Exhaust Bracket

Reelnative

Reelnative

Member
I was crawling around under my car today (just picked it up.) I noticed the rear exhaust bracket was solid mounted, seems like there should be a more flexible mount instead of clamped to the frame. I looked through some parts catalogs and didn't see any so maybe this the way it's supposed to be.
 

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The clamp is not supposed to be tightened down on the pipe completely. It should allow the pipe to slide so there is room for movement of the pipe.
 
The Master Cylinder said:
IMO, another item on the Model A that could have been designed better.
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I agree with that!. My solution is to put a spacer in the clamp so it doesn't hold the pipe tightly. I like to leave about a couple of mm clearance around the pipe. I wrap some paper or anything similar around the pipe and tighten the clamp. I hold the pipe central in the clamp with splinters of wood, then fill the gap with silicone. Once it sets, I drive and the heat destroys the paper. The pipe is free to move back and forth and there are no noises.
 
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Synchro909 said:
I agree with that!. My solution is to put a spacer in the clamp so it doesn't hold the pipe tightly. I like to leave about a couple of mm clearance around the pipe. I wrap some paler or anything similar around the pipe and tighten the clamp. I hold the pipe central in the clamp with splinters of wood, then fill the gap with silicone. ONce it sets, I drive and the heat destroys the paper. The pipe is free to move back and forth and there are no noises.
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Excellent! I'm going to try your method next time I have it apart. my clamp is rubber mounted now.
 
The exhaust pipe clamp needs to have the properties shown in the picture.
 

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Bob Bidonde said:
The exhaust pipe clamp needs to have the properties shown in the picture.
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Bob,
Nice illustration.
Just curious, did you make this illustration or take it from another site?
I have seen some of your other posts with the illustrations and really like them.

Thanks,
Jarrod
 
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I drilled a hole through an old tire sidewall and placed it on the upper side of the clamp. I was concerned about a rigid clamp and using float-a-motor causing too much stress on the exhaust manifold. Maybe I’m overthinking, but it made sense to me.
 
Keep in mind that every time you drive your car that tailpipe move about 3/4”. Therefore it must be able to slide in the clamp. Years ago a fellow told me his and I did not believe him, so I scribed a line on both side of the clamp on the tailpipe with a hacksaw. Drove the car a few miles, came home and left it running. Sure enough my lines scribed in the tailpipe had moved back almost an inch. If the clamp is tight, it forces the tailpipe and muffler to bend at the 90 degree bend under the manifold, causing it to leak.
 
SteveB31 said:
Keep in mind that every time you drive your car that tailpipe move about 3/4”. Therefore it must be able to slide in the clamp. Years ago a fellow told me his and I did not believe him, so I scribed a line on both side of the clamp on the tailpipe with a hacksaw. Drove the car a few miles, came home and left it running. Sure enough my lines scribed in the tailpipe had moved back almost an inch. If the clamp is tight, it forces the tailpipe and muffler to bend at the 90 degree bend under the manifold, causing it to leak.
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That's not the only thing it does. The exhaust manifolds on a Model A are known to sag at the back. The most commonly given reason for that is the weight of the exhaust hanging on the hot manifold. If the exhaust pipe is held rigidly at the back, the expansion pushes the outlet end of the manifold forward which also causes forces wanting to bend it. I believe that a sagging manifold is caused by a combination of these two things.
 
jwilliams,
I make the slides posted here and there for presentations to my Model "A" club, the Model "A" Ford Club of Long Island. I give a different presentation at each monthly club meeting that typically consists of 20 to 30 slides on a topic. I cherry pick those presentations when they answer a question on the Ford Barn.
 
Bob Bidonde said:
jwilliams,
I make the slides posted here and there for presentations to my Model "A" club, the Model "A" Ford Club of Long Island. I give a different presentation at each monthly club meeting that typically consists of 20 to 30 slides on a topic. I cherry pick those presentations when they answer a question on the Ford Barn.
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Nice slides Bob. Very informative. Thanks for sharing.
 
Bob Bidonde said:
jwilliams,
I make the slides posted here and there for presentations to my Model "A" club, the Model "A" Ford Club of Long Island. I give a different presentation at each monthly club meeting that typically consists of 20 to 30 slides on a topic. I cherry pick those presentations when they answer a question on the Ford Barn.
Click to expand...

Bob,
Your club is very lucky to have you! I bet those are great informative presentations. I would love to be able to use them in our club's newsletter, giving you credit of course! Is that something you are or would be willing to share to the group?

Thanks,
Jarrod
 
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