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Old 12-08-2005, 05:21 AM   #1 (permalink)
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Gas tank has been sitting a while

My gas tank has been sitting a while (5 years+) with some gas in it. My plan was to remove the tank and clean it out real well. I was going to put some chain in there and roll it around to knock any corrosion loose etc.

Is this what I need to do? Or should I just drain the tank?

BTW, it is in a '64 Falcon, should not be too hard to remove the tank, and I am replacing the fuel line as well.

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<font size=-1>[ This Message was edited by: FlyByFord on 12/8/05 8:21pm ]</font>
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Old 12-08-2005, 06:18 AM   #2 (permalink)
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Gas tank has been sitting a while

put bb's in it and then shake it around. or take it to a radiator shop and have them open it up so they can dip it in the acid
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Old 12-08-2005, 07:11 AM   #3 (permalink)
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Gas tank has been sitting a while

Here's a little something for ya...
Radiator shops' tanks for cleaning radiators will NOT effect fuel build up nor rust... It will burn your skin, but the caustic mess in those tanks will hardly even soften the varnish in a fuel tank.
If you take your fuel tank there they will talk a lot of crap or they will pressure wash it and use a Urethane Tank Liner.
and 90% of the radiator shops now~a~days don't even stock the Tank liner anymore.

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Old 12-08-2005, 08:47 AM   #4 (permalink)
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Gas tank has been sitting a while

Always store a care with a FULL tank of gas. Partially filled tanks go stale and nasty FAR sooner. Add Sta-bil in a double dose as well. If you did that, the tank would have no problems right now..... even after five years.
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Old 12-08-2005, 08:40 PM   #5 (permalink)
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Gas tank has been sitting a while

My car sat for 4 years with almost a full tank of gas, I drained and after a while the tank started to leak and I gummed up the carb. I then put in a new tank. If it was me I would just get a new tank for it. It was pretty cheap for my Mustang, I do not know about your Falcon. HTH
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Old 12-08-2005, 11:08 PM   #6 (permalink)
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Gas tank has been sitting a while

I gotta get the Mustang driven when I get home. It's got summer blend fuel in it and has had it for about 4 months. I bought some Sta-Bil but forgot to put it in before heading back last time.
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Old 12-09-2005, 08:28 AM   #7 (permalink)
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Gas tank has been sitting a while

You don't want open space (air) above the fuel. This give the fuel a place to evaporate into. As all the lights evaporate, a gel is left behind. Worst case scenario is to leave a car sitting with a 1/4 tank or less. There is tons of air space above the fuel, and it doesn't take long for that little bit of fuel to evaporate mostly away and turn to gum and varnish.

As for Sta-bil.... Simply adding it to the tank will not protect the carb. The car will need run long enough to get the fuel into the carb. It will also need run hard to get the fuel into the secondary fuel bowls. It's also a good idea to start the car every so often to keep the small amount of fuel in the carb flushed.

A FULL tank with a double dose of Sta-Bil is the best bet for protecting against stale and varnish deposits. Keeping the car in a cool, shady place will also help, as heat will make the fuel go stale more quickly.
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Old 12-09-2005, 09:42 AM   #8 (permalink)
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Gas tank has been sitting a while

yeah..... it definitely has like 1/4 tank. Uh oh.

And yeah I knew you'd have to run it to get the fuel into the carb.

Gonna have to thrash on it for a while. Guess I'll just have to run another couple tanks through it over the winter break

And its definitely been in a cool place - the 25 degree garage.

<font size=-1>[ This Message was edited by: thekingofazle on 12/10/05 12:43am ]</font>
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Old 12-09-2005, 01:12 PM   #9 (permalink)
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Gas tank has been sitting a while

I second replacing the tank. It's easy and they're not terribly expensive.


Hey, King, we can take your 'stang to the dyno over the X-mas break and get rid of the gas that's in it. It shouldn't be bad yet.
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Old 12-10-2005, 03:55 PM   #10 (permalink)
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Gas tank has been sitting a while

I'm hoping not. I'll probly drive it during the christmas break a bit, cause the volvo just isn't doing it for me in the power department.
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