Jeep Wrangler 20-Gallon Gas Tank Conversion

From 1991-1995, Chrysler offered two different sizedthere TIGHT. In fact, removing this tube was the
gas tanks for the Jeep Wrangler: 15-gallon andhardest task on this project. Some people removed
20-gallon. In reality, these two tanks were notthis tube in sections by pulling out 3", then cutting it
different in size at all. The difference in some was aoff, and pulling another 3" until the tube was
small plastic vent hose that extended down into thecompletely removed.
tank which prevented more than 15 gallons of fuel5. Cut a 2.5" section from the liner tube.
being filled into them. By shortening this hose, theThe fuel vent neck on the tank must have a section
tank can hold the 20 gallons of fuel it was originallyof the liner tube pressed back inside to maintain
made to carry. The entire conversion process ispressure applied when tightening the hose clamp
about a 60-90 minute job.(during re-assembly). I have no idea why this is, but
since someone advised to do so, I didn't argue. Cut a
1. Raise the vehicle on jack stands.2.25"-2.5" section and fit it back into the fill vent neck.
2. Remove the plastic panel in the rear right cornerYou'll need a hammer or something heavy to pound it
near the gas filler.in. Make sure not to use a metal hammer should you
This is held in place by four plastic rivets. Remove thebe unlucky enough to strike something that causes
rivets by securing the outer portion in place whilesparks this close to the gas tank.
prying the center outward 0.25"-0.5" with a small6. Reassemble everything in the reverse order.
screwdriver. The rivets will remove as whole pieces.Use the hose clamp to attach the fill vent hose to
Don't damage them because you'll need them forthe fill vent neck, four rivets to reattach the plastic
reassembly.cover on the rear panel, and five lug nuts to mount
3. Disconnect the fill vent hose from the tank.the removed wheel.
This is done by removing the hose clamp and pullingUnless you've installed a sending unit for a 20-gallon
the hose off the fill vent neck. You may need to prytank, the fuel gauge in the dashboard will be
it, but it's only held on with a hose clamp.inaccurate. Others who have done this conversion
4. Remove the inner plastic fuel vent neck liner.claimed the gauge won't begin to show movement
Inside the neck of the fuel vent hose, you can see auntil there is 15 gallons in the tank. This was not the
tube which lines the inside. This liner tube is made ofcase for me. My gauge doesn't show movement until
hard plastic. Itýs about 9.75" long and reaches10-12 gallons remain in the tank and when the gauge
about 7" into the tank. Gas can not be filled beyondreads 1/2, the tank is near empty. It used to be
the bottom of this tube. Shortening it will increaseempty when the gauge read 1/4, but I ran the tank
the volume of gas that will fit into the tank. Tonear dry just to make certain and it is empty at the
remove it, you will need to pry it away from the1/2 mark. I don't know if the sending arm got bent
sides with a small screwdriver and grab it with anyby this or what went wrong, but it's now empty at 1
small tool that offers a STRONG grip. I recommend a2.
needle-nose vise grip because this tube is crammed in