1965 gas tank leaking - Vintage Mustang Forums

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post #1 of 18 (permalink) Old 06-26-2010, 02:02 PM Thread Starter
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1965 gas tank leaking

Hey guys my 1965 gas tank is leaking at the petcock or where the fuel lines hook up. i had a fuel pump go out and i had to pull the electric pump off just to get home. so i hooked up the lines back to the tank bypassing the fuel pump. well i had to turn the hose port on the gas tank and now its leaking, is this fitting welded into the tank and it just rusted or is there a seal on that tank where the fitting goes in.
thanks
Matt

1965 Mustang Deluxe aka Pony car. daily driver, 306 Cobra ,Edelbrock Performer RPM heads, Edelbrock 1406 carb modified, Full electric MSD ignition and distributor. custom long tub headers and flowmaster exhaust. My stang http://forums.vintage-mustang.com/me...s-my-pony.html
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post #2 of 18 (permalink) Old 06-26-2010, 02:15 PM
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Quote:
Originally Posted by mhart032 View Post
Hey guys my 1965 gas tank is leaking at the petcock or where the fuel lines hook up. i had a fuel pump go out and i had to pull the electric pump off just to get home. so i hooked up the lines back to the tank bypassing the fuel pump. well i had to turn the hose port on the gas tank and now its leaking, is this fitting welded into the tank and it just rusted or is there a seal on that tank where the fitting goes in.
thanks
Matt
The tube is permanently attached. If the tube is leaking, the sender is trashed.

Amateur restorer. Well, sometimes I have been paid for it. But not right now.
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post #3 of 18 (permalink) Old 06-26-2010, 02:16 PM
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did you twist it tight enough. and if all else fails weld it
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post #4 of 18 (permalink) Old 06-26-2010, 02:20 PM
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If you have a stock tank (donno what was done/modified for electric pump) the fuel outlet is on sender. The sender is removeable and has a seal/gasket/O ring to the tank.

My '64 1/2 vert. Ordered May '64. D code 4 speed, handling package, caspian blue, accent group, Ford blue manual top.

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post #5 of 18 (permalink) Old 06-26-2010, 02:22 PM
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OMG! Don't weld by/on the gas tank!
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post #6 of 18 (permalink) Old 06-26-2010, 02:38 PM
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Like 22GT said. If it's leaking where the fuel line/tube comes out (that's the sender) the sender is likely shot.
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post #7 of 18 (permalink) Old 06-26-2010, 02:44 PM
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theres a lock ring that holds sender to tank-remove by tapping ring to remove.then u can braze or solder the tube to the sender again or replace sending unit. wes
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post #8 of 18 (permalink) Old 06-26-2010, 05:21 PM Thread Starter
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Guys, its not the sending unit. its the elbow that is attached to the tank. its leaking from around the 2.5 inch hole in the tank. the sending unit is working fine.

1965 Mustang Deluxe aka Pony car. daily driver, 306 Cobra ,Edelbrock Performer RPM heads, Edelbrock 1406 carb modified, Full electric MSD ignition and distributor. custom long tub headers and flowmaster exhaust. My stang http://forums.vintage-mustang.com/me...s-my-pony.html
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post #9 of 18 (permalink) Old 06-26-2010, 05:25 PM
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Guys, its not the sending unit. its the elbow that is attached to the tank.
No such thing, unless home-made.

its leaking from around the 2.5 inch hole in the tank. the sending unit is working fine.
Then you need the square o-ring seal.

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post #10 of 18 (permalink) Old 06-26-2010, 06:07 PM
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OMG! Don't weld by/on the gas tank!
hahahaha, my exact thoughts.
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post #11 of 18 (permalink) Old 06-26-2010, 06:13 PM
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Originally Posted by mhart032 View Post
Guys, its not the sending unit. its the elbow that is attached to the tank. its leaking from around the 2.5 inch hole in the tank. the sending unit is working fine.

The sending unit can be working fine and still leak! Two places it can be leaking. The O ring at the 2" hole, or where the sending connection comes through the middle. Neither affects the gauge reading!

My '64 1/2 vert. Ordered May '64. D code 4 speed, handling package, caspian blue, accent group, Ford blue manual top.

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post #12 of 18 (permalink) Old 06-26-2010, 06:31 PM Thread Starter
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ok i see whats your saying. i think the o-ring mite be bad. or when i turned the elbow i may have just loosened the connection. but if i correct this can be replaced without replacing the fuel cell correct?

1965 Mustang Deluxe aka Pony car. daily driver, 306 Cobra ,Edelbrock Performer RPM heads, Edelbrock 1406 carb modified, Full electric MSD ignition and distributor. custom long tub headers and flowmaster exhaust. My stang http://forums.vintage-mustang.com/me...s-my-pony.html
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post #13 of 18 (permalink) Old 06-26-2010, 06:43 PM
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A while back I said is it stock fuel tank? No reply! If you don't say what you have how can we help?
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post #14 of 18 (permalink) Old 06-27-2010, 05:30 PM Thread Starter
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Sorry its the stock fuel tank.
Matt

1965 Mustang Deluxe aka Pony car. daily driver, 306 Cobra ,Edelbrock Performer RPM heads, Edelbrock 1406 carb modified, Full electric MSD ignition and distributor. custom long tub headers and flowmaster exhaust. My stang http://forums.vintage-mustang.com/me...s-my-pony.html
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post #15 of 18 (permalink) Old 05-11-2015, 08:24 PM
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I'm having the same issue on my 65, and I've a brand new tank. I was hoping there'd be a YouTube video on making sure that whole assembly is correctly fitted.
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