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  #1  
Old 09-13-2021, 08:23 AM
ArVeeNiner's Avatar
ArVeeNiner ArVeeNiner is offline
 
Join Date: Jun 2006
Location: San Jose, CA
Posts: 1,146
Default Exhaust Leak At Slip Joint

I found an exhaust leak at the vertical slip joint of my Vetterman exhaust. As I recall, there are no seals in this area to replace, itís simply a slip joint. I donít recall seeing this before. Is this normal or is there a fix?
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Kelly Johnson
San Jose, CA
RV-9A

Pink slip issued: 5/7/12

First flight: 5/28/12, Memorial Day.

Phase I Complete: 8/18/12!
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  #2  
Old 09-13-2021, 10:32 AM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 1,536
Default

Take that picture down to the local muffler shop, they may have a tube stretcher that could snub that up.
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  #3  
Old 09-13-2021, 11:19 AM
fixnflyguy fixnflyguy is offline
 
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Location: Winston-Salem, N.C.
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Default Pretty normal

Looks pretty normal to me. There will always be some leakage, a lttle which will close up with build-up. Mine are similar.
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  #4  
Old 09-14-2021, 12:01 AM
NDstroh NDstroh is offline
 
Join Date: May 2019
Location: 16X
Posts: 4
Default

You might want to get a hold of Vetterman. I cannot tell by picture, but they have eliminated slip joint on some of their installs due to some cracking issues. I'm sure he could tell you whether the leaks you show here are cause for concern...
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  #5  
Old 09-14-2021, 05:46 AM
Tim Lewis Tim Lewis is offline
 
Join Date: Aug 2006
Location: Bristow, VA
Posts: 165
Default

I believe there's supposed to be a bolt/nut holding the slip joint components together. In this picture, the bolt appears to be almost completely corroded away.
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  #6  
Old 09-14-2021, 06:11 AM
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Walt Walt is online now
 
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Default

Quote:
Originally Posted by Tim Lewis View Post
I believe there's supposed to be a bolt/nut holding the slip joint components together. In this picture, the bolt appears to be almost completely corroded away.
Some units just had pins that rotated into the mating block, that is what this looks like.
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  #7  
Old 09-14-2021, 08:11 AM
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ArVeeNiner ArVeeNiner is offline
 
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Location: San Jose, CA
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Default

Quote:
Originally Posted by Walt View Post
Some units just had pins that rotated into the mating block, that is what this looks like.
Yep, that is correct.

So far the majority of the responses from this forum and my EAA group says it's normal but I will certainly keep an eye on it.

Thanks much!
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Kelly Johnson
San Jose, CA
RV-9A

Pink slip issued: 5/7/12

First flight: 5/28/12, Memorial Day.

Phase I Complete: 8/18/12!
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  #8  
Old 09-14-2021, 11:06 AM
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schristo@mac.com schristo@mac.com is offline
 
Join Date: Sep 2007
Location: WA
Posts: 995
Default Anti-seize lubricant

I use a nickel-based anti-seize lubricant at the slip joints… It will help seal.

Permatex 77124 Nickel Anti-Seize Lubricant, 8 oz
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  #9  
Old 09-14-2021, 01:29 PM
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RV6_flyer RV6_flyer is offline
 
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Location: NC25
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For past 24-years, mine have been dry. But as Stephen said, there are products available that could help seal.

I have this sitting in my hangar (I inherited it from my father) that is rated to 1,800 F. Something like this may be helpful.

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  #10  
Old 09-14-2021, 03:16 PM
qtrmiledan qtrmiledan is offline
 
Join Date: Jan 2005
Location: Baton Rouge,La.
Posts: 157
Default

Kelly- do you have mufflers? If so check to ensure the cone is not collapsed and restricting exhaust flow. I have mufflers, my slip joints donít show that leakage- 500hrs.
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