Slant Six Forum :: Manifold Heat Control Valve, Spring Broken

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Manifold Heat Control Valve, Spring Broken https://slantsix.org/forum/viewtopic.php?t=66858	Page 1 of 1

Author:	Odin1274 [ Tue Oct 25, 2022 8:06 pm ]
Post subject:	Manifold Heat Control Valve, Spring Broken
How do I replace a broken spring on the manifold heat control valve? I recently got a 65 Barracuda. It has a .40 over rebuilt 225 in it. It appears to have a stock 1bbl intake manifold with a Carter (1695 ?) carb. The exhaust manifold has the word CHINA stamped into it so I am strongly assuming it is an aftermarket replacement. It has the large round counterweight on the exhaust manifold heat control valve. There are two bi-metallic springs on the control valve shaft behind the counterweight. I grabbed the counterweight and turned it (not too hard) and the end of one of the springs broke off! It appears the butterfly valve is welded to the shaft so I can only assume that was done after installation. That makes me think I cannot remove the shaft to make this repair. I cannot tell exactly where the broken end of the spring was previously connected before I broke it. Attachment: File comment: exhaust manifold with counterweight and spring location IMG_7450 thumbnail.JPG [ 57.36 KiB \| Viewed 971 times ] Attachment: File comment: close up of counterweight and spring location IMG_7453 thumbnail.JPG [ 39.95 KiB \| Viewed 971 times ] Attachment: File comment: closeup of spring IMG_7451 thumbnail.JPG [ 45.61 KiB \| Viewed 971 times ] Attachment: File comment: broken spring tip IMG_7455 thumbnail.JPG [ 40.96 KiB \| Viewed 971 times ]

Author:	halfafish [ Wed Oct 26, 2022 7:56 am ]
Post subject:	Re: Manifold Heat Control Valve, Spring Broken
Where are you located? I have several good exhaust manifolds in my parts stash, all of them are factory units. It might be easier to just replace the manifold.

Author:	Jase [ Wed Oct 26, 2022 5:52 pm ]
Post subject:	Re: Manifold Heat Control Valve, Spring Broken
You'e got nothing to loose by seeing if you can get the circular weight thing off. Maybe it is pressed on and getting it red hot with a rosebud would allow it to come off? I have no idea if it has been pressed on or welded on or what..

Author:	Odin1274 [ Mon Oct 31, 2022 8:34 am ]
Post subject:	Re: Manifold Heat Control Valve, Spring Broken
I am located in Fairfield, CA. It turns out to be the counterweight stop that broke. Do I have to remove the counterweight to replace the stop I ordered? I have not begun to reassemble the top end yet so I am open to replacing the intake or exhaust manifold if that is the best and most economical efficient approach.

Author:	Jase [ Tue Nov 01, 2022 7:52 am ]
Post subject:	Re: Manifold Heat Control Valve, Spring Broken
This thread suggests that it can be repaired with a new spring somehow.. deciding if you want to give it a try is up to you: https://www.slantsix.org/forum/viewtopic.php?t=60268

Author:	Odin1274 [ Thu Nov 03, 2022 12:11 pm ]
Post subject:	Re: Manifold Heat Control Valve, Spring Broken
Quote: This thread suggests that it can be repaired with a new spring somehow.. deciding if you want to give it a try is up to you: https://www.slantsix.org/forum/viewtopic.php?t=60268 My bi-metal spring is in tact whether or not it has the proper "tension." It is the counterweight stop that ended up breaking. I found a new one on eBay and i am waiting for it to arrive. I am asking if anyone knows of a way to replace the stop without removing the counterweight. I am trying not to buy a whole new manifold when this one (part 14310 ?) appears otherwise in great shape. I do not know the brand of it, but it has the O2 port mentioned above. Attachment: File comment: what appear to be the part number on the existing exhaust manifold IMG_7482 thumbnail.JPG [ 52.12 KiB \| Viewed 842 times ]

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