15 to 20 gallon Gas Tank Modification - Page 2 - Jeep Wrangler Forum

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Old 04-04-2016, 09:33 AM   #31
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Ok, about to claw out my eyes. Seems most of the front bolts are stipped at the head on top of the tank. FML! Any suggestions on how to get them out? No body or anything so it is tight up there.
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Old 04-04-2016, 11:57 AM   #32
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Why hasn't this thread been stickied yet? Shouldn't it be?

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Let me tell you about Time Machine: 95 YJ Rio Grande Edition l4 2.5l on 31s stock height springs from GS, Warrior Products .5" shackle lift, Softopper tan soft top, daystar 1" body lift, Spartan locked D30, open D35 with 4.10 gearing
"Time to bust out the honky-tonk attitude"
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Old 04-08-2016, 10:15 AM   #33
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I agree, it should be a stickie.

I did this to my 91 a couple weeks ago. On my first fill-up, I got 17.5 gallons in. That was right after I did the mod, so there must've been about 2.5 gallons still in the tank before hand. I had 308 miles on the second tank and put in 20.01 gallons with the gauge telling me I was at 1/8th of a tank. So I'm guessing that either the gauge is way off and I was running on fumes, or the tank holds more than 20 gallons now.

Thanks to the original poster for posting this mod. I really hated filling up so often.

Bill
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Old 04-08-2016, 10:23 AM   #34
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I have an 89 with a 20 gallon fiber glass, square hole for the sending unit (just replaced it). Are all 20 gallon tanks fiber glass, is that a way to tell prior to 91?
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Old 01-19-2017, 12:34 PM   #35
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Thanks for your write up... I found out the hard way however that jeep didn't start with the 15/20 tank until 1991. My YJ is a 90' and it's 15 gallon tank is a true 15 gallon. I found this out when I ordered a replacement tank for it and it wasn't even close to fitting. A new skids plate, vent hose, filler hose, and straps were called for. But it was worth it. I got rid of my steel tank and I upgraded myself by 5 gallons.
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Old 02-04-2017, 06:57 PM   #36
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I did this to my '95 YJ today, but it only took me about 1/2 hour. I was able to get to the vent tube from underneath. It took a little persuasion, but I was able to get the tube out. What a joy it is to fill up my tank in 5 minutes instead of 20 minutes.

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