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Old 09-05-2009, 12:16 PM   #1
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Replacing the 15 gallon gas tank

The '98 TJ's have a 15 or 16 gallon tank....does anyone know if the newer 19 gallon TJ tanks can be fitted in place of the 15 gallon tank reasonably easy?

thanks
Bill J.

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Old 09-05-2009, 09:16 PM   #2
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google jeep 20 gallon mod ive seen a lot of threads that state the tank is the same you just need to change the filler tube here are a few links Wrangler YJ Gas Tank Modification 15 to 20 Gallons Jeep Wrangler 20-gallon Gas Tank Conversion

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Old 09-05-2009, 09:21 PM   #3
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Quote:
Originally Posted by u.p.jeeper View Post
google jeep 20 gallon mod ive seen a lot of threads that state the tank is the same you just need to change the filler tube here are a few links Wrangler YJ Gas Tank Modification 15 to 20 Gallons Jeep Wrangler 20-gallon Gas Tank Conversion
Our filler neck doesn't look like that, at least not on the 98's. I checked it out when I had my tank dropped and it didn't have a long filler neck like the YJ's in those links. Mine was close to the top of the tank and just had a simple bobber that would close the hole when it was full.



Doesn't have that on the inside of our 15 gal tank.
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Old 09-05-2009, 11:40 PM   #4
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I thought in the early TJ it could still be done but the tube was molded to the tank. IIRC you can still do it but you have to drop it and go through the fuel pump hole to cut it.


Edit: here's the link..... http://www.gottrail.com/TJ/TJfueltankconversion.html
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Old 09-06-2009, 12:07 AM   #5
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I thought in the early TJ it could still be done but the tube was molded to the tank. IIRC you can still do it but you have to drop it and go through the fuel pump hole to cut it.


Edit: here's the link..... Got Trail? Rob's (AKA seRob) Jeep site

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Quote:
Now, I'm sure you're wondering about the little ball valve on the end of the larger filler tube that you just cut off. As far as I know it's only purpose is to float up & cause enough back pressure to make the pump at the service station kick off after filling the tank to 15 gallons. IT IS NOT THE ROLLOVER VALVE, as some may believe. In the photo to the right, My Jeep was almost completely on it's side. I had a full tank, and not one drop spilled.
Good enough for me then. I thought it was for that but if it's not I wish I had cut it off and got the larger fuel pump while I was replacing it.
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Old 09-06-2009, 12:13 AM   #6
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Mhm?
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Old 09-06-2009, 12:24 AM   #7
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Sounds like a future project to me!
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Old 09-06-2009, 02:58 AM   #8
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Mhm?

I was quoting what is said about the bobber in the link you post. I thought it was so it wouldn't spill out but I was wrong. I'll do this mod when I get a new skid for the tank. I just don't want to have to drop it again and mess with the fuel pump all over again.
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Old 09-06-2009, 10:47 AM   #9
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Thanks for the info gentlemen ...you guys are all over it.. as always!

Bill J.

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