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EFV-8 Club Forum / General Ford Discussion / 51 Ford Custom Gas Tank Leak

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Discussion Topic: 51 Ford Custom Gas Tank Leak -- page: 1 2 3

Greg58

04-18-2018 @ 6:14 PM

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Fuel line and brake lines have double or inverted flares, they are the hardest to make correctly. A simple repair would be a male fitting and a short section of hose, I did this when I installed a electric fuel pump at the tank.

Greg

TomO

04-18-2018 @ 8:30 AM

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Great news. Now you can enjoy your car without worrying about it going up in flames.

I agree that the flare you had done was done incorrectly.

Tom

04-17-2018 @ 9:33 PM

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I talked to a local V8 Club friend who has the same car. He felt the fuel line/fitting I had were correct. He suggested I go to Napa and get 5/16 OD line and fitting. Napa did not have yhe 6 foot length I needed, but Carquest did. I have installed and have taken a few trips. I’m leak free so far! I believe the flare was done poorly and was the cause of my leak. Thx all again for the push to resolve this critical issue.

TomO

04-03-2018 @ 9:07 AM

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I could not get a good photo of the flare on my Lincoln fuel line. I cannot hold the camera steady enough while laying under the car and the autofocus wants to focus on the frame crossmember. My flare does look different from yours.

Tom

TomO

04-02-2018 @ 7:43 AM

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The flare on your line may be incorrect. This PDF file shows the common automotive flares and their sizes.

http://www.fedhillusa.com/webnuts/common%20flares6.pdf

My 53 Lincoln uses the 5/16" steel line that your car has and the end is flared. I will try to get a photo of the end with the fitting and post it for you, so you will have a reference of how Ford did it.

Tom

trjford8

04-01-2018 @ 1:35 PM

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DJ, Yokomo99 shows the correct fittings for your car. I think you may be able to buy them at your local Napa Auto Parts store. I know for sure you can get the ferrule there.

Yokomo99

04-01-2018 @ 1:14 PM

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That is not the correct fitting. You are showing a flare fitting, that is for a more modern car. The original is a male compression fitting. I show a picture of the ones I bought for my 53 Customline. I bought the correct fittings at McMaster Carr. You might be able to use your fitting. Just cut off the double flare and get a 1/4" compression ferrule to replace it. The taper of the double flare is not the same but it might work in a pinch.

Be sure to check out my YouTube pages at:

https://www.youtube.com/user/MatthewBergin1

https://www.youtube.com/channel/UCJCdOfmXtM8xO9nXeQ-iSQQ

04-01-2018 @ 11:56 AM

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I bought this fitting about a year ago, and would have to go thru receipts to find out where I got it. Appeared to be identical to the old one. Can you tell if it requires a compression fitting?

TomO

04-01-2018 @ 8:25 AM

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Is it possible that you bought a compression type that requires a ferrule to seal? I may be wrong, but it is my understanding that the shape of the sealing surface is different between the flare fitting and the compression fitting. I do not know what the 51 Ford used, flare or compression, but most fuel lines used a compression fitting.

I can tell you that if you have a gas leak in the line, your fuel pump will have a hard time getting its prime. If the line is leaking fuel, it will also leak air making it hard to maintain vacuum on the line.

Tom

03-30-2018 @ 6:26 PM

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Ok, thought I had it completed, but one more issue. The fitting connecting the fuel line to the gas tank was in bad shape. So I bought a new fitting, then took the fuel line to a local auto repair shop. They cut the flair off, then installed the new fitting, and flared it again. I hooked up the line; put about 3 gallons of gas in and no leaks. Today, I filled it up, and look under the car. It had a steady leak from that fitting. I was able to tighten it slightly, but it still has a slow drip. I have drained all the fuel. The lines are steel. Not sure if original. I have a fuel filter in the line right below the drivers door. What would you guys recommend I do? New fuel line? New fitting? I’m not sure if the auto shop did a quality flair job. Thanks much.

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