Charcoal Canister?

-
moparblood

moparblood

Well-Known Member
Joined
Dec 24, 2014
Messages
251
Reaction score
61
Location
n.y.
i know it prevents vapors in air.
will removing it, improve, disprove anything?
mpg's up or down?
performance better or worse?
basically make any difference?
 
keep it, does nothing to hinder performance. Its all emissions related to gas fumes only.
 
Fuel bowl breather (out) and maybe vacuum line (in) to suck charcoal canister contents? Could look on carb and see where connections are.
 
Go to MyMopar and download the closest you can find there for a correct factory shop manual. The fuel/ carb section and the emissions section in the back of the manual explains the evap emissions. They vary year-to year with the hardware land how it is set up.
 
I think the gas tank is vented to it so if you remove you still need the line for a vent. If its not in the way just leave it alone.
 
The main problem with them is that as they get older and older, there is the chance the activated charcoal could be sucked into the innards of your carburetor (plugging things up) as the screen to prevent this disintegrates. That's why I spent a couple of hundred bucks on a rare NOS canister for my vehicle.

P.S.edit: And that is assuming the innards don't deteriorate while sitting on the shelf somewhere for decades.
 
Last edited:
dibbons said:
The main problem with them is that as they get older and older, there is the chance the activated charcoal could be sucked into the innards of your carburetor (plugging things up) as the screen to prevent this disintegrates. That's why I spent a couple of hundred bucks on a rare NOS canister for my vehicle.
Click to expand...
is there anything to replace or service the canister?
Also i have 2 and 1 of them when you shake it, it sounds like a morroca.
the other nothing. which is correct?
 
I don't know what they should sound like shaking them. They are difficult to take apart and service. It has been suggested to renew the activated charcoal by finding some at a pet store (I think the charcoal is used in aquarium filters). I guess you could duplicate the "screen" with any similar (or better) material.

The other question is this: What type of activated charcoal did Chrysler use in original equipment? There are probably different grades, calibers, processes, and maybe even additives used during production. I don't think any one is familiar with any "Mopar Guru" who would know the exact details.
 
on my 78 dodge van the hood sticker says it suppose to have 2 canisters?
if so where are they placed?
the one that is in there is mounted to the frame on its side just behind the pass seat.
the manual states it should be straight up?
 
Shermdog said:
I rebuilt mine and really happy with how it turned out. There's some other forums that have pretty decent information.

Vapor Canister Rebuild - A new how to - International Full Size Jeep Association

My Jeep CJ5 Page - Charcoal Canister Rebuild
Click to expand...
First one is mine. "my other car is a fish" is the only clue. LOL
If anyone has questions I'll try to answer.
When the charcoal bits start migrating, they make their way into the carb bowl and cause all sorts of semi-random havoc.
Those jeeps used an electric solenoid valve to seal off the carb bowl from the cannister while the engine was running. But when the valve stops sealing, the charcoal moves right on through.
 
Question? can you, me, or I put a filter to keep the granules from going in carb?
if NO why Not?
Also have you ever heard of 2 canisters?
 
If you look closely. The canisters in the 70's for Mopars were from GM also.
 
Last edited:
moparblood said:
Question? can you, me, or I put a filter to keep the granules from going in carb?
if NO why Not?
Also have you ever heard of 2 canisters?
Click to expand...
That's basically what was at the top of the cannisters. Foam filter material that disintegrated.
Probably could put an in-line filter in bowl vent - eventually it will probably plug up. Some of the finer charcoal dust will probably migrate through eventually.
But what about the fuel tank vent lines? Probably not as much of airflow that way, but ....

It wasn't that hard to cut open the ones on the jeeps.
Hardest part was the figuring out what materials to use for the foam and the purge diagphram.
 
i guess this was something that was taken widely for granted.
40 years ago i lived in Denver, outside the city you could see the smog cloud hanging over it.
i Don't understand why then wouldn't the factory make it serviceable.
there's got to be someone who knows Who manufactured these, and what materials were used.
i might even put 1 on my 65 dodge.
 
The guys that rebuild them use charcoal from a fish aquarium. It works fine and is the correct size grain.
 
It does seem silly these weren't made to be serviceable but maybe they were worried about tampering.
Anyway you can see from the photos how I did it. As well as how the other Matt did it.
 
They were made to last through a reasonably-foreseeable service lifespan. These cars we talk about on here are long past the end of their intended lifespan. When you drive an unusually old car, you're going to wear out unusual things: ignition keys, dashboard chrome…emissions canisters.

Yes, many of them were made by GM's Rochester Products division. Yes, people have installed an ordinary fuel filter in the hose to prevent migration of charcoal granules when the foam inside the canister fails, but that's a short-term, get-by measure. Yes, aquarium charcoal is a fine refill. Mattax, if I were "grading" your rebuild I'd give it an A; that's nice work.

Info on adapting non-original canisters and how to hook up an inline purge valve here.
 
slantsixdan said:
Info on adapting non-original canisters and how to hook up an inline purge valve here.
Click to expand...

thats what i did on my 71 when i converted from a /6 to an LA, and the original can was long gone
not much too it if you follow the instructions
 
You must log in or register to reply here.
-

Back
Top