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10-09-2015, 08:00 PM
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Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 2,791
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Quote:
Originally Posted by Av8torTom
Good to know Steve... thanks. Pictures?
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well, not much to see but here is the offending rivet. it's been several days with a full tank (to the brim) and no weeping as was before. who knows how long it will last but I'm going to paint it and take my chances right after I finish sanding these freek'in wheel pants.

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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all
Simplicity is the art in design.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
Last edited by Steve Melton : 10-09-2015 at 08:11 PM.
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10-09-2015, 08:44 PM
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Join Date: Feb 2005
Location: Bay Pines, FL (based @ KCLW)
Posts: 1,955
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I posted my syringe process a few years ago on a weeper I had on the bottom of my tank. I used pliobond with a modified syringe with a rubber bushing to seal around the rivet. Make sure you leave the fuel cap off to allow the pressure to inject & seal around the offender. It's been more than 2 years without any weeping.
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Danny "RoadRunner" Landry
Morphed RV7(formally 7A), N20DL, PnP Pilot
1190+ hours
2019 Donation Paid
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10-09-2015, 08:56 PM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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Quote:
Originally Posted by roadrunner20
I posted my syringe process a few years ago on a weeper I had on the bottom of my tank. I used pliobond with a modified syringe with a rubber bushing to seal around the rivet. Make sure you leave the fuel cap off to allow the pressure to inject & seal around the offender. It's been more than 2 years without any weeping.
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The vent should cover that..
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VAF #897 Warren Moretti
2019 =VAF= Dues PAID
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10-09-2015, 09:00 PM
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Join Date: Feb 2005
Location: Bay Pines, FL (based @ KCLW)
Posts: 1,955
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Quote:
Originally Posted by gasman
The vent should cover that..
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That's true. Either way, it worked.
__________________
Danny "RoadRunner" Landry
Morphed RV7(formally 7A), N20DL, PnP Pilot
1190+ hours
2019 Donation Paid
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08-24-2016, 02:32 PM
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Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 2,791
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about one year later. weeping rivet is still sealed. August 2016. no need to pull a vacuum on the tank with this method.
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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all
Simplicity is the art in design.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
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07-30-2017, 06:03 PM
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Join Date: Feb 2005
Location: Bay Pines, FL (based @ KCLW)
Posts: 1,955
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Almost 4 years now still not leaking.
__________________
Danny "RoadRunner" Landry
Morphed RV7(formally 7A), N20DL, PnP Pilot
1190+ hours
2019 Donation Paid
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10-06-2017, 06:34 AM
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Join Date: Mar 2005
Posts: 115
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Just to add to the data on this technique, I developed a weeping rivet near the leading edge of one of my tanks that was very successfully dealt with using the syringe technique.
This happened after flying my 900h, 13y old RV8 through some pretty heavy rain. Some paint must have peeled back from the top of a rivet, exposing a leak which made itself apparent the next time I went flying (big blue halo around it etc). While bracing for having to remove the tank and cut a hole to fix from the inside I decided to try this technique as there appears to be no downside.
I did not thin the proseal at all, but I did use a 5cc syringe instead of a 10cc syringe (you can exert more pressure at the tip as the plunger is about half the surface area of a 10cc syringe).
Its been 6 weeks and another 20h of flying (at least) and the repair has held up nicely.
Jon Weiswasser
N898JW
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10-06-2017, 03:21 PM
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Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 2,791
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Quote:
Originally Posted by jonweisw
Just to add to the data on this technique, I developed a weeping rivet near the leading edge of one of my tanks that was very successfully dealt with using the syringe technique.
This happened after flying my 900h, 13y old RV8 through some pretty heavy rain. Some paint must have peeled back from the top of a rivet, exposing a leak which made itself apparent the next time I went flying (big blue halo around it etc). While bracing for having to remove the tank and cut a hole to fix from the inside I decided to try this technique as there appears to be no downside.
I did not thin the proseal at all, but I did use a 5cc syringe instead of a 10cc syringe (you can exert more pressure at the tip as the plunger is about half the surface area of a 10cc syringe).
Its been 6 weeks and another 20h of flying (at least) and the repair has held up nicely.
Jon Weiswasser
N898JW
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that's good news. you may have reached close to 200 psi pressure at the tip. did you have much squirt out at the tip with the non thinned proseal?
and BTW, my repair with this method is still holding fine after a couple of years and 200 hrs.
__________________
Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all
Simplicity is the art in design.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
Last edited by Steve Melton : 10-06-2017 at 03:32 PM.
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10-07-2017, 06:35 AM
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Join Date: Mar 2005
Posts: 115
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Steve -
Very little mess at all. Your technique worked perfectly.
Glad to hear its holding up.
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10-07-2017, 07:35 AM
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Join Date: Jul 2017
Posts: 344
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Years ago I had an Aerostar. They are known for fuel leaks. I used to carry something called a "click patch" with me (I think that is what they are called). Had to use these patches a few times and each time they worked as advertised. Very simple and inexpensive. I cannot remember where i got them or who gave them to me.
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