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12-31-2019, 03:08 PM
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Join Date: Apr 2012
Location: Tampa (Wimauma actually)
Posts: 421
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Leaking Fuel Tank Rivet
Okay, so I've tried all the tricks to get this rivet to quit leaking. No amount of pressurized cattle syringe injection of any type of sealant has worked. They slowed the leak quite a bit but have not stopped it completely. So, I'm ready to take the plunge, drill this sucker out and replace it with a new, sealant coated rivet so I can get the leak stopped and the paint back in order!
The plans call for a AN470AD4-4 rivet. Obviously, I'll need a blind countersunk rivet for the replacement. To save me having to learn all about Cherry Max rivets again, would one of you rivet wizards tell me what I should use here please?
Thanks,
Randy

__________________
Randy King
Tampa (Wimauma), Florida
RV-4 N212CS (sold)
RV-8 N184RK (flying)
Flying an A320 to pay the bills
Exempt and gladly donating anyway - Current through March 2021
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12-31-2019, 03:51 PM
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Join Date: Jul 2016
Location: Florida
Posts: 56
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Your looking at the wrong drawing for the rivet that is leaking.
The one in the picture is probably an an3-3.5 I don?t think you will find a pop rivet that will work in this size and location. Your best bet will be to remove the tank and open up the rear baffle to access the rivet so it can be replaced and resealed.
Do a search for tank leak repair and you will find many threads on this problem.
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12-31-2019, 03:57 PM
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Join Date: Apr 2012
Location: Tampa (Wimauma actually)
Posts: 421
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Quote:
Originally Posted by Rv3Dave
Your looking at the wrong drawing for the rivet that is leaking.
The one in the picture is probably an an3-3.5 I don?t think you will find a pop rivet that will work in this size and location. Your best bet will be to remove the tank and open up the rear baffle to access the rivet so it can be replaced and resealed.
Do a search for tank leak repair and you will find many threads on this problem.
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Thanks Dave! But, I'll let it leak at the rate it is leaking FOREVER before I pull the tank and open it up to fix that one problem.
I sure can't figure out what drawing I should be looking at if not that one. That's why I need one of you builder wizards to help me out!
__________________
Randy King
Tampa (Wimauma), Florida
RV-4 N212CS (sold)
RV-8 N184RK (flying)
Flying an A320 to pay the bills
Exempt and gladly donating anyway - Current through March 2021
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12-31-2019, 04:41 PM
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Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,218
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Back in the old days, one of the factory guys suggested using one of the 1/8" sealed end pop rivets you use to attach the aft baffle to the ribs. You drill the offending hole out to 1/8", countersink it a bit if it is dimpled, then put a dab of proseal on the rivet and install. You come back once the proseal is cured and file or sand the rivet to some acceptable level of flushness.
After that, you fill and paint...
__________________
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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12-31-2019, 05:52 PM
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Join Date: Dec 2017
Location: Lithia, FL
Posts: 217
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Old rivet
Watch for the shop head of the current rivet when it is drilled out. FOD in the fuel tank is never a good thing.
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12-31-2019, 06:21 PM
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Join Date: Oct 2007
Location: Sacramento, CA
Posts: 3,351
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Why not trying the green Loctite method to see if that will fix it before opening the back>
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Mehrdad
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - Flying
Dues paid
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12-31-2019, 09:15 PM
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Join Date: Jan 2005
Location: Cincinnati, OH
Posts: 1,558
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What Kyle said.... should work fine and be a relatively simple install. Make sure you clean the area perfectly to assure the proseal sticks and let it cure for a few days. Then all you have to worry about is the cosmetics - no problem. If you need a couple of those sealed end pop rivets, let me know, I?ll send you a couple.
__________________
SH
RV6/2001 built/sold 2005
RV8 Fastback/2008 built/sold 2015
RV4/bought 2016/sold/2017
RV8/2018 built/Sold(sadly)
RV4/bought 2019 Flying
Cincinnati, OH/KHAO
JAN2020
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12-31-2019, 09:36 PM
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Join Date: May 2013
Location: Sherman, CT
Posts: 794
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What about using an MK319-BS rivet?
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Jake
RV6 #20477 completed 1991 sold.
RV7 #72018 N767T first flight 11/21/2017 350+ hrs.
IO-360M1B MT 3 blade, Dual AFS 5600 QUICK Panel.
Manual Flaps. (KOXC)Oxford, CT, (0NY0)North Creek, NY.
1941 J3 Cub skis,floats.
2020 dues gladly paid.
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12-31-2019, 09:43 PM
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Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,218
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Quote:
Originally Posted by Jpm757
What about using an MK319-BS rivet?
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Might work, might not. Those aren't sealed end rivets, so you'd have to get proseal down into the rivet (into the area where the mandrel is) and hope it holds.
__________________
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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01-01-2020, 08:00 AM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,189
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maybe
Maybe an AK-42H...countersunk, closed end, blind rivet...
__________________
Bob
Aerospace Engineer '88
RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
EFII System 32 - Done
297 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...
Dues+ Paid 2019,...Thanks DR+
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