Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 06-09-2020, 12:17 PM   #1
Reelnative
Junior Member
 
Reelnative's Avatar
 
Join Date: May 2020
Location: Melbourne, FL
Posts: 28
Default Exhaust Bracket

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.
Attached Images
File Type: jpg IMG_5524.jpg (29.1 KB, 155 views)
Reelnative is offline   Reply With Quote
Old 06-09-2020, 12:24 PM   #2
30 Closed Cab PU
Senior Member
 
Join Date: Aug 2018
Posts: 2,332
Default Re: Exhaust Bracket

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.
30 Closed Cab PU is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 06-09-2020, 01:20 PM   #3
The Master Cylinder
Senior Member
 
The Master Cylinder's Avatar
 
Join Date: Aug 2012
Posts: 875
Default Re: Exhaust Bracket

IMO, another item on the Model A that could have been designed better.
__________________
The Master Cylinder

Enjoying life at the beach in SoCal...
The Master Cylinder is offline   Reply With Quote
Old 06-09-2020, 09:16 PM   #4
Synchro909
Senior Member
 
Synchro909's Avatar
 
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,472
Default Re: Exhaust Bracket

Quote:
Originally Posted by The Master Cylinder View Post
IMO, another item on the Model A that could have been designed better.
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.
__________________
I'm part of the only ever generation with an analogue childhood and a digital adulthood.

Last edited by Synchro909; 06-16-2020 at 07:37 AM.
Synchro909 is offline   Reply With Quote
Old 06-09-2020, 09:48 PM   #5
Mulletwagon
Senior Member
 
Mulletwagon's Avatar
 
Join Date: Jan 2019
Location: Florida Panhandle
Posts: 585
Default Re: Exhaust Bracket

Common source for tailpipe rattles.
Mulletwagon is offline   Reply With Quote
Old 06-10-2020, 01:18 AM   #6
Ruth
Senior Member
 
Join Date: May 2016
Location: Glide, Oregon
Posts: 1,334
Default Re: Exhaust Bracket

Sponsored Links (Register now to hide all advertisements)
Quote:
Originally Posted by Synchro909 View Post
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.
Excellent! I'm going to try your method next time I have it apart. my clamp is rubber mounted now.
__________________
Ruth
"Sometimes you really DO need to read the whole thread"
Ruth is offline   Reply With Quote
Old 06-10-2020, 10:26 AM   #7
Bob C
Senior Member
 
Join Date: May 2010
Location: So Cal
Posts: 8,713
Default Re: Exhaust Bracket

Here's one the vendors sell.
https://modelastore.com/exhaust-syst...roduct_id=3435
Attached Images
File Type: jpg A5256E-600x800.jpg (28.8 KB, 13 views)
Bob C is offline   Reply With Quote
Old 06-10-2020, 10:06 PM   #8
Synchro909
Senior Member
 
Synchro909's Avatar
 
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,472
Default Re: Exhaust Bracket

Quote:
Originally Posted by Bob C View Post
I've had one of those too but the webbing didn't even last till I got home. My silicone idea lasted much longer but even that requires a touch up when I hear a rattle from the exhaust
__________________
I'm part of the only ever generation with an analogue childhood and a digital adulthood.
Synchro909 is offline   Reply With Quote
Old 06-11-2020, 08:56 AM   #9
Bob Bidonde
Senior Member
 
Bob Bidonde's Avatar
 
Join Date: May 2010
Location: Long Island, NY
Posts: 3,432
Default Re: Exhaust Bracket

The exhaust pipe clamp needs to have the properties shown in the picture.
Attached Images
File Type: jpg Exhaust Clamp Attributes 157kb.jpg (54.7 KB, 112 views)
__________________
Bob Bidonde
Bob Bidonde is online now   Reply With Quote
Old 06-11-2020, 08:59 AM   #10
jwilliams81
Senior Member
 
jwilliams81's Avatar
 
Join Date: Sep 2016
Location: Cincinnati OH
Posts: 418
Default Re: Exhaust Bracket

Quote:
Originally Posted by Bob Bidonde View Post
The exhaust pipe clamp needs to have the properties shown in the picture.
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
__________________
1931 Murray Town Sedan. Black body with Apple Green pin stripe.
1923 Model T Touring with electric start. Low radiator
Cincinnati, Ohio

Last edited by jwilliams81; 06-11-2020 at 02:21 PM.
jwilliams81 is offline   Reply With Quote
Old 06-13-2020, 07:49 PM   #11
Gufshoz
Member
 
Gufshoz's Avatar
 
Join Date: Feb 2012
Location: Gulf Shores, AL
Posts: 77
Default Re: Exhaust Bracket

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.
Gufshoz is offline   Reply With Quote
Old 06-15-2020, 11:51 PM   #12
SteveB31
Senior Member
 
SteveB31's Avatar
 
Join Date: May 2010
Location: Englewood, Colorado
Posts: 1,372
Default Re: Exhaust Bracket

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 is offline   Reply With Quote
Old 06-16-2020, 07:42 AM   #13
Synchro909
Senior Member
 
Synchro909's Avatar
 
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,472
Default Re: Exhaust Bracket

Quote:
Originally Posted by SteveB31 View Post
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.
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.
__________________
I'm part of the only ever generation with an analogue childhood and a digital adulthood.
Synchro909 is offline   Reply With Quote
Old 06-16-2020, 07:45 AM   #14
Bob Bidonde
Senior Member
 
Bob Bidonde's Avatar
 
Join Date: May 2010
Location: Long Island, NY
Posts: 3,432
Default Re: Exhaust Bracket

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
Bob Bidonde is online now   Reply With Quote
Old 06-16-2020, 08:49 AM   #15
Ruth
Senior Member
 
Join Date: May 2016
Location: Glide, Oregon
Posts: 1,334
Default Re: Exhaust Bracket

Quote:
Originally Posted by Bob Bidonde View Post
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.

Nice slides Bob. Very informative. Thanks for sharing.
__________________
Ruth
"Sometimes you really DO need to read the whole thread"
Ruth is offline   Reply With Quote
Old 06-16-2020, 09:17 AM   #16
jwilliams81
Senior Member
 
jwilliams81's Avatar
 
Join Date: Sep 2016
Location: Cincinnati OH
Posts: 418
Default Re: Exhaust Bracket

Quote:
Originally Posted by Bob Bidonde View Post
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,
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
__________________
1931 Murray Town Sedan. Black body with Apple Green pin stripe.
1923 Model T Touring with electric start. Low radiator
Cincinnati, Ohio
jwilliams81 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 09:18 AM.