Charcoal Canister?

Slant 6 Engines

  1. moparblood

    moparblood Well-Known Member

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    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?
     
  2. pishta

    pishta I know I'm right....

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    keep it, does nothing to hinder performance. Its all emissions related to gas fumes only.
     
  3. moparblood

    moparblood Well-Known Member

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    why do 2 of the lines go to carb?
     
  4. pishta

    pishta I know I'm right....

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    Fuel bowl breather (out) and maybe vacuum line (in) to suck charcoal canister contents? Could look on carb and see where connections are.
     
  5. moparblood

    moparblood Well-Known Member

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    excellent! köszönöm
     
  6. 67Dart273

    67Dart273 FABO Gold Member FABO Gold Member

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    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.
     
  7. slantsixdan

    slantsixdan =..=

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  8. moparblood

    moparblood Well-Known Member

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    God i love this forum.
     
  9. MoparMike1974

    MoparMike1974 FABO Gold Member FABO Gold Member

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    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.
     
  10. dibbons

    dibbons FABO Gold Member FABO Gold Member

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    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: Jan 12, 2020
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    • moparblood

      moparblood Well-Known Member

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      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?
       
    • dibbons

      dibbons FABO Gold Member FABO Gold Member

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      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.
       
    • moparblood

      moparblood Well-Known Member

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    • dibbons

      dibbons FABO Gold Member FABO Gold Member

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      I like that idea, looks simple enough, must be one inlet and one outlet.
       
    • moparblood

      moparblood Well-Known Member

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      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

      Shermdog FABO Gold Member FABO Gold Member

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      • Mattax

        Mattax Just the facts, ma'am FABO Gold Member

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        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.
         
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        • moparblood

          moparblood Well-Known Member

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          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?
           
        • 72Dart6pack

          72Dart6pack Well-Known Member

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          If you look closely. The canisters in the 70's for Mopars were from GM also.
           
          Last edited: Jan 12, 2020
        • Mattax

          Mattax Just the facts, ma'am FABO Gold Member

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          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.
           
        • moparblood

          moparblood Well-Known Member

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          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.
           
        • 72Dart6pack

          72Dart6pack Well-Known Member

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          The guys that rebuild them use charcoal from a fish aquarium. It works fine and is the correct size grain.
           
        • Mattax

          Mattax Just the facts, ma'am FABO Gold Member

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          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.
           
        • slantsixdan

          slantsixdan =..=

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          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.
           
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          • diymirage

            diymirage HP@idle > hondaHP@redline

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            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
             
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