BIG gas leak
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Launching!
Joined: Dec 2008
Posts: 235
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From: Lebanon TN
BIG gas leak On my way home the other night, i saw my buddy who was behind me flash his hazards so i pulled over to see what was up. We had just gotten off the interstate by way of a very long tight off ramp that curved to the right. anyway he said when i was in the turn it looked like i lost about a gallon of gas.(I had just filled up about 15 miles ago.) When i stopped about a half mile to a mile down the road there was still gas puddled in the under side of the bumper close to the right wheel well. So i am just trying to figure out where it came from. I had no luck when i checked it out today. even took some hard right handers with no luck. Pretty sure the gas cap was on tight cause around the cap wasn't wet when i pulled over last night. The next thing i was going to do is drop the tank but it actually looked pretty involved so i thought i would see what you guys thought the problem might be.
Teching In
Joined: Jan 2006
Posts: 19
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From: Massachussetts
Sounds like it might be the filler pipe itself, or rotted around the inlet to the tank, could also be on the top of the tank where the sending unit mounts that area can get wet and it takes forever for it to dry, thus causing rust. or possibly the seam may have failed due to rust. If its not leaking with the vehicle idling i doubt its a line, even the return line would leak while running.
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Teching In
Joined: Jan 2006
Posts: 19
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From: Massachussetts
If you cant see the prob from the bottom of the tank, and the filler pipe looks ok the only way to inspect the top is either drop the tank, or do what a lot of people do and cut a whole in the floor and make a trap door to the sending unit. I've never done that so I don't have any good tips on it, but im sure you can dig up something on it on the site somewhere.
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If you cant see the prob from the bottom of the tank, and the filler pipe looks ok the only way to inspect the top is either drop the tank, or do what a lot of people do and cut a whole in the floor and make a trap door to the sending unit. I've never done that so I don't have any good tips on it, but im sure you can dig up something on it on the site somewhere.
The only thing I did differently is I didn't cut one of the sides all the way, and made my own little trap door, that way I could open it back up if I ever needed access to it again.
Registered User
Joined: Oct 2009
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as a advisor
I can tell you that GM has used both steal lines as well as high pressure rubber lines. The fuel pump is in the tank, there for you are right in saying that it only leaks when the engine is running. That tells me that it is on the outlet side of the fuel pump. You could always replace a steal line with and aftermarket High-temp; high pressure rubber fuel line. It is less expensive to repair, and far easier than replacing the metal one. Good luck and I hope this helps.
I can tell you that GM has used both steal lines as well as high pressure rubber lines. The fuel pump is in the tank, there for you are right in saying that it only leaks when the engine is running. That tells me that it is on the outlet side of the fuel pump. You could always replace a steal line with and aftermarket High-temp; high pressure rubber fuel line. It is less expensive to repair, and far easier than replacing the metal one. Good luck and I hope this helps.