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Old 06-27-2020, 02:09 PM   #1
Curtis in MA
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Default Manifold/Muffler Joint

Should the connection be solid or have some movement?
Mine moves about a half inch at the bottom and I have tightened the bolts all I can.
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Old 06-27-2020, 02:37 PM   #2
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Default Re: Manifold/Muffler Joint

You need to tighten that up.
Get new clamps/bolts if needed, are you using a sleeve, is the tail pipe flange seating on the manifold correctly?
If it's loose...it's leaking
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Old 06-27-2020, 02:56 PM   #3
Bob C
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Default Re: Manifold/Muffler Joint

Do you have the clamp on the right way, there is a top and bottom.
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Old 06-27-2020, 03:33 PM   #4
Patrick L.
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Default Re: Manifold/Muffler Joint

Like the fellas said, they're correct.

I cut a gasket from asbestos, well, I guess that stuff is illegal, so I cut up a welding glove. [ it feels, smells, looks and tastes like asbestos]
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Old 06-27-2020, 04:12 PM   #5
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Default Re: Manifold/Muffler Joint

I had that same problem. I filed both clamp halves where they meet just a hair and now I have a tight leak free joint.
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Old 06-27-2020, 05:08 PM   #6
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Default Re: Manifold/Muffler Joint

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Are you using a repro clamp?
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Old 06-27-2020, 05:28 PM   #7
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Default Re: Manifold/Muffler Joint

N'Abend Curtis,
I use exhaust sealing putty together with the cup ring. If the contact pressure is too low, you must use washers.
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Old 06-27-2020, 05:50 PM   #8
Curtis in MA
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Default Re: Manifold/Muffler Joint

I don't know what is in there. It was put on sometime ago by my father. I just noticed it was loose.
I'll try to take it apart.
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Old 06-27-2020, 06:00 PM   #9
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Default Re: Manifold/Muffler Joint

Quote:
Originally Posted by Patrick L. View Post
Like the fellas said, they're correct.

I cut a gasket from asbestos, well, I guess that stuff is illegal, so I cut up a welding glove. [ it feels, smells, looks and tastes like asbestos]
Mikeís has them, they are under $2.00. Looks like asbestos but isnít.

Have used on a couple of Model Aís.

Enjoy.
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Old 06-27-2020, 06:37 PM   #10
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Default Re: Manifold/Muffler Joint

I like the new "no-nut" clamp. Easier to install. Not authentic tho.
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Old 06-27-2020, 06:37 PM   #11
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Default Re: Manifold/Muffler Joint

I can't imagine that things are any different in the US from here but I use a muffler putty in there to get a good seal, as has been suggested above. It sets hard and to remove it, I use a wire brush in the drill.
BTW, the exhaust clamp is a #$%^ to install on a RHD car. It has to be just right or the clutch pedal won't go down past it. I put a helicoil in one side and use a shorter bolt which means there is no nut for the clutch pedal to hang up on.
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Old 06-27-2020, 09:54 PM   #12
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Default Re: Manifold/Muffler Joint

This may be unorthodox but has worked fine for me for many years... wrap a 3/4 " wide band of 4 or 5 folded layers of aluminum foil around the joint. install the clamp over this band and tighten. Of course first ensure a good fit of the pipe flange to the manifold. Never had leaks and the foil stays put and is invisible.
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Old 06-27-2020, 11:07 PM   #13
verdirick
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Smile Re: Manifold/Muffler Joint

My suggestion... Buy an Aires muffler. It will have the correct flange that will fit your manifold. AS far as I know it is the only one on the market that is an exact duplicate of the original Ford blueprint.. I've installed one on two A's, Fit and sound are worth the price
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Old 06-29-2020, 09:36 AM   #14
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Default Re: Manifold/Muffler Joint

The design of the manifold to muffler assembly joint allows for some movement, but not much. It is a semi-ball type joint. The muffler assembly develops a lever bending action on the joint, so it needs to be somewhat flexible and allow some rotational movement of the muffler assembly to dissipate the lever action.
Unfortunately, the design lacks a seal, so we have a habit of over tightening the joint. When the joint prohibits movement, the lever action causes the manifold to bend downward and eventually crack between cylinders 3 & 4.
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Old 06-29-2020, 10:01 AM   #15
Ray in La Mesa
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Default Re: Manifold/Muffler Joint

Per JoeCB & verdirick, I run an Aries muffler, orange RTV on the joint & wrap it with tinfoil and it works great.
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Old 06-29-2020, 09:39 PM   #16
Jerry in Shasta
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Default Re: Manifold/Muffler Joint

I took mine to a muffler shop and had the flange bent to a true 45 degress and bend from the flange to the muffler bent to a true 90 degress. Works great with no gasket.
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Old 06-29-2020, 10:59 PM   #17
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Default Re: Manifold/Muffler Joint

Quote:
Originally Posted by JoeCB View Post
This may be unorthodox but has worked fine for me for many years... wrap a 3/4 " wide band of 4 or 5 folded layers of aluminum foil around the joint. install the clamp over this band and tighten. Of course first ensure a good fit of the pipe flange to the manifold. Never had leaks and the foil stays put and is invisible.
Joe B
Ditto on that
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Old 06-29-2020, 11:01 PM   #18
vern hodgson
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Default Re: Manifold/Muffler Joint

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Ditto on that
Position a floor jack under the pipe bend to hold it in position.
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Old 06-30-2020, 12:10 PM   #19
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Default Re: Manifold/Muffler Joint

Also, besides the jack support, the flange on the exhaust pipe may need some altering with a ball peen hammer, and the end of the manifold filed.
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