won't even try to find them anymore. So next week I am taking it back to them to see if they can fix the leak at the donut for now. But next Spring I intend on getting the heat riser installed. Although they did not recommend it... I think that for my type of driving in the colder weather .. I really need to have it. It has been 30-40 degrees where I am right now and I am driving it all the time. I intend on driving it until just before the snow flies and the salt starts hitting the ground.
Can I ask you guys... what are the negative consequences of not having a heat riser but having a functioning heat crossover? I saw in another post where someone had so much carbon build up in the crossover port that it eventually pushed past the gasket and into the valley of the upper engine... and I definitely do not want that to happen to this engine in my engine bay.
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6762 |
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To my knowledge ALL Heat Riser Dampers/Valves or Exhaust Manifold Dampers/Valves had bimetal springs.
A list of AMC/Jeep numbers: 3225006, 3238998, 3225054, 3185114. Here is an article on operation and you can see that they were never intended to always be fully opened:
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White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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Because I've been looking for an exhaust crossover damper for sometime this interested me greatly. I did some research and found this particular one doesn't have a bi-metal spring, it's just a regular steel spring, so the damper doesn't function correctly, if at all. This taken from reviews I found on Amazon about the product. Now as far as the donut, that could be a very functional one. I didn't read anything negative about that. Is the original part as put on new cars equipped with a bi-metal spring??
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70 Javelin SST, second owner, purchased 1972
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n2ojoe
AMC Addicted Joined: May/04/2016 Location: Tecumseh, MI Status: Offline Points: 718 |
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I have used these Walker "ball flanges" along with stock replacement doughnut gaskets to replace flat flanges just like you have. No heat riser valve is needed, but could be used if desired.
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