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  #31  
Old 05-13-2018, 05:00 PM
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agirard7a agirard7a is online now
 
Join Date: Aug 2009
Location: Newport, RI
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Default Testing tank

I also did a pressure test and squirted soapy water and found no leaks until they where mounted on my plane and full of fuel. My recommendation in testing the tank is to put a 1/2- 1 gallon of fuel in them and lay them on the floor rear baffle side down. If they are going to leak, it will be a high percentage chance coming from the rear baffle area. If you see stains on the floor you will know. Also, I used the thinner viscosity proseal to repair leaks. It will flow better into small areas.
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  #32  
Old 06-02-2018, 10:03 PM
didja didja is offline
 
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Location: Goodyear, Az
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So, I decided to go ahead and try to do one myself and see how it goes! I'm just about to start pro sealing. I've got everything prepped and deburred and in place to be ready to be put in when I need them, trying to minimize the time of assembly before the pro seal dries up!

I'll post pics of the final product. Thanks for all the input!
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RV-14a Kit# 140432
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  #33  
Old 08-21-2018, 12:05 AM
didja didja is offline
 
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So, I have constructed my left tank to the point where I just finished my second attempt at the water test before placing the back baffle in place. My first attempt saw two holes that I had not gooped enough pro-seal over on the inner rib. I drained the tank and commenced to gooping all that I could.

A day and a half after applying the pro-seal, I tried my second attempt. I now have a small leak from one of the same join locations but instead of a steady stream, it is not only about 60 drops a minute, so I will apply more goop and that should fix that.

The other issue that I had, was the gas cap. I had a pretty solid stream coming from the seal of the gas cap. I drained the water back down below the cap level and replaced the gas cap with the cap that would have gone onto my right fuel tank. I now seem to have a *very* slight leak where after about a minute or two, a small dew drop size water drop forms at the fuel cap, but doesn't run immediately.

Has anyone had experience with the rv-14 supplied gas caps from van's being an issue in sealing? Also, being as this would only leak if I stayed inverted for a very long time, is this of concern? I'm assuming that I want zero leaks as I am not sure that it would pass the pressure test or not (depending on if the pressure test actually forced the gas cap seal to close up and therefore hold pressure)Ö.. I just am not sure if there is an acceptable amount of leakage from the gas cap or not.

I will try to figure out how to post pictures again to show what I am speaking to....
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  #34  
Old 08-21-2018, 12:22 AM
didja didja is offline
 
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  #35  
Old 08-21-2018, 12:25 AM
didja didja is offline
 
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This was after about 20 minutes of sitting. its just a very small bead that has formed but has not gone anywhere. I'm not sure if this is suitable, or if I should be looking to correct it somehow? It is definitely coming from the gas cap seal, and not the gas cap frame that is sealed and riveted in place. When I pressed on the first gas cap that was leaking a solid stream, the stream would stop, and then when I replaced the gas cap with the other gas cap that was supplied by vans, this was the end result, so I am very confident that it is just the o-ring seal on the cap itself.
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RV-14a Kit# 140432
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  #36  
Old 08-21-2018, 01:28 AM
didja didja is offline
 
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Well, never mind, Iím an idiot! After looking at the cap some more, I realized it had a spring tension nut and simply tightened the nut a couple turns. Problem solved and no leak at the cap....
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  #37  
Old 08-21-2018, 09:14 AM
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RV-14E RV-14E is offline
 
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Quote:
Originally Posted by didja View Post
Well, never mind, Iím an idiot! After looking at the cap some more, I realized it had a spring tension nut and simply tightened the nut a couple turns. Problem solved and no leak at the cap....
Here's that nut.

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  #38  
Old 08-21-2018, 09:41 AM
jerry sparks jerry sparks is offline
 
Join Date: Aug 2013
Location: Scottsdale AZ
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I did my own tanks on my 14A at KDVT. Call me and I can give you a couple of pointers. Jerry
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  #39  
Old 09-01-2018, 11:44 AM
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kbalch kbalch is online now
 
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Default

As it turned out, the tanks were no big deal. Lots of fuss and dread over nothing. I used a Semco gun and a combination of wooden tongue depressors & acid brushes.

Aft baffle rivets were dimpled and all shop heads were encapsulated in sealant. The insides of each tank may not be gorgeous, but nobody will ever (hopefully!) see them. The first tank had two tiny leaks by the attach bracket and the second tank was leak-free.

FWIW, I have 37.25 in the left tank from fluting the ribs through final installation on the wing. Right tank is at 23.0 and ready to install on the wing. Guess I learned something along the way!

Naturally, I won't be completely out of the proverbial woods until they've proven to hold fuel, but I feel much better about the whole thing now.
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RV-8 N118KB (sold)
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  #40  
Old 09-01-2018, 02:08 PM
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schristo@mac.com schristo@mac.com is offline
 
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Location: WA
Posts: 958
Default build your tanks...

This thread makes no sense!

Building tanks is really not a big deal and working with pro seal is pretty fun.

Like anything new, there are learning steps and some frustration but it is worth it.
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