The two lines are pick-up & return.
If the two pipes are different thicknesses, then probably one pipe will be a good fit on only of the tank outlets.?
Also, when you put the old pipes up to the tank connectors they may be formed into a shape which will give you a strong clue as to which way round they fitted.?
Failing that, put something (like a golf tee) lightly into the ends of the two fuel pipes
Then, go to the fuel-filter near the engine & take the fuel-tank side connector off.
Blow down the pipe & whichever golf tee has blown out of the pipe, is your fuel pick-up & the other one will be your return pipe.
Don't forget to re-connect your pipe at the fuel filter.
Best of luck.
SOURCE: 1994 Jeep Grand Cherokee fuel spilling?
it could be two things: the hose that is connected to the top of the tank has a hole in it or the tank itself has a hole
SOURCE: 1991 jeep wrangler gas leak
Hello everyone,l
For those of you who haven't started removing the gas tank, I'll start from the beginning.
You will need a 1/2" socket, ratchet, extensions, flat head, needle nose, floor jack, rag, broomstick,. A creeper will make this easier. Depending on your dimensions and the height of the frame on your particular vehicle, you may be able to use it without jacking the vehicle up..
If you were experiencing a line leak, the top of the tank is where you'll find it. Inspect hoses, gaskets and connections
SOURCE: Disconnect fuel lines from fuel tank
There are two types of connectors on these lines. Either brightly colored quick-connects which do not require tools, (Just squeeze the tabs together). Or black quick connects which must be pushed back to remove line.
SOURCE: Regulator / Fuel line leak
There is a rubber O-ring either on the end of the fuel line or inside the nipple.
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