72 Vapor Canister

[Michael W.]

Re: 72 Vapor Canister

That filter at the base of the canister is still available - made of a material similar to foam. It is the contents of the canister that i am interested in replacing. The canister is original and the car has been idle for 25 years. I can't imagine that the 40 year old material on the inside is still functional.

Mine will be 40 years old this July. It still works as per design. I bet yours does too.

[Edward J.]

Re: 72 Vapor Canister

Terry yes there is a filter under the plastic cap on the bottom.

[Christopher K.]

Re: 72 Vapor Canister

Here's a link that might be useful for your rebuild. Not exactly the same but very helpful.

http://jeep.smallcraft.net/completed_projects/canister/

[John W.]

Re: 72 Vapor Canister

Great article -thanks

[Paul O.]

Re: 72 Vapor Canister

Yes there was the yellow tinted filter under the removable cap at the bottom that was replaceable but the charcoal was not a service item as other have stated. The cap also had a built in drain tube and a rubber hose. The charcoal was used to trap fuel vapor from the fuel tank the bottom filter was used to remove particles from the air. This would occur only when the engine was operating the incoming air would flow over the charcoal remove the fuel vapors then flow to the carburetor base and be burn in the engine. I think I remember an article I read a while back someone cut the canister at the bottom removed the charcoal and replaced it with charcoal he found at a pet fish supply store. He then glued the canister with an epoxy. I would not think the charcoal would ever wear out.

Also raw fuel in the vapor line would indicates the check valve at the fuel tank has failed.

[John W.]

Re: 72 Vapor Canister

Good point. I will clean it up - replace the filter at the bottom, place it back into service.

[Terry M.]

Re: 72 Vapor Canister

Yes there was the yellow tinted filter under the removable cap at the bottom that was replaceable but the charcoal was not a service item as other have stated. The cap also had a built in drain tube and a rubber hose. The charcoal was used to trap fuel vapor from the fuel tank the bottom filter was used to remove particles from the air. This would occur only when the engine was operating the incoming air would flow over the charcoal remove the fuel vapors then flow to the carburetor base and be burn in the engine. I think I remember an article I read a while back someone cut the canister at the bottom removed the charcoal and replaced it with charcoal he found at a pet fish supply store. He then glued the canister with an epoxy. I would not think the charcoal would ever wear out.

Also raw fuel in the vapor line would indicates the check valve at the fuel tank has failed.

Those yellow filters used to (and may still) be commonly available at your FLAPS. I am sure there is both a GM & Delco short number for them, but then again time has moved on. I think I can bet on who has that answer.

Raw fuel in the canister is also alleged (mostly by the EPA) to come from over filling the fuel tank. Perhaps I shouldn't speak so soon, but i have filled my fuel tanks to the vary top for years and never had an issue. I am ready for all of you who will tell me how lucky I am (yes, I play the lottery) and the sky is falling.

[Joe L.]

Re: 72 Vapor Canister

Those yellow filters used to (and may still) be commonly available at your FLAPS. I am sure there is both a GM & Delco short number for them, but then again time has moved on. I think I can bet on who has that answer.

Raw fuel in the canister is also alleged (mostly by the EPA) to come from over filling the fuel tank. Perhaps I shouldn't speak so soon, but i have filled my fuel tanks to the vary top for years and never had an issue. I am ready for all of you who will tell me how lucky I am (yes, I play the lottery) and the sky is falling.

Terry------


The filter is GM #7026014, aka Delco A478C.