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  #1  
Old 04-23-2007, 05:19 PM
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Rainman Rainman is offline
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Installing a f150 rear tank in a waggy

I picked up a f150 rear tank to use as an aux tank in my waggy. It's out of an 83.



I need to install a nipple for a return line (upgrading to fuel injection) and install a vent line for the filler tube. What would be the easiest way to do these.

I also would like to know what the resistance range for the sender is and wheather or not it's more or less compatible with the guage in the jeep. I've spent lots of time searching for this and could find a solid answer.

Any help would be appreciated.
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Old 04-23-2007, 06:55 PM
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Can't help you with the ohm readings...I went with a custom dash and used SW guages.

As for a nipple/filler question, a good muffler shop can build one for you.

83 was probably the last of the carbed engines, I know the tank I bought was for a 93 F150 and it had the return line on the sender/pick-up/pump. You may be able to find one of those or purchase new (beware of the sticker shock...it's expensive) that would drop right into the same hole.

Some pics in my signature

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Old 04-24-2007, 05:00 PM
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I took a wire wheel to the tank to get all the crap off the outside. Looks nice and shiney now.

Apparently the vent filler hose goes inside the filler hose. Not exactly sure how I'm going to adapt that to my plan to use a second G-wag filler section. Might need to fabricate the fill pipe so the vent is inside the hose. The return nipple should be easy enough to weld to the tank (or the sending unit)


According to some ford truck forum (I forgot which) the sender opperates on a 160 full, 15 empty. According to my Haynes for the G-wag, the stock sender is 110 full and 1 empty. Didn't these invert at some point (with the dash change in 86?) If these numbers are true, I suppose I can use the factory guage and it will give me approximate fuel level for the aux tank. Right?
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Old 04-25-2007, 11:28 AM
yankeedog yankeedog is offline
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the sending unit in the ford will work but not be very accurate.you will probably read full for a longer period of time. and empty will be about 1/8 tank as indicated on the jeep gas guage.
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Old 04-25-2007, 09:20 PM
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Question

How many gallons does this F150 tank hold ??

Have you been taking pics of your progress ??


.
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  #6  
Old 04-25-2007, 11:54 PM
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19 gallons.

I plan to take some pics as I install it. I need to figure out how the filler will work first.
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Old 04-26-2007, 03:27 PM
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"Modified" the tank to fit. I had to pound the lips on the side down to make it fit between the frame rails. Pounded a little to hard on the passenger side . Wouldn't fit without taking the hitch off but it should be able to go back on after the tank is in. Need to get the new filler/vent pipes welded on and figure out the best way to secure it, among other things. Also, I need to do something about the exhaust.

Pics: http://s145.photobucket.com/albums/r..._Wag/aux_tank/
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  #8  
Old 04-26-2007, 03:51 PM
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Nice! How'd you route the fuel lines?, Did you reuse the spare tire brace?
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  #9  
Old 04-26-2007, 03:52 PM
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are these f150 tanks baffled for fuel injection?

i have only measured but the tank i have from an 87 suburban should fit tight between the framerails (turned 90*), and it just might fit into the channel of the crossmember but worst case the crossmember can be moved forward a bit. the tank has got to be close to 40 gallons though. i just have to find someplace to empty it (its 3/4 full!) and i can test fit it a little easier. i'm not sure how far it will hang down though, we'll cross that bridge when i get to it.

Al
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  #10  
Old 04-26-2007, 04:26 PM
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Hey Rainman, the numbers I found on that tank are 34 3/4" X 27" X 8" deep. Are those in the ballpark? It also looks like the tank is wider than it is long?
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  #11  
Old 04-26-2007, 04:46 PM
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Quote:
Originally Posted by grand_wag_85
Nice! How'd you route the fuel lines?, Did you reuse the spare tire brace?

Haven't gotten to plumbing yet. Didn't think the tire brace would work since the tank is shorter at the rear. I might look into using it though.


Quote:
Originally Posted by AlsChopShop
are these f150 tanks baffled for fuel injection?

This one isn't but I think later model years should be.


Quote:
Originally Posted by JeepinPete
Hey Rainman, the numbers I found on that tank are 34 3/4" X 27" X 8" deep. Are those in the ballpark? It also looks like the tank is wider than it is long?

Yes, its wider than it is long. After I pounded the side lips down, it's 33" x 27" and depth tapers from 6" in the rear to 8 1/2" at the front.
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Old 04-26-2007, 08:45 PM
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Quote:
Originally Posted by AlsChopShop
are these f150 tanks baffled for fuel injection?

i have only measured but the tank i have from an 87 suburban should fit tight between the framerails (turned 90*), and it just might fit into the channel of the crossmember but worst case the crossmember can be moved forward a bit. the tank has got to be close to 40 gallons though. i just have to find someplace to empty it (its 3/4 full!) and i can test fit it a little easier. i'm not sure how far it will hang down though, we'll cross that bridge when i get to it.

Al

40 GALLONS Now thats what I am talking about! The biggest aux tank that I have heard of being installed in an FSJ was a 33 gallon tank, in Riverbeast.

AL .... is this Suburban tank baffled for FI? And which crossmember are you referring to? Got pics??

Thanks
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  #13  
Old 04-28-2007, 12:08 AM
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Change of plans (for now)

I picked up one of the trailblazer units at the U-pull-it today. Going to see how that works. Needs a cleaning, hot tanking, and some small patches. Based on the smell from the tank, I don't think there's been gas in it for at least 5 years.
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  #14  
Old 04-28-2007, 08:47 AM
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Could you tell me on the info you know about these f-150 tanks and the sending unit/fuel pump in them?
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  #15  
Old 04-28-2007, 02:02 PM
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Quote:
Originally Posted by Rainman
The return nipple should be easy enough to weld to the tank (or the sending unit)

Weld... to a used gas tank?? Ermm... If not already mentioned, I don't think that's a great idea...

Michael
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  #16  
Old 04-28-2007, 03:34 PM
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Quote:
Originally Posted by JeepNOFEAR
Could you tell me on the info you know about these f-150 tanks and the sending unit/fuel pump in them?

the 83 tank I picked up is setup for a carb with no return. 84 is the same for the carb trucks but FI was also an option-different sender (tank may or may not be the same, external pump I think). 86 & 87 use the same sender as the FI 84s. 87-89 used a different sender (intank pump?) and 90-96 have intake pumps (pretty sure).

All the tanks roughly measure about 34 x 27 x 8. They should fit without modification in a J-truck due to the wider frame spacing (they are wider, right?) With the lip pounded/folded the tank fits with little space to spare. there are a few people on the board who have installed them before.


Quote:
Originally Posted by shimniok
Weld... to a used gas tank?? Ermm... If not already mentioned, I don't think that's a great idea...

I wasn't going to do it myself (haven't learned to weld yet, might start this summer) and if proper methods are followed, it's safe. Google "gas tank welding" and you'll find plenty of info.
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  #17  
Old 04-28-2007, 05:53 PM
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You may want to take a look on ebay for a new tank, and use the pick & pull tanks for a mockup. The ford tank can be had for $50 new on ebay for example. By the time you pay someone to fix up your tank, I would think you would be money ahead to buy a new one...
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  #18  
Old 04-28-2007, 09:06 PM
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Quote:
Originally Posted by Tigger4X
40 GALLONS Now thats what I am talking about! The biggest aux tank that I have heard of being installed in an FSJ was a 33 gallon tank, in Riverbeast.

AL .... is this Suburban tank baffled for FI? And which crossmember are you referring to? Got pics??

Thanks
it wont be aun aux tank though, it will be the main tank because i think i will have to remote the saddle tank when i change out drivetrains because the rear d-shaft will no longer be offset.

yes, the burban tank is baffled for FI, it came off the '87 was the start of fuel injection (tbi) on the trucks. i've only held a tape to it so i can't be sure it will fit... but once i get rid of all 30 gallons of bad gas in it i will be able to check for sure. the crossemenber i'm talking about is the one that the shocks mount too. actually come to think of it it might be round, not C channel.

a skid plate might be in order if it hangs too low. dunno.


**anyone know how do dispose of bad gas?

Al
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Last edited by AlsChopShop : 04-28-2007 at 09:08 PM.
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Old 04-28-2007, 09:34 PM
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30 gallons you say huh? Can you say bonfire?! LOL

I've used bad gas as weed killer and such, but 30 gallons is a bit much.

How bad do you think the gas is? Maybe you could mix it with good gas and burn it in your car, lawnmower, etc. It may take longer than you would like but it would get rid of it, especially with gas being so dad burn exspensive.


As far as your tank goes I would be using it as a main tank too. I have 3" of body lift so I can hide some of it up high but a skid plate would be wise for sure. Thanks for keeping us up to date.
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  #20  
Old 04-29-2007, 09:27 AM
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My neighbor has F150's and he said that there is a special locking collar on the sender/pump assembly that requires a special tool. It looks like you could just pound on it with a screwdriver/hammer, but the manual says specifically NOT to do that. Just an FYI.

I've thought about those tanks too, esp. since he's got so many trucks around, he's bound to have a spare tank that I could borrow to see if it fits.
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