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Cletus Emmett Wheelwelker
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Discussion Starter #1
So living in a northern state, I store my car every winter in an unheated garage. Today, I looked under the rear end and noticed that the outside right corner of the fuel tank was wet. I could also smell gas. There's no puddle or any signs of a drip on the floor (I suppose the gas might be evaporating). I always store the car will a full tank of gas.

Recently, it's gotten down to -20˚ at night. I don't know if that could cause any issues. Last winter was even harsher and I never noticed this. The tank itself is intact and isn't rusted.

So any ideas on what could cause this? I'm thinking condensation in the filler neck has eaten away at it, or it's the grommet on the tank. I've never noticed a leak when filling up, however.

Here's a photo:

 

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King Trashmouth
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Considering it's around the filler neck I'd bet it's the grommet or the fill neck itself. Also keep in mind that road spray and salt can do funny things for making areas wet and drawing moisture. Wipe it clean and see if you can determine where it's coming from. Gas is definitely tough to track as it likes to evaporate quickly.
 

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Cletus Emmett Wheelwelker
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Discussion Starter #3
Alright, thanks. I'll wipe it off and see if it comes back.

If it's the neck or grommet then it's just one more thing to add to the spring repair list.
 

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take a look at the filler neck side. if gas does drip on the ground it will leave a stain on light colored concrete. the grommets usually don't just go bad unless you pull the filler neck/drop the tank and tear the grommet. not saying you have or dont have a leak but you should crawl around and see if you can locate it.
 

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Cletus Emmett Wheelwelker
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Discussion Starter #5
Okay, noted.

I'll get under there and check it out when it gets warmer. Crawling on a cold cement slab isn't my type of party.
 

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Super Moderator
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More then likely the filler neck Grommet as suggested. With the age of these cars now a lot of the rubber parts are starting to harden and will be requiring replacement. You will definitely notice this after a fill up.
 
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i would defiantly fix it before you take it on along trip. as you can see the exhaust is pretty close to that leak.
 

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Cletus Emmett Wheelwelker
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2,575 Posts
Discussion Starter #8
More then likely the filler neck Grommet as suggested. With the age of these cars now a lot of the rubber parts are starting to harden and will be requiring replacement. You will definitely notice this after a fill up.
That's kind of what I figured. Good thing I noticed it now, and not when I'm leaving a trail of fuel down the road.

i would defiantly fix it before you take it on along trip. as you can see the exhaust is pretty close to that leak.
If it really is the grommet, it'll get fixed ASAP. The only trip I plan on taking is to Mustang Memories in August.
 

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Cletus Emmett Wheelwelker
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Discussion Starter #9
A little update.

Today I reached my hand under the car and felt around the grommet. It's rock solid, which is to be expected since it's cold out. When I pulled my hand back my fingers reeked of fuel, so I'm almost certain it's the grommet leaking.
 
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