Need help finding parts - 74 CJ5

Hey folks, I'm working on a complete frame-off restore of my Jeep.

Thus far there are just a few things that I'm not able to find.

1) My Jeep has two fuel tanks, 1 under the driver seat and another in the back below the body. Every catalog/website that I look at has the rear tank, but none make a reference to the under the seat tank.

Would the 55-67 under the seat tank work and be the correct fit?

2) Fuel vapor canister that's found behind the rear-driver side fender. Is this something that needs to be serviced/replaced? I can find the foam pad, but as far as I can tell nothing else.

Appreciate the help!

 

It sounds like someone added the older style tank to supplement the factory rear tank. Its not original but it is a somewhat common jeeper's mod.

The vapor canister only needs the bottom filter pad changed.
As long as the canister is still full of charcoal, it should be good to go.
One hose going to the tank and one hose going to the air cleaner.

 

Thanks for the quick reply DREDnot!

The fuel tank must've been a dealer option / modification. My grandfather bought it brand new and I can see him adding that kind of feature.

The canister is indeed still full.

 

The under-seat fuel tank has to be an owner modification. The under-seat tank does not have a provision for vapor recovery, so it's not something a dealership could normally do. And it was not available from the factory.

It was a fairly common addition in the day though ... a straightforward installation. I added one to my '73 CJ-5 back in '73.

You should have a vapor canister under the hood, and a fuel check valve under the rear fender. The '74 TSM is online http://oljeep.com/gw/74_tsm/4A-EmissionControl.pdf - look at page 4A-17.

The vapor recovery system is trouble-free and needs little maintenance. Connect is as the manual shows, and it should function fine. The check valve is actually more problematic than the canister - the canister is a commodity item that can be replaced from junkyard sources or by modifying a more modern part.

You'll find that parts support is not very good for the CJ intermediate ('72-75) years. Used parts will be your only option for many items.

 

Many thanks Timgr! I love this stuff! My grandfather bought this jeep brand new, drove it for 2 years then parked it. I pulled it out of the barn in '93 and it only had 18k miles on it at the time. He spared no expense on features, which is why I assumed that it was a DIO.

Thanks for the TSM links too! They'll be incredibly handy.

 

...not wanting to derail this thread, but you have GOT to love any tech service manual that has as an actual instruction statement of, "Bend a stiff clothes hanger or welding rod as shown in figure 2-12."

 

Yeah, the Jeep TSMs are usually very helpful. And they do not ask you to have hundreds of expensive special tools. However, these are meant to be read by mechanics, and they do expect a fairly advanced level of automotive understanding. They also won't tell you how to do stuff that is obvious but tedious or difficult - no hand holding!