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914World.com _ 914World Garage _ Gas Tank Line Seals
Posted by: SteveL Mar 23 2023, 12:49 PM
Hey all,
I have been fighting an engine dying issue for a while, and am at the step of replacing the fuel sock in the tank and cleaning the tank.
I have the tank drained and removed. The tank is awesome. The sock might have had enough crap on it to cause the issue, we'll see.
Anyway - 2 lines on bottom of tank, supply with sock and return. I ordered the sock a while back (I think from 914Rubber?) and it came with a copper washer the same as the larger one in the pic. The return line also had a gasket, but it is a fiber washer, not copper. Looking for that gasket, I saw on the AA site that they have a large and small fuel tank seal listed, so I ordered a set thinking it would have me covered.
So, the smaller copper washer from AA appears to be the right size for both lines. But if that is the case, why did the sock come the larger washer?
Which is right for each? I want to be damn sure this is right, as reinstalling and filling the tank is a crappy way to find out it leaks.
Thanks!
Posted by: second wind Mar 23 2023, 01:27 PM
I am in the middle of changing all of my rubber fuel lines as last time I did this I somehow used inferior fuel lines that does not hold up with the current gasoline formulations. I have SS lines down the tunnel and will be using R30 9 rubber lines for the rest. I plan on using Permatex Permashield Gasket Dressing on every connection in the fuel system. I am not going to do this job again and plan on not having too for a very long time. I have used this product before and it is awesome and works great. The fuel system will probably not leak anyway but using this product will be my fail safe. I am using fabric washers. Good luck to you and to me as well.
All the best,
gg
Posted by: SteveL Mar 23 2023, 01:31 PM
I am in the middle of changing all of my rubber fuel lines as last time I did this I somehow used inferior fuel lines that does not hold up with the current gasoline formulations. I have SS lines down the tunnel and will be using R30 9 rubber lines for the rest. I plan on using Permatex Permashield Gasket Dressing on every connection in the fuel system. I am not going to do this job again and plan on not having too for a very long time. I have used this product before and it is awesome and works great. The fuel system will probably not leak anyway but using this product will be my fail safe. I am using fabric washers. Good luck to you and to me as well.
All the best,
gg
Where did you get the fabric washers?
Posted by: second wind Mar 23 2023, 02:58 PM
I am in the middle of changing all of my rubber fuel lines as last time I did this I somehow used inferior fuel lines that does not hold up with the current gasoline formulations. I have SS lines down the tunnel and will be using R30 9 rubber lines for the rest. I plan on using Permatex Permashield Gasket Dressing on every connection in the fuel system. I am not going to do this job again and plan on not having too for a very long time. I have used this product before and it is awesome and works great. The fuel system will probably not leak anyway but using this product will be my fail safe. I am using fabric washers. Good luck to you and to me as well.
All the best,
gg
Where did you get the fabric washers?
At my FLAPS....I actually had to do some drilling to get it just right. Copper sounds good but I am just going with the fabric. Seeing gasoline puddles really isn't very much fun so I am hoping the new rubber and the sealant do the trick.
Posted by: 76-914 Mar 23 2023, 04:48 PM
FWIW, I've found two tanks that had two washers on one the nipples with the sock. If you don't look carefully you'll think an old washer is part of the nipple since it has the thread marks after the side of the washer is compressed against the nut for years. But you can pry the old washer off the tank nipple with your pocket knife. 
Posted by: Jamie Mar 23 2023, 05:42 PM
Hey all,
I have been fighting an engine dying issue for a while, and am at the step of replacing the fuel sock in the tank and cleaning the tank.
I have the tank drained and removed. The tank is awesome. The sock might have had enough crap on it to cause the issue, we'll see.
Anyway - 2 lines on bottom of tank, supply with sock and return. I ordered the sock a while back (I think from 914Rubber?) and it came with a copper washer the same as the larger one in the pic. The return line also had a gasket, but it is a fiber washer, not copper. Looking for that gasket, I saw on the AA site that they have a large and small fuel tank seal listed, so I ordered a set thinking it would have me covered.
So, the smaller copper washer from AA appears to be the right size for both lines. But if that is the case, why did the sock come the larger washer?
Which is right for each? I want to be damn sure this is right, as reinstalling and filling the tank is a crappy way to find out it leaks.
Thanks!
I trashed 2 socks trying to install in the tight tank fittings and just eliminated it, have 2 external line filters to allow access and visual checks.
Posted by: r_towle Apr 30 2023, 12:35 PM
is there a diagram that shows ALL these washers for the two fittings above?
Rich
Posted by: r_towle Apr 30 2023, 03:45 PM
So,
This is the way I am guessing things go together,
I think there is a washer wedged into the nut that holds these into the tank.
It was full of some pretty hard adhesive which I have been trying to dissolve.
Still not sure if there is a washer in there .
Rich
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Posted by: zoomCat Apr 30 2023, 03:53 PM
is there a diagram that shows ALL these washers for the two fittings above?
Rich
Posted by: r_towle Apr 30 2023, 04:22 PM
Interesting
It shows no washer inside the nut.
It also shows no home for the large washer that fits over the strainer.
@http://www.914world.com/bbs2/index.php?showuser=4947
Comments?
Posted by: slowrodent Apr 30 2023, 05:03 PM
i experienced this exact same dilemma....My tank is not yet installed. I guessed at it, but am not certain.. I hope someone chimes in with a configuration that has at least proven to be leakproof...
Posted by: copilot May 4 2023, 03:03 PM
Interesting
It shows no washer inside the nut.
It also shows no home for the large washer that fits over the strainer.
@http://www.914world.com/bbs2/index.php?showuser=4947
Comments?
I think #15 914 201 213 10 is the washer. The diagram on AA shows it as NLA.
My gas tank has been out for months now as I haven't seen a definitive answer on where the gaskets go on the tank pipes. Don't want to find out it leaks after it is all back together.
Posted by: r_towle May 4 2023, 05:09 PM
Fitting, fiber or copper crush washer, big fatty o-ring , screen
Fitting , fiber or copper washer, done
I’m committed, yet I have not tested yet.
Still need to complete the engine bay rubber hoses.
Rich
Posted by: Garland May 4 2023, 10:47 PM
I just this week replaced my tank, supply line, pump, filter, hose, and screen. Reused original fiber washers before, as I did this time. If they appear brittle, leave them on the tube/nipple and soak them in water for a short time. They will swell a bit and easily slide off the tube, and be reusable.
I have never seen an addition washer of any type used. Only as the illustration shows below.
Also just rechecked for that washer, on the old tank fittings, not there.
Posted by: SteveL May 5 2023, 06:42 AM
I installed exactly as in the diagrams above- metal sealing washers only - and no leaks.
Posted by: copilot May 6 2023, 12:10 PM
I installed exactly as in the diagrams above- metal sealing washers only - and no leaks.
Hey Steve.
I have a 1975, so I ordered the small copper seals from AA.
They have a 10mm id and fit really loose on the spigots. The original copper seals fit snug on the spigots and had a 8mm ID. I don't know if these originals started out loose and crushed to fit snug on the spigot.
Were the copper seals you used loose or tight on the spigots? Thanks.
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