As the title says. I've got a 64 f100 with the 18 gallon in-cab fuel tank. I'm trying to pull it so that I can clean it and reseal it, but am struggling to remove it. It seemed like it should have been really straight forward, but I'm at a point now where I'm getting a little nervous to proceed because I dont want to break something.

I removed the 3 bolts across the top of the tank along with removing the filler hose and all other wires and outlets. In the manual, it appears as if there is another bolt on the bottom of the tank holding it down, but I cant find it (maybe the previous owner never reinstalled it??)

As of now, I can pivot the tank forward some, and I can lift up on the passenger side slightly, but driver side of the tank will not lift up at all. I'm also having interference with the solid part of the filler hose (part attached to the tank) hitting the inside of the cab when pivoting the tank forward.

What's the best way to proceed or am I missing a fastener somewhere? My best thoughts are to try to use a lever to slide the tank slightly towards the passenger side, then pivot it forward and attempt to pull it out. Just wasnt sure if there was a clip or something I needed to worry about breaking when attempting that.

On a last note, any recommendations for a good cleaning / sealing combo to use on the tank?

 

if I remember the bottom of the tank just sits in 3 sheet metal clips no fasteners they get rusted in pretty good I got mine out of my 64 took the fuel gage out and put a little soap in it and put a power washer in it filled it up and it looked like a sprinkling can got a new tank good luck

 

Just the three bolts at the top the bottom sits in a bracket that is part of the cab mount. The bottom bracket is rubber coated and the tank is most likely stuck to it. You should be able to pry it up and get it out. If it isn't rusted out lacquer thinner will remove the gum from unleaded gas and some phosphoric acid will dissolve any rust pretty well. If the galvanized coating is totally gone you would be better off with a new tank. I always put a gallon of thinner in them and slosh it around then let it sit for awhile slosh it an dump it, you will probably be appalled at what comes out of there.
You have to push the tank toward the driver side then pull the passenger side forward then lift it out. If you haven't already you do have to remove the seat.

 

Sometimes you can find a good one for sale, like this e.g.: https://vancouver.craigslist.org/rds...821645652.html

 

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As far as I know, there aren't any holes in the tank. It's just got a little rust and fuel that's been sitting in it for 30 years.

I didnt remove the seat, maybe that's what's holding me up. I'll try to pull the seat this evening and see what happens. Trying to pull it alone is making it a little more interesting too.

 

Trying to pull it alone is making it a little more interesting too.

 

Reproduced by Blue Oval Truck Parts, available from all the repro parts sellers.

D0TZ-9002-A (replaced 18 gallon C1TZ-9002-K) .. 19 1/2 Gallon In-Cab Fuel Tank / Reproduced

1961/66 F100/800, 1963/69 N/NT500/750, 1967/69 F800/1000, 1967/72 F100/750.

 

Buying a new tank was an option, I think the best price I found so far was around 180 or so if I remember right. I'm gonna pull the old tank first and see how bad it is, and then reevaluate and go from there. Hoping the original is decent enough cause that will be one less thing I'll need to repaint if i can reuse it. About to head out to the garage now and try to see if I can get it unstuck on the drivers side.

 

I managed to get the tank out but didnt end up needing to remove the seat. I used a pry bar and got the driver side unstuck and she came right out. Found 2 pinholes so I guess I'm just going to ahead and order a new tank. Thanks everyone

 

IMHO, If the tank is not real clean, sealant WILL NOT stick and you might end up doing it again, along with cleaning out all the garbage that was sucked up in the fuel lines and pump.
A new tank is a small price to pay. Trust me when I say, save yourself a lot of time and bad words.

 

Not sure if you saw my most recent post ( a few minutes before yours) but I found a couple small holes so I'm gonna just get a new one.

On a side note - Think I can reuse the old gas?? Looks good to me haha

 

Using that part number, some sites say it's a 18 gallon, 18.5 on another, and 19.5 on the final one. Which is the proper size to get? Or will any of the three fit properly?

 

I thought the 1967+ went to a 19.5 gal. Sorry, some of the other guys here will know what the #s are. I think one book said 18.5 and another one said 19.5.
I was empty once and I remember only getting maybe just under 19 gal in itand it started to overthrow. SOOOOOOIII.

By the way, that looks more like a cheap wine. I find that hard to believe that it's fuel.