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Fuel tank leaking how to solve problem gas is not pouring out but is seeping through bottom of tank

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I don't think you will have any luck sealing this from the outside.
Removing the tank (preferably empty), filling it with water and soldering all of the seams (if metal) or replacing it if of plastic.

This could be sloppy manufacturing showing up late, stress from being slammed underneath (is there signs of dents or scrapes?) or if metal, it might be rusting through which is pretty much a death sentence for it.
Pouring some (a cup or so) methanol, pure ethanol or a commercial product intended for that use, into your tank now and then will cause condensation to bond to the gasoline where it will pass though the system and out.

Posted on Aug 10, 2008

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Strong smell of gas..no visible leak...Any input??


All it takes is to have fuel seep for a smell. Inspect all fuel lines and fuel injectors/pressure regulator for dampness/stains. Make sure fuel cap seals well. If fuel tank is filled to the max, it can cause the charcoal canister to fill with fuel as well resulting in a gas smell.

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The Gas Gauge---worn out sending unit in fuel tank

Check the fuel hose going to the pump on the
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Also check for a leaking fuel pump gasket, between
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Nothing seeping under the hood,have to look around
the tank area where hoses leave the fuel,return & evap
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Gas smell but not any leaks


Depending on the Year of Expedition there was a recall for Gas tank straps. Those units having shields for the Off-road package kept the gas tanks from falling off the vehicle. For units without the shields, the tank could hang from the remaining strap which would put all the pressure on the remaining strap.
The repair for the strap is free under Warranty.
There are other parts which may fail. The main line to the fuel pump can rust. Any metal component up to the fuel injectors can likewise fail.
There is also a system for the Emissions and the vapors can leak if the hoses have pin holes. A device called a "smoke test machine" is needed to detect these leaks. This is a possibility since you see no fuel puddles under your vehicle.
A tiny fuel leak can seep and evaporate while the vehicle is in motion.
I would call in the vehicle VIN# and see if your particular unit has been recalled for the straps. An inspection under the vehicle would be useful. After that, do a "smoke test".

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Car runs rough n stalls at times


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Jul 12, 2012 | 1992 Buick Regal

2 Answers

Gas leaks out of the bottom, but only when I gas up. It doesn't leak at any other time, but it is preventing me from putting gas in the car. I took it to a named brand mechanic shop close to my home...


Its leaking from the tank?
You might need some new tubing.
If there is a hole in the tank try to find it and use putty/epoxy to seal it.
This is a simple leak, there is no need for an entire new fuel system

Sep 24, 2011 | 1996 Chevrolet Monte Carlo

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I have a 88 Fiero GT V6 that has sat for over a year without starting. I put in 5 gallons of gas, and used starting fluid. Starts, but only keeps running while fuel is poured into intake. I suspect water...


1) Running fuel pump to remove water from tank will likely not empty it all, but it might help. Will still be some liquid in bottom of tank.

2) More than likely, the gas has gummed up and is no good, While your draining of the tank will help, may still need to change the fuel filter and clean the injectors. The ability to keep engine running while pouring into the intake is a good sign, but mayfind that more parts need to be cleaned and replaced prior to solving the problem.

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1 Answer

We have a 2001 sportage the gas tank is seaping on the top. Recently it started to start harder( turns over longer before firing). Today the check engine light came on and the car misses like its starving...


I dont know why gas would be "seeping". if its leaking, thats a problem. have the fuel pressure checked, if its low, the tank will have to come down for possible fuel pump replacement, and the leak found and corrected at the same time (possibly the fuel line is leaking back there?)

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Fuel tank leaking how to solve problem gas is not pouring out but is seeping through bottom of tank There is fuel leaking from the top of the tank, is it a fuel overflow release or is the seal on the fuel...


If your gas tank is cracked or has a hole in it, you have to drain the tank, remove the gas tank and replace it, or have it repaired (if possible). If the gas tank is just leaking from the top and dripping along the side and to the bottom, you will still have to empty the gas tank, and remove it to get a good look at the condition of the gasket. It is not uncommon for these gaskets to become cracked or fragile over time because of the harsh chemicals and cleaning agents used in unleaded gas. If you do decide to have the gas tank removed, I would recommend replacing the fuel pump and fuel filter if your car has high mileage. Please rate this response if you found this helpful.

May 29, 2009 | 1995 Jeep Grand Cherokee

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