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  #21  
Old 09-05-2012, 09:19 PM
roadrunner20's Avatar
roadrunner20 roadrunner20 is offline
 
Join Date: Feb 2005
Location: Bay Pines, FL (based @ KCLW)
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Default Rivet weeping cured by push method.

Quote:
Originally Posted by DanLandry View Post
I developed the same problem yesterday on a rivet close to the leading edge.

Once I get the fuel level below the rivet, instead of the vacuum, I was thinking of fabricating a syringe with a gasket & push the green loctite into the rivet area.

BTW, My plane's been flying 6 years and this developed yesterday.
Strange how these things crop up out of nowhere.

I'll provide an update when available.
This is an update on my original post.
Seven days into my fix of a weeping rivet, problem solved...

As stated above, I used a a syringe with a 1/2 diameter barrel. I cut & removed the needle mount to expose the 1/2" opening. I made sure the cut was clean & symetrical to allow a perfect seal when placing over the skin & weeping rivet. I used Pliobond as it has a slow cure and is chemical & gas resistant.

To begin the process the fuel level must be below the weeping rivet.
1. Remove the fuel cap.(this will allow a pressure variant)
2. Load a small amount of pliobond into the syringe.
3. Place the opening cut end over the weeping rivet and make sure you have a solid seal against the skin.
4. Depress the syringe. You should feel resistance if you have a solid seal against the skin & providing the push.
5. Repeat step #4 to insure enough pliobond consumes rivet.
6. Let cure for 48 hours to ensure proper seal.

Others have suggested green loctite, which may be a better product. But, I happen to have pliobond that I had previously used & was recommened by Lycoming for crankseal sealing.

Hope this works for your situation. It's a low cost alternative to what others have suggested. Now I just have to come up with a way to remove the blue fuel stain.
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Danny "RoadRunner" Landry
Morphed RV7(formally 7A), N20DL, PnP Pilot
1190+ hours
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Last edited by roadrunner20 : 09-05-2012 at 09:26 PM.
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  #22  
Old 09-06-2012, 06:06 AM
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s10sakota s10sakota is offline
 
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Location: Westland, MI
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Default

Since I am just beginning the construction of my fuel tanks, what is the best way to prevent this from happening in the future? Maybe sometimes this can not be prevented, but I'd sure like to do what ever it takes now so that I never get a weeping rivet!

Any advice to a builder that's just starting the tanks?
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1962 Piper Cherokee 160
2003 RANS S-10
2011 RANS S-6S
2011 Vans RV-7
2015 Zenith Cruzer
1962 Mooney M20C
2019 KITFOX Super Sport
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  #23  
Old 09-06-2012, 06:43 AM
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Default

Quote:
Originally Posted by s10sakota View Post
Since I am just beginning the construction of my fuel tanks, what is the best way to prevent this from happening in the future? Maybe sometimes this can not be prevented, but I'd sure like to do what ever it takes now so that I never get a weeping rivet!
Any advice to a builder that's just starting the tanks?
Read the 100 or so pages in the archives?
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  #24  
Old 09-06-2012, 07:58 AM
g zero g zero is offline
 
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Location: palm coast fl.
Posts: 945
Default Leaking rivets

Are the leaking ,seeping rivets located in random areas or more leaks in one area such as the back bulkhead ? I saw Dan H put some access panels on the rear bulkhead to allow proper sealing . How have your tanks held Dan ? What diam. are the access holes ? I am working on my slow build wings and trying to gather as much info before I start on the fuel tanks.
Thanks , Tom
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  #25  
Old 09-07-2012, 04:59 PM
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roadrunner20 roadrunner20 is offline
 
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Default

Quote:
Originally Posted by s10sakota View Post
Since I am just beginning the construction of my fuel tanks, what is the best way to prevent this from happening in the future? Maybe sometimes this can not be prevented, but I'd sure like to do what ever it takes now so that I never get a weeping rivet!

Any advice to a builder that's just starting the tanks?
I guess, It just happens.
Mine did after 6 years flying.
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Morphed RV7(formally 7A), N20DL, PnP Pilot
1190+ hours
2019 Donation Paid
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  #26  
Old 11-26-2012, 05:16 PM
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Location: Utah
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Default

Removing left tank to fix this







Couple rivets on top are "breathing" and I want to fix them properly. Thank you Rick for great illustration of the problem. Invasive surgery will be performed via rear baffle. Boy what a pain to remove the tank with pushrod on the way.
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  #27  
Old 11-26-2012, 05:25 PM
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RV10Rob RV10Rob is offline
 
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Location: Woodinville, WA
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Quote:
Originally Posted by s10sakota View Post
Any advice to a builder that's just starting the tanks?
Mine just started leaking at 160 hours and 1.5 years, near the root. I've heard recently that you shouldn't stand on the wing forward of the spar. Probably good advice. As a result, my paint shop didn't install the nonskid forward of the spar.

-Rob
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  #28  
Old 11-26-2012, 08:47 PM
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Av8torTom Av8torTom is offline
 
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Location: Yardley, PA
Posts: 1,334
Default

Quote:
Originally Posted by Vlad View Post

Couple rivets on top are "breathing" and I want to fix them properly. Thank you Rick for great illustration of the problem. Invasive surgery will be performed via rear baffle. Boy what a pain to remove the tank with pushrod on the way.
Vlad, why not try the green loctite with a small vacuum in the tank first? If that doesn't work you can always remove it later if that doesn't work.
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  #29  
Old 11-26-2012, 09:18 PM
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Vlad Vlad is offline
 
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Quote:
Originally Posted by Av8torTom View Post
Vlad, why not try the green loctite with a small vacuum in the tank first? If that doesn't work you can always remove it later if that doesn't work.

I want to fix it right way and with a guarantee Tom. Tank is already off.
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  #30  
Old 11-27-2012, 11:12 AM
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Av8torTom Av8torTom is offline
 
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Default Start here

Quote:
Originally Posted by s10sakota View Post
Since I am just beginning the construction of my fuel tanks, what is the best way to prevent this from happening in the future? Maybe sometimes this can not be prevented, but I'd sure like to do what ever it takes now so that I never get a weeping rivet!

Any advice to a builder that's just starting the tanks?
Mark, start with this thread. Best info and advice on this in my opinion
http://www.vansairforce.com/communit...ead.php?t=7602
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RV-9A (empennage completed, both wings completed, fuselage and finish kit completed, engine hung, working on panel and wiring)
N677AT reserved
Superior XP O-320, 160HP
Picture log: http://s271.photobucket.com/albums/j...8tor215/RV-9A/
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