I wanted to see if anybody has heard of, or done, this mod to their gas tank. Researched it a little, and seems easy enough...
One of the plastic nipples on the top of my 19 gallon gas tank cracked, and was causing an evap leak. Had to fix it for inspection. I had a used one swapped in, which ended up being a 15 gallon tank. Not a huge deal, but its like losing 25% of your fuel capacity. So i'd like to get that back.
Apparently the 15 and 19 gallon tanks are two different part numbers, but are basically identical, same size, shape. The only difference is that the vent tube is longer on the 15 gallon, and is hanging inside the tank. It sounds like, as the fuel level rises in the tank, it reaches the vent tube, causing a pressure difference, and that is what causes the gas nozzle to shut off when filling your tank. So, the MOD is to drop the tank, remove the fuel pump assembly, and cut several inches off the vent tube. This will allow the fuel level to be able to rise further.
So if it's true, and it seems like it is from other forums, anybody with a 15 gallon tank can easily bump up their fuel capacity 4 more gallons. I guess you would just need a 19 gallon fuel pump assembly. I already have that. I know I could just go find another tank that is 19 gallons, but that will cost me a couple hundred i'm sure. Has anybody done this? or tried?
http://www.jeepforum.com/forum…nk-mod-confirmed-1234621/
Anyway, thanks for any insight.