extra fuel options

I am currently replacing the frame on my 65 cj5 and thinking about where I can stash an axillary fuel tank. We have the original under the driver's seat, but am thinking of where else I can place one. Not wanting to reinvent the wheel, so I'll ask has anyone done this? Google hasn't been my friend on this one, so I'm hoping someone here might have suggestions or point me to a website.

Thanks in advance

 

15 gal rear mount.

 

a second tank mounted under the pass side , remove tool box , move neck around, fill hole in tank ,cut hole in tub and weld new filler scoop in the body , we have done it twice............. or use the main underseat tank and add a 15 gal rear mount which means cutting out braces for towing in the area.

 

My 70 has the stock underseat tank, and a 15 gal rear tank from a 70-75 CJ5. As CJ5/442 said, you'll have to remove the 2 diagonal braces that are in this area. Also, if you're running the factory drawbar style hitch, you'll have to get one from the intermediate CJ (or modify the braces on your factory one). Other than that, it's an easy bolt in.

 

I always vote for a rear tank, the tool box is almost necessary. The braces in the rear are not and can be modified easily to match the factory 70-75 rear tank drawbar.

 

Under seat Tank will give you a good amount of fuel. Sorry I'm a sucker for a inside tank.

You can Put your tools along the Inside of the rear wheel wells using pouches/Magnets. Not only is this more organized but You can put more tools in them. They also roll up and roll out for placing the pouch on inside the hood or such instead of scratching up your fenders with bare tools.

There is tons of other places you can put a tool box. A inside tank is just one less thing to worry about when your driving through the woods having branches and such rubbing and scraping along the bottom of the body. Or such I don't know how you wheel.


I am guessing this(the link below) is a 20+ gallon tank. You could make it bigger if you wanted getting you closer to 30 gal and eliminating the need for a aux tank all together.

http://board.marlincrawler.com/index.php?topic=6472.480

I plan on doing this actually having the tank double as the seat mount/brackets.

It all depends on what you are going to use it for. You could always Keep the existing tank and have a secondary tank in the rear. Using the same fill tube you could fill both tanks(you need to put a divider in the fill tube). This would give a somewhat stock look as far as the fill tube goes.

 

I don't understand this statement at all, nobody and I repeat nobody with a rear tank worry's about rubbing anything on it. It is fully protected by the skid plate, frame and rear chunk. Mine is factory on a 71 and has zero dents or anything else in it after all these years of being wheeled by me and the previous redneck owner that jumped it on mulitple occasions. The fill neck is on the rear of the jeep where its suppose to be and there are zero smells in the cockpit from fuel, no leaks when it is off camber and very few guys with underseat tanks can claim this. Sorry I would still vote for a rear tank anyday over adding one to the toolbox area.

A question for the guys that suggest underseat tanks, have you ever wheeled a jeep with a rear tank?

 

I'm with Mike here - the rear tank is a much better design than the under-seat tank. I added an under-seat tank to my '73, and it was fine except for the fumes and leakage. I would not do it again... I might try some fancy aux tank under the seat with a transfer pump or something, but no filler by the door.

To me, if you have the under-seat tank and you need extra capacity, the rear tank seems like a no-brainer. The rear tank may slightly decrease your rear break-over angle, but other than that, I don't see any downside. The skid plate protects it just fine, and that area is wasted space anyway.

Back in the day, loss of the toolbox was one of the big disappointments for the '76 model year.

No one has linked to Mike Boyink's page yet? http://boyink.com/cj6/gas-tank-installing-rear/

 

I'm with Mike and Tim and will go one step further: I don't want ANY fuel tank inside the passenger compartment-if you can call it that on a Jeep. I am not much of a Ralph fan, but have to agree with him that under (or behind) seat tanks are a very definate safety concern. I can think of a lot more plesant ways to go other that being toasted by a gasoline fire. Fitting a rear tank is easy and as Tim notes, a no-brainer. Been using one of some type for better than 35 years and have yet to even put a serious dent in the skid plates-the diff/springs almost always get hung up before something gets to the tank.

 

OK you convinced me. The more I think about it the more I see the jeep with the doors off. And fumes running into the cab.
The fill being Directly above the Exhaust was always a concern with me. The gas tank overflows and the jeep burns to the ground--Not good. A added bonus is that This opens up the possibility to add seats with sliders for added passenger comfort.


You need to think about weight distribution/cg also. This is probably the biggest gain you will get with a rear tank outside of safety.

 

If the exhaust is routed right, it's supposed to come out at the opposite corner from the filler. I think this is the same on the newer Jeeps - a change in the side of the filler goes with a change in the side of the exhaust tip.

 

This is just my $0.02 and let me preface it with, I agree that the rear mounted tank is better than putting one under the seat. However, I'm adding a second tank under the passenger seat of my 1955 CJ5. Why? Bottom line is because it's mine and I want to. Here are a few of my reasons.

1. Inside the tool box area was all rotted out and I had to remove it anyways.
2. There was a big rust hole right where the new filler neck would go on the passenger side.
3. I have future plans for that "extra" area under the back where a new rear tank would go.
4. It's my grandfather's old CJ5 and I wanted to keep it (externally) looking the same with the under seat fill necks.
5. I was able to use new style highback seats with sliders and still keep the under seat tanks by making new seat mounts (which I would have had to make or purchase regardless of the tank type).
6. I can always go to a rear mounted tank in the future if I want to. Then the space under both seats would be extra room for something else.

Heck, maybe I'll add a rear tank as well and have three.

 

Just an idea is to mount two Jerry cans at the back of the jeep
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I've never liked that-2 5 gallon bombs just waiting for some fool to rear end you.

 

Yep, had those out there for 25 years and never felt very good about them-always thought of that WWII clip-the blazing MB. The 25 gal rear tank is one of the best things I have done-conveniency wise, it is the best-period.