It's that time again.....

Well,
I haven't been on here for about a week (thanks to starting a new job!) but I plan to work on the ol' '63 CJ5 this weekend. I bought some parts last week, and now i have a question. On the bottom of the fuel tank there are two threaded outlet fittings, one is larger than the other. My question is, which one is the line and which one is the breather? My guess is that the larger one is the breather and the smaller one is the line- but i wanted to ask the experts!

thanks,
Josh
Semper Fi

 

No takers on this one? lol

 

IIRC, one of the holes is a drain, regular pipe threads.
The other has a flair type seat in it for the gas line.

 

cool deal. thanks for the info...

 

What Uncamonkey said.


Sent from my iPhone using Tapatalk

 

The typical tank has one outlet that is smaller than the other. The smaller opening is on a raised dimple, which when the tank is in place and the jeep is right side up, forms a small valley to trap sediment and rust. A pipe plug is usually placed in this opening. The larger opening is connected to a small pipe and filter screen inside of the tank. This assembly is soldered into the bottom of the tank. If you remove the fuel line from the larger opening, be sure to hold the outer fitting with a wrench or you will twist the entire assembly (break the solder) and have to resolder it in place. This is a delicate process, if the tank has had gas in it. Also a note about these old tanks. The insides of the tanks have a coating to prevent the tank from rusting. This lining falls off after many years of disuse, and can be a constant cause of plugged fuel line. My tank sat for 20 year dry. The liner looked like flakes to small leaves floating in the tank. A quick way to see if there is rust in the tank is to use a section of magnet (I used one from a refridgerator door gasket) and push it into the fill opening. The magnet will pick up particles of loose rust and let you know what you are up against. Today's fuels seem to release coating, making the problem worse.

My suggestion is to use a small plastic tank until you get the jeep up and running, and deal with the metal tank in a confident way. I should have taken this approach, I wish I had known all this when I did mine. I was fortunate, in that I never got farther than a mile from home when the fuel tank would plug, and I would have to walk back home and tow it back home with the towbar behind my bronco.

A lot of fuel pump problems are actually caused by poor flow and contamination in the tank.

I used a 5 gallon boat tank available at K-mart during my entire rebuild process. The real advantage of this is that you can easily remove the tank when doing welding on the body and frame. This makes for a much smaller fire ;-).

Good luck and have fun..

Chuck

 

Thanks for the info, guys! Well, I wasn't able to get as much done as I did last week, thanks to a late start and certain time constraints. I did however, get the fuel tank in and mounted along with the correct seat for a '63. Not as productive, but good enough for this weekend!