Club Cobra Gas-N Exhaust  

Go Back   Club Cobra > Manufacturers, Engine Builders, tools, and parts. > Antique & Collectibles

Welcome to Club Cobra!  The World's largest non biased Shelby Cobra related site!

  •  » Representation from nearly all Cobra/Daytona/GT40 manufacturers
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and nearly 1 million posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

MMG Superformance
Nevada Classics
MMG Superformance
Main Menu
Module Jump:
Nevada Classics
Nevada Classics
MMG Superformance
Keith Craft Racing
Advertise at CC
Banner Ad Rates
Keith Craft Racing
MMG Superformance
Keith Craft Racing
August 2022
S M T W T F S
  1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31      
  #1 (permalink)  
Old 04-30-2015, 05:20 PM
CC Member
Visit my Photo Gallery

 
Join Date: Sep 2007
Location: Marlboro, NJ
Cobra Make, Engine: Contemporary Cobra
Posts: 880
Not Ranked     
Default Exhaust leak Sidepipe Joint

I have a exhaust leak where the side pipe slides on the header, it is the lower to pipes and At idle I can feel the exhause leaking out. The side pipe receiver isn't perfectly round, I have tried to expand the header pipes but it is still leaking and popping when it decelerates. Do any of the RTV Silcones help seal the leak??
Jon
__________________
The Impossible Only Takes A Little Longer
Reply With Quote
Sponsored Links
Sponsored Links
  #2 (permalink)  
Old 04-30-2015, 07:08 PM
kevins2's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2011
Location: West Chester, PA
Cobra Make, Engine: ERA #795 427 S/C completed Jan. '14 - '68 FE 427 side oiler
Posts: 987
Not Ranked     
Default

Hi Jon,

I use this stuff: [ame="http://www.amazon.com/Walker-35959-Hardware-Sealing-Compound/dp/B000CQDL94"]Amazon.com: Walker 35959 Hardware Sealing Compound: Automotive@@AMEPARAM@@http://ecx.images-amazon.com/images/I/41W2dSVXfvL.@@AMEPARAM@@41W2dSVXfvL[/ame]

Made for exactly that purpose. This link is from Amazon but you can also get it at advanceauto stores. It's tar-like, so use disposable gloves. Cleans up with mineral spirits.

Kevin
__________________
"Anyone who drives faster than you is a maniac and anyone who drives slower than you is an idiot" - George Carlin
Reply With Quote
  #3 (permalink)  
Old 04-30-2015, 07:09 PM
DanEC's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Apr 2009
Location: Little Rock area, AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,330
Not Ranked     
Default

There is an exhaust and muffler sealer available. It used to be sold as a Walker product but the last tube I bought from NAPA was no longer labeled as a Walker product.

This stuff seals up well but it does set pretty hard and if there is any movement at the slip connection as the car is driven, it may eventually leak again - but probably not as much. It doesn't seem to hinder disassembly later - I just spray a little WD-40 in the connection and that seems to lubricate and soften it enough that the pipes will come apart without a big struggle.

Edit: Kevin beat me to the punch.
__________________
ERA 782 Running
https://www.youtube.com/watch?v=Cfge...b1-77fqwFRu7c]

Last edited by DanEC; 04-30-2015 at 07:12 PM..
Reply With Quote
  #4 (permalink)  
Old 05-27-2015, 10:29 AM
CC Member
Visit my Photo Gallery

 
Join Date: Sep 2007
Location: Marlboro, NJ
Cobra Make, Engine: Contemporary Cobra
Posts: 880
Not Ranked     
Default Tried it

Tried it and it didn't work....
Thnx for the idea
Jon
__________________
The Impossible Only Takes A Little Longer
Reply With Quote
  #5 (permalink)  
Old 05-27-2015, 10:36 AM
DanEC's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Apr 2009
Location: Little Rock area, AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,330
Not Ranked     
Default

Then you may have to expand both sides to get them round and a tight slip joint to fix it. You can try the red high temp RTV. it's used very often to seal headers to the head. Not sure how well it will work on a slip joint however. It will be more flexible after curing. As you have seen, it's a problem using sealant on a slip joint as the action of sliding one pipe inside the other scrapes it off. I would try applying sealer to both sides which will make a bit of a mess on the outside of the sidepipe receiver, but it can be cleaned up with Prep Sol or something similar. Applying to both sides should give better chances of getting enough in the joint to seal up.
__________________
ERA 782 Running
https://www.youtube.com/watch?v=Cfge...b1-77fqwFRu7c]

Last edited by DanEC; 05-27-2015 at 10:40 AM..
Reply With Quote
  #6 (permalink)  
Old 05-27-2015, 12:09 PM
CC Member
Visit my Photo Gallery

 
Join Date: Sep 2007
Location: Marlboro, NJ
Cobra Make, Engine: Contemporary Cobra
Posts: 880
Not Ranked     
Default New fix

Going to pull the header and side pipe take them to a myffler shop and have the header pipes expanped to fit the side pipes...
Jon
__________________
The Impossible Only Takes A Little Longer
Reply With Quote
  #7 (permalink)  
Old 05-27-2015, 03:42 PM
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2011
Location: Shelby, oh
Cobra Make, Engine: acc
Posts: 103
Not Ranked     
Default same problem

I battled with the same problem. Tried all kinds of sealants. Still leaked, so I made flanges, welded them to each side pipe and headers. Then made gaskets out of high temp. gaskets sheets. No more leaks, has 8 bolts on each side and looks very clean. I was a ton of work but well worth it.
Dave
Reply With Quote
  #8 (permalink)  
Old 05-30-2015, 11:31 AM
BAsque1's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2011
Location: Rockland County, NY
Cobra Make, Engine: West Coast Cobra/427
Posts: 852
Not Ranked     
Default

Quote:
Originally Posted by saltshaker View Post
I have a exhaust leak where the side pipe slides on the header, it is the lower to pipes and At idle I can feel the exhause leaking out. The side pipe receiver isn't perfectly round, I have tried to expand the header pipes but it is still leaking and popping when it decelerates. Do any of the RTV Silcones help seal the leak??
Jon
Jon:
I had the same problem and last year I bit the bullet and sent him my sidepipes which were a 2 piece collector and muffler, he welded them and refinished them with jet coat and are fabulous since. No black suit or leaks.
Great guy to deal with and most of all he is honest.
I hope this helps
Lou
__________________
Basque1
"Cobra--Because life is too short to drive a boring car"
Reply With Quote
  #9 (permalink)  
Old 05-30-2015, 01:06 PM
CC Member
Visit my Photo Gallery

 
Join Date: Sep 2007
Location: Marlboro, NJ
Cobra Make, Engine: Contemporary Cobra
Posts: 880
Not Ranked     
Default

Who did you send them to? They kook great!
Jon
__________________
The Impossible Only Takes A Little Longer
Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 08:40 PM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy
Links monetized by VigLink