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Weird fuel tank question

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Old Mar 10, 2015 | 04:10 AM
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Weird fuel tank question

Gents, I just took my old fuel tank out to fit up a new Autometer sending unit into the thing (to match my new fuel gauge) and I haven't really got that far yet (so I dont know whether it will be a direct bolt up- probably not - or whether I need an adapter if there is such a thing, but, that is not really the question though feel free to answer it...
The question is: on the top of the tank I have discovered two screw looking things which appear to be a touch moist with fuel. I am assuming that is some kind of pressure release thing?
Anyone confirm it for me?
Ta guys.
Oh, yeah, the steel hard line which goes to the brass fitting on the tank broke right near the brass fitting....Jeez, fun fun fun!
 
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Old Mar 10, 2015 | 04:26 AM
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I'm guessing I will need midfifty's adapter plate Part #:1605-ADPT
 
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Old Mar 10, 2015 | 08:01 AM
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Do you have a picture of the top of the tank? There shouldn't be anything on the top except the sending unit. (Assuming original type '53-'55 tank)

Sometimes the old-timers would repair a pin-hole leak with a screw. Would it be something like that?
 
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Old Mar 10, 2015 | 02:43 PM
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Yes, that is the one. They certainly look like screws up top. I'll clean the old thing up and see what I have got and get a photo of it up here. If there are holes that have been patched up, it might be time for a new tank.
 
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Old Mar 11, 2015 | 05:49 AM
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Here are the two screw. Almost looks like they were deliberately put there, which confused me, as it looked too uniform to be random rust holes???




F100 fuel tank with two mysterious screws, uniformly placed...for what reason?





Close up view. Almost looks as if they were deliberately drilled in there?
 
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Old Mar 11, 2015 | 06:34 AM
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Does this look original to you guys?

 
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Old Mar 11, 2015 | 06:48 AM
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The only thing I can think of is that's where the rear baffle is. Maybe the spot welds failed, or were missed from the factory, so the screws were added to hold it in place.
 
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Old Mar 11, 2015 | 07:17 AM
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That's probably what it is, Ken. It looks too intentional to be random pin hole fillers.
 
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Old Mar 11, 2015 | 05:53 PM
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I'd wonder if they were Drilled through by accident and the screws were a quick fix.
 
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Old Mar 11, 2015 | 06:14 PM
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Originally Posted by bjmayberry2
I'd wonder if they were Drilled through by accident and the screws were a quick fix.
Interesting thought. Are there corresponding holes in the floor panel?
 
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Old Mar 11, 2015 | 06:48 PM
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Now you've got me I'll get under there and see if there are two holes in the floor of the cabin.
Let you know! (At work until late tonight, so won't be able to tell for about ten hours)
Wouldn't that have ruined your day if that's what's happened! Heheh...
I'll get back to you on that one!
 
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Old Mar 11, 2015 | 08:11 PM
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Originally Posted by Bluey Zedoff
Does this look original to you guys?

To answer your question, it doesn't look original compared to mine. It looks almost like an after-market sending unit riveted to an adapter. An older replacement maybe?
Edit: Was your truck built in Australia? Ford Australia may have used different suppliers and your sending unit may be original for your side of the planet.

Here is a picture of my original sending unit (still works) and the adapter ring for an after-market unit.
 
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Old Mar 12, 2015 | 12:28 PM
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Originally Posted by EffieTrucker
To answer your question, it doesn't look original compared to mine. It looks almost like an after-market sending unit riveted to an adapter. An older replacement maybe?
Edit: Was your truck built in Australia? Ford Australia may have used different suppliers and your sending unit may be original for your side of the planet.

Here is a picture of my original sending unit (still works) and the adapter ring for an after-market unit.
I have a new steel tank is there any reason to treat the inside with anything to prevent rust? or just install it and don't worry about it? Thanks
 
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Old Mar 12, 2015 | 12:40 PM
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Originally Posted by Bluey Zedoff
Now you've got me I'll get under there and see if there are two holes in the floor of the cabin.
Let you know! (At work until late tonight, so won't be able to tell for about ten hours)
Wouldn't that have ruined your day if that's what's happened! Heheh...
I'll get back to you on that one!
Wouldn't be the first time someone drilled though the floor into a fuel tank. Don't ask
 
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Old Mar 12, 2015 | 12:44 PM
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Originally Posted by cruiser456
I have a new steel tank is there any reason to treat the inside with anything to prevent rust? or just install it and don't worry about it? Thanks
Lots of argument about that because of alcohol being added to fuel these days. I bought a brand new snow blower last season but didn't remove the fuel after the season was over. This year I tried to start it and nothing. Took it to the shop and it had eaten the gaskets and etched part of the carburator. They said avoid any alcohol fuel it at all possible.

If you do line it make sure you use something that tolerates alcohol!!
 
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