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  #1  
Old 05-29-2019, 02:37 PM
mulde35d's Avatar
mulde35d mulde35d is offline
 
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Location: Clarksville, TN
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Default Fuel Tank Follies

Since I am about 24 hours from closing up my right and left fuel tank with the Tank Baffle, I figure I would poll the group to see if their is anything you wish you had done before sealing it up. Your past follies may help me and everyone else coming to this point prevent the fun of re-doing a fuel tank seal.

While I am asking, I was curious just how one would replace / seal a leaking solid rivet once the tank is all sealed up. Seems it would be exceptionally hard to reach on the back side through the fuel cap and disassembling the tank baffle would be exceptionally labor intensive.

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  #2  
Old 05-29-2019, 02:42 PM
Bavafa Bavafa is offline
 
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Location: Sacramento, CA
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Default

How come no proseal on those nut plates rivets?
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  #3  
Old 05-29-2019, 02:47 PM
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mulde35d mulde35d is offline
 
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Default Sealant

Quote:
Originally Posted by Bavafa View Post
How come no proseal on those nut plates rivets?
Not required per the instructions (page 18-4, Figure 3). It is sealed on the outside when the fuel level sender is installed.
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  #4  
Old 05-29-2019, 04:56 PM
salto salto is offline
 
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Default

I pressure tested prior to permanently securing the rear baffle.
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  #5  
Old 05-29-2019, 05:03 PM
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mulde35d mulde35d is offline
 
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Default How

Quote:
Originally Posted by salto View Post
I pressure tested prior to permanently securing the rear baffle.
I have to ask, how did you manage to pressure test it before securing the tank baffle? I would think you would at least have needed to install the blind rivets to get a seal.
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  #6  
Old 05-29-2019, 05:35 PM
dtw_rv6 dtw_rv6 is offline
 
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I would proseal the rear baffle in place and test without rivets if I had to. It’s no fun to find and fix after the plane is assembled.
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  #7  
Old 05-29-2019, 06:53 PM
rmaugans rmaugans is offline
 
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I'm assuming you have dry fit/aligned the fuel sender floats. This was a bear on our QB tanks - peering into the tiny fuel line hole(s) and following the misleading float wire bending dimensions on the dwgs.
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  #8  
Old 05-29-2019, 07:33 PM
Bavafa Bavafa is offline
 
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Quote:
Originally Posted by rmaugans View Post
I'm assuming you have dry fit/aligned the fuel sender floats. This was a bear on our QB tanks - peering into the tiny fuel line hole(s) and following the misleading float wire bending dimensions on the dwgs.
Good point to do it at this point and certainly more accurate but there are other ways that is not as painful when it is closed.
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  #9  
Old 05-30-2019, 01:56 AM
gen1313 gen1313 is offline
 
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Default

Quote:
Originally Posted by mulde35d View Post
Since I am about 24 hours from closing up my right and left fuel tank with the Tank Baffle, I figure I would poll the group to see if their is anything you wish you had done before sealing it up. Your past follies may help me and everyone else coming to this point prevent the fun of re-doing a fuel tank seal.

While I am asking, I was curious just how one would replace / seal a leaking solid rivet once the tank is all sealed up. Seems it would be exceptionally hard to reach on the back side through the fuel cap and disassembling the tank baffle would be exceptionally labor intensive.

From memory I had only one leaking rivet on one of the fuel drains. I used Loctite "Wicking" thread locker (can't remember the number). I was greatly relieved when it worked and still no problem 21/2 years later.
There are plenty of threads on VAF about tank leaks.
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  #10  
Old 05-30-2019, 06:36 AM
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mulde35d mulde35d is offline
 
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Default Almost there

Fuel level sender lines are bent and installed, fuel drain hooked up / sealed / torqued. Left wing is pictured below.

I can't imagine trying to bend the fuel level sender in a quickbuild with the rear tank baffle installed.

I am going to wait till this evening to attach the tank baffle in case any amazing ideas pop up on the thread. Otherwise I will clean the interior real well with denatured alcohol and seal it up.

Interestingly, I haven't even used 1 full quart of tank sealant. The rear baffle will probably force me to break into the second can, but just slightly. Should leave plenty available for other tasks later on in the build.

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Last edited by mulde35d : 05-30-2019 at 06:52 AM.
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