leaky gas cap

[cj5grandnationalturbo]

I have a 56 CJ5 with a stock gas tank. When ever i get it up close to vertical the gas cap leaks. Any thing i can do about this.

 

[Cheepjeep85]

i hate to be captain obvious but, buy a new gas cap maybe. if im not mistaken newer fuel tanks and filler necks have a check valve in there. buy a new baffled gas tank, im out of ideas.

 

[cj5grandnationalturbo]

I realis that I could put in a nice fuel cell that is designed for being at high angles. I was just wondering if there might be someone that knows a trick or a different kind of gas cap that works better?

 

[jeepy]

Replace your gasket (make one if you have to).

Or as cheepjeep85 said before, get a new cap.

 

[Cheepjeep85]

A large check valve in the filler neck should do the trick, I don't know exactly where you could get one big enough. Grainger industrial supply maybe.

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[CJim7]

Switch to propane

 

[jeepy]

Don't forget, it probably should be a vented cap. Doesn't mean it should leak a lot, but you also can't totally block it off either. The vent in vented caps is basically only a pinhole.

 

[Cheepjeep85]

A pinhole drips, not pours, and a check vale would still let air in but no gasoline out.

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[escobar]

Get a sealed non breathing cap. Crawl under the jeep, find the small (about 1") line that comes off your main fill tube. You can cut it and install a "t" with a reduced size to come off of with about a 1/4" size breather line. Hit a small engine supply store or repair shop and buy an "end line filter" it plugs to the end of your new breathing line and blocks dirt easily (about $1). Run the new breather line to the highest point inside the body behind the tail light wall.

I've done this on all my restorations and allows me to use a spill proof cap without causing pressure problems in my tanks.

 

[Cheepjeep85]

Get a sealed non breathing cap. Crawl under the jeep, find the small (about 1") line that comes off your main fill tube. You can cut it and install a "t" with a reduced size to come off of with about a 1/4" size breather line. Hit a small engine supply store or repair shop and buy an "end line filter" it plugs to the end of your new breathing line and blocks dirt easily (about $1). Run the new breather line to the highest point inside the body behind the tail light wall.

I've done this on all my restorations and allows me to use a spill proof cap without causing pressure problems in my tanks.

i don't believe venting gas fumes inside the vehicle is a good idea, especially if you smoke, or have electrical issues like most cjs do.

 

[CJ]

He said to vent into the wheel well, not the passenger cabin...

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[Cheepjeep85]

ah, thought it said inside the tub behind the tail light panel, guess i misunderstood

 

[CJ]

ah, thought it said inside the tub behind the tail light panel, guess i misunderstood

I thought that first, then I thought about where the tail lights are mounted, by the wheel well...

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[escobar]

Yeah guys its outside.

Btw, these endcap filters are made from a ceramic type of material and absorb or dispense a very small amount of vapor or fuel at a time. So.......unless you plan on propping up your cj like the shuttle before takeoff for a few hrs-it should be right for you.

 

[cj5grandnationalturbo]

Thanks for all the good ideas. I think I'll go with the T idea. Thanks guys.

 

[Cheepjeep85]

Now that I think about it the tub is double walled in the back ain't it

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