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Author Topic: fuel tank differences between early and later years?  (Read 1618 times)

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Offline 72pintoproject

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fuel tank differences between early and later years?
« on: April 06, 2013, 09:44:22 AM »
Hello,
I have a 72 sedan with a soldered tank repair. I would feel more comfortable with a new or rust free one. The tanks are available for the later years. Has anyone successfully fitted the later sedan tank on an early model? If so does it tuck behind the valance? Will the filler pipe line up? Will the sender from the 72 fit the later tank and read somewhat accurate? Thanks,

Offline D.R.Ball

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Re: fuel tank differences between early and later years?
« Reply #1 on: April 07, 2013, 11:59:58 PM »
What's wrong with a soldered tank repair ? That's how the gas tanks are usually fixed or hell , sealed from the factory when your car was new. Has it been leak tested ? If so and it has no leaks it's good to go...I do not trust the epoxy method with today's gas, it can and will fail....Now if I had a plastic tank and the right epoxy yes I would feel safe . Plastic types have to match the type of epoxy used. For metal gas tanks best repair is either welding or soldering, along as the tank is fume, gas free and done by some else....(No Boom , boom...)

Offline HOSS429

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Re: fuel tank differences between early and later years?
« Reply #2 on: April 08, 2013, 06:08:21 AM »
i have  a 73 tank in my 80 and now have a new 80 tank in my 73 so yes they will fit all models in the non stationwagon types .. the filler neck came from a 76 .. the sending unit came from a 69 mustang but it is not a direct fit .. someone on here said a 71 is a better fit .. with some mods ....

Offline 72pintoproject

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Re: fuel tank differences between early and later years?
« Reply #3 on: April 08, 2013, 06:44:56 AM »
There is nothing wrong with a soldered repair. I realize that's how rad tanks are fixed and they have positive pressure. With the gas tank there was a pinhole right fair in bottom. I had let the drained tank sit out in a garden shed most of the winter to air it out. Last week I filled it up with exhaust and soldered it. The problem is I didn't have the nerve to use a propane torch, I used a 175 watt solder iron. No problem getting the solder to flow, so I'll assume it bonded to the steel well. I installed it back on the car and tested it with about 1/4 tank of gas. It doesn't leak, but the reason why I'm a little unsure is I don't know if it would start to leak if it was filled up. (more pressure on the bottom with a full tank?) Also would a soldered repair deteriorate over time? I store and work on the car in a heated garage where I store other cars. There is a forced air furnace in the common area and I wouldn't want a leak to develop unattended. But if I Knew the repair would last for years I really don't need a new tank.
From HOSS429 it sounds like a later tank would fit an early model. Did you use your 73 straps on the 80 tank?
Thanks

Offline 289Wagon

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Re: fuel tank differences between early and later years?
« Reply #4 on: April 08, 2013, 07:27:05 AM »
 I know this will sound crazy, it was something a read in a '50's era 'fix it book'.  Regular  'bar soap' rubbed into a gas leak will give you an emergency repair. I know this works because I did it on my M/C tank when I was far from home. Can't hurt to throw a bar of 'motel' soap in with the spare tire.
  ;)
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Offline HOSS429

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Re: fuel tank differences between early and later years?
« Reply #5 on: April 08, 2013, 11:03:12 AM »
if you have a pinhole that you suspect may have been caused by internal rust you may need to take a sharp object and poke around a bit in the general area looking for thin metal ... yes the straps from the 73 fit the 80 tank and vise versa ....

Offline D.R.Ball

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Re: fuel tank differences between early and later years?
« Reply #6 on: April 08, 2013, 12:31:38 PM »
The electric soldiering iron should do the job. Did you use any flux ? If you  did your good to go.. As for replaceing the tank ? If you fixed it why spend the money....(That is if you fixed it)...The soldier will hold up as long as you did three things,  cleaned up the area with a wire brush, two, used a good flux and three got a good silver color on the soldier....Not e, yes there are still people in the world who make cash doing what you just did , still more make money selling parts.