desoto1939 Posted September 13, 2016 Report Posted September 13, 2016 I discovers a leak at the fuelline where it connects to the tank. I tried to tighten the nut on the line where it connects into the fitting on the fuel tank. The drip stoped but still saw a SMALL leak. I tighten it up somemore then heard a snap. I have drained the tank of all gas. So would they fuel line be a single flare or a double flare setup ANy help asspreciated. I will be pulling the rear wheel and then unscrew the line on Tuesday but just wanted to see if anyones the answer. Rich HArtung Desoto1939@aol.com cell 484-431-8157 . Quote
knuckleharley Posted September 13, 2016 Report Posted September 13, 2016 Here is a tip that might work for you the next time. Anytime I find a fitting that is loose and hard to tighten,I just go ahead and unscrew it all the way and then clean both the male and the female threads,and then put a little lube on the threads before I tighten it again. In this case the lube would be some sort of thread sealer impervious to gasoline. Quote
Andydodge Posted September 13, 2016 Report Posted September 13, 2016 Rich..........as far as I know the original fuel line fitting had a small ferrul on the gland nut which when you tightened the nut was the thing that went SNAP ..........I have had this happen and found the ferrul to have cracked which was the sound you heard.........the use of the ferrul on the tube meant that there was NO flared end on the tube but that the tube had the ferrul pushed onto the tube with the gland nut internal taper pushing the ferrul both against the seat and into the tube by the gland nut when it, the nut was tightened onto the tank fitting..........at least that's how I found them............lol..........you may have to remove a small section of the tube as the old ferrul cuts into the tube and a new one may not seat properly , if this is the case there will be a mark on the tube where the old ferrul cut into or squashed the tube........cut the tube just past this area and replace the gland nut, ferrul and ensure that the tube pushes into the tank fitting perpendicular to the fitting then tighten up the gland nut ............does this make sense?..........lol............andyd Quote
desoto1939 Posted September 13, 2016 Author Report Posted September 13, 2016 (edited) I took the left rear tire off the car and disconnected the fuel supply line from the tank. I noticed that when I heard the snap it was not the internal ferrule but it was the flared connector that scews into the tank. Also the main fuel line is also flared on my 39 Desoto. So I know the 37-39 fuel tanks where all the same number for Chrysler/Desoto/Dodge and Plymouth. So I quess you can assume that Mopar did away with the internal furrell on the compression fitting. I dropped the tank and have taken it to my mechanic to have them remove the fitting and to install a new one. Will try to attach pictures of the cracked fitting and the flared fuel line. Will keep you posted on the repairs. Rich Hartung Desoto1939@aol.com Edited September 13, 2016 by desoto1939 Quote
knuckleharley Posted September 13, 2016 Report Posted September 13, 2016 2 hours ago, desoto1939 said: I see you are a man of few words. Quote
desoto1939 Posted September 13, 2016 Author Report Posted September 13, 2016 Just got the tank returned to me this afternoon. I have a great mechanic that has experience with the older cars. He installed a new fitting into the tank. See picture and now I will put the tank back into the car. Rich Hartung 1 Quote
desoto1939 Posted September 13, 2016 Author Report Posted September 13, 2016 1 minute ago, knuckleharley said: I see you are a man of few words. Yes a few words at that I would say soooooooooo. Got the tank fixed and to reinstall back into the 39 Desoto. Rich Hartung Quote
Andydodge Posted September 13, 2016 Report Posted September 13, 2016 Rich.......I stand corrected.....lol.........andyd Quote
desoto1939 Posted September 13, 2016 Author Report Posted September 13, 2016 44 minutes ago, Andydodge said: Rich.......I stand corrected.....lol.........andyd Andydodge: Yes I also thought there might be the ferrule in the line. This is why I took pictures for the group to show what I had as original lines that were and are still good. Just the tapered connector at the gas tank failed and cracked. The tank is back in the car and bolted up snugly and the lines are connected and also the line to supply the gas to the tank from the fender opening. Hopefully on Wed I will get som etime to partially fill the tank to see if there are any leaks grossing my finger that there are none. Great learning experience for me. Rich Hartung Quote
desoto1939 Posted September 14, 2016 Author Report Posted September 14, 2016 Update on the gas tank install 9/14/16 11:30 EST. Installed the tank last night and made all the connections. Put approx. two gallons in the tank. No drips at any of the connection points such as gas line coming out of the tank, petcock bolt to empty the tank and no leaks on the filler tube. Let it sit for a half hour, then turned on the electric fuel pump to pump gas up to the engine. Started the car and rechecks all points again and stillno leaks. Going to let it sit for some more time and then will drive to get more gas in the tank. Great learning experience for me to remove the tank and put it back into the car. Rich Hartung Desoto1939@aol.com Quote
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