Gas Tank!
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Freshman User
Joined: Jun 2003
Posts: 30
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From: Albuquerque, NM
Gas Tank!
Hi all, I have a 1968 F-100 with 2 gas tanks. today i just found a leak in the cab gas tank. 
Can anyone tell me if it will be worth welding the tank closed or just buying a new tank?
Can anyone tell me if it will be worth welding the tank closed or just buying a new tank?
Senior User
Joined: Jun 2003
Posts: 113
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Gas Tank!
if it's leaking because of rust or something, get another one, but if its some kind of damge that happened to it you may be able to fix it............and just so i sleep at nite i'll just remind every one out loud about making sure a gas tank is not only empty but VAPOR FREE before attempting any welding...lol...
i have the behind seat tank in my 68 f 100 and i have mixed feelings about it, but theres a place where it had the 2 side tanks so some day i may add one there just for more capacity.............
it also depends on how cheap it would be for a new behind the seat tank..........if you have an existing tank and the behind the seat one is really bad you might wanna just scrap it, have some room for tools behind your seat and add another on the other side of the truck..........one thing about these trucks, you can get pretty darn creative with adding fuel tanks..........
i have the behind seat tank in my 68 f 100 and i have mixed feelings about it, but theres a place where it had the 2 side tanks so some day i may add one there just for more capacity.............
it also depends on how cheap it would be for a new behind the seat tank..........if you have an existing tank and the behind the seat one is really bad you might wanna just scrap it, have some room for tools behind your seat and add another on the other side of the truck..........one thing about these trucks, you can get pretty darn creative with adding fuel tanks..........
New User
Joined: Sep 2002
Posts: 19
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From: Gaithersburg, MD
Gas Tank!
I too had mixed feelings about the in cab tank, so I took it out and used the factory aux tank only. The aux tank works great if you don't do long distance towing. I ordered a fuel cell to mount in the bed a few days ago, because I get 7mpg towing and stopping every two hours sucks or hour and a half when I'm climbing hills. The room you gain behind the seats is nice, I built some speaker boxes to go back there which is a lot better then the mono speaker in the dash.
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Gas Tank!
My old 70 F100 developed a leak in the tank. I removed the tank to find that the rub pads had moved a bit and it was metal to metal and rubbed a small hole. I used Seals ALL and never had a problem after that. I put a small piece of rubber over the spot so that it could not touch anymore.
I have had tank work done at radiator/gas tank shop here locally. No problems then.
If it is a simple leak, use Seals All. It gels up and seals permanently.
Larry
I have had tank work done at radiator/gas tank shop here locally. No problems then.
If it is a simple leak, use Seals All. It gels up and seals permanently.
Larry
Elder User
Joined: Jun 2003
Posts: 724
Likes: 2
From: Ventura CA
Gas Tank!
Try this: sales@nwmp.com
They make retrofit tanks for trucks. They're kinda pricy but they have every kink of tank for the truck. The general feeling I got from other threads was the stock tanks are OK.
They make retrofit tanks for trucks. They're kinda pricy but they have every kink of tank for the truck. The general feeling I got from other threads was the stock tanks are OK.
Freshman User
Joined: Jul 2003
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From: Columbia Station, OH
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Post Fiend
Joined: Jun 2003
Posts: 8,209
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From: Black Hills of SD
Gas Tank!
I always thought all the crossmembers and hardware from a late 70s rear tank, the filler pieces from the auxillery 67-72 tank and a large Bronco tank would be a combo that should work with out too much hassle. Anyone out there tried this? How do you tell a Ford tank from a chevy. I found one 31x31x12 in the junkyard but I cant really tell what it is from. (well I didn't really spend much time looking at it either)
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Thread Starter
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Freshman User
Joined: Jun 2003
Posts: 30
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From: Albuquerque, NM
Gas Tank!
well me leak developed when i bought a new gas cap for my truck and now the tank builds up a lot of pressure. the leak that i have is just a small drip so i guess i can try to find seals if you say it works so well., THANKS
Senior User
Joined: Nov 2002
Posts: 315
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From: Clayton CA
Gas Tank!
Sounds like your gas cap isn't venting properly. Check to make sure that you bought a vented cap. However, I've had trouble with the new Stant caps that are supposedly vented so there's no guarantee....
Posting Guru
Joined: Mar 2003
Posts: 1,622
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From: nevada
Gas Tank!
recently i removed in cab and both aux tanks from my 72. Installed an in bed fuel/tool in truck. It sits flush with top of bed rail, keeps my tools under lock and key, and holds 55 gal of fuel. If you install sending gauge in it before gassing up, drill holes on opposite side of fuel fittings end and watch for baffles. 500+m between gas stations!
Elder User
Joined: Apr 2003
Posts: 779
Likes: 9
From: Tumwater, Wa
Gas Tank!
Originally posted by BB
The new Stant caps vent one way only, going in so the tank don't collapse. On a hot day you'll find out where all your leaks are.
Barry
The new Stant caps vent one way only, going in so the tank don't collapse. On a hot day you'll find out where all your leaks are.
Barry
Senior User
Joined: Mar 2003
Posts: 183
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From: Utah
Gas Tank!
what do you guys think about building my own gas tank. Something that would fit all the way across the bed in the front. would it be worth my time or would baffles etc. become too much of a pain to build?
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
Gas Tank!
If you have the skills it should be no problem at all. I say go for it. But why don't you build one to go between the frame rails in back? It shouldn't cost that much to have a sheet metal shop sheer and bend the pieces. I think you can even get the piece for the sending unit to fit into. Shouldn't be a problem to make a 40 gallon one.
I have used the tank in the bed before and will add this bit of advice, if you haul anything at all, ever, think what could happen with an engine block in the rear and someone runs a red in front of you, you slam on the brakes, the engine block tries to stay in motion while the truck is stopping and WHAMO!!!. It could make for a great pyrotechnic display if it punctures the tank. Fortunately mine didn't blow when it happened.
I have used the tank in the bed before and will add this bit of advice, if you haul anything at all, ever, think what could happen with an engine block in the rear and someone runs a red in front of you, you slam on the brakes, the engine block tries to stay in motion while the truck is stopping and WHAMO!!!. It could make for a great pyrotechnic display if it punctures the tank. Fortunately mine didn't blow when it happened.