Gas Tank Modification Question -
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post #1 of 7 Old 04-22-2004, 06:21 PM Thread Starter
Six Shooter
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Gas Tank Modification Question

I'm in the middle of doing the vent tube modification so I can get more gas in the tank. The instructions I'm following where posted by a Jeff Yokomura. What I need to confirm is if I need to remove the vent tube hose entirely? I have the vent tube hose free from the filler neck and do not see a vent tube. The hose clamp at the other end is going to be a bear to get to if it does need to be loosened and removed. Just a confirmation needed before proceeding.

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post #2 of 7 Old 04-22-2004, 06:53 PM
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Yes, you need to remove the vent hose from the gas tank.
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post #3 of 7 Old 04-22-2004, 07:44 PM
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what year is your jeep?
it is a real ***** to get at that vent tube... but it is worth the extra capacity.


What is all of this talk of Savvily designed products?
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post #4 of 7 Old 04-23-2004, 04:14 AM
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Yes, you need to remove the vent tube to find the plastic tube that's inside the tank. The vent tube goes on the outside of the tank nozzle, and the plastic tube is on the inside of the same nozzle.

BTW, don't mean to discourage you, but I did the whole thing, finally managed to pull out that inner plastic tube with long-nose pliars, bit by bit, slowly slowly, when it just popped out after two inches! It was only two inches long!!!

Now, the cut was factory-made, perfect, so I doubt the previous owners did the modification - I think that my truck, a 93 Renegade for export, was just given a 15 gallon tank. The back lights have 1989 stamped into them.

Or maybe someone has another take on this?
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post #5 of 7 Old 04-23-2004, 06:27 AM Thread Starter
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Thanks for the responses. It only made sense that the tube needed to come out entirely, but the instructions where not very clear on this. The Jeep is a 95, which according to same instructions, qualifies for this modification. Getting to the tank end of that vent tube is going to be a real challenge. I have fairly long fingers so perhaps that will be a plus. Ironically, I've been contemplating purchase of a motorcycle, and fuel capacity on a bike has become an issue for me because of owning this Jeep. I hate having to stop so often. I found one I like, but the owner says 150 - 160 miles and you better be near a refeuling spot. Thanks again for the confirmations.
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post #6 of 7 Old 04-23-2004, 07:43 AM
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Good luck with getting to that clamp. I got so fed up with trying to get to it, I ended up drilling a hole through the floorboard up above it. That saved me. If you or anyone does go this route, just be very careful. As you know, it is a gas tank.

After removing the hose clamp on the vent hose, I was able to pull the vent tube out but it took some pulling. Some recommend to cut it down to size, I chose to leave it out.

While I was down there I changed the fuel filter too.

I went from 200 miles per 15 gallon 340 miles per 20 gallon tank. I shoulda changed that filter a long time ago!

95 YJ 4 banger 5 speed
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post #7 of 7 Old 04-23-2004, 09:55 AM
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Six Shooter,

Here's a thread I started on this subject:

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