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Replacement Emissions (Charcoal) Canister
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Farf
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PostPosted: Sat Nov 02, 2019 3:05 pm    Post subject: Replacement Emissions (Charcoal) Canister Reply with quote

My emissions canister has been kaput (no charcoal) for years. Thought I would replace it with the Van Cafe offering. The bottom outlet is oval shaped and quite large compared to the stock unit. I wanted a better seal than just a silicon seal. I cut off about an inch of the oval outlet, heated it with a heat gun and rounded it out a bit with some channel locks and screwed a 3/4" MPT (male pipe thread) x 3/8" hose barb brass fitting in. It was a nice fit. Reheated the connection and installed a hose clamp. The fitting will unscrew it needed. I had to heat the top existing fitting a little bit to get it to go on. Very easy to do.

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blackglasspirate
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PostPosted: Sun Nov 03, 2019 8:29 am    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

Nice. I'm going to have to do this when I replace mine. Pretty sure I got too aggressive with the compressed air last time I was cleaning it out and may have blown a small hole out inside it Confused
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Igeo
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PostPosted: Sun Nov 03, 2019 9:13 am    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

Is this canister something that should be replaced periodically? Like every 30 years or so?
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buspor63
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PostPosted: Sun Nov 03, 2019 9:30 am    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

That looks to be a good fix for a part that is not quite right for the fitment.
Another question for the knowledgeable?
At some past point< I took the bottom hose off and the charcoal drained out like sand. Is that normal?
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blackglasspirate
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PostPosted: Sun Nov 03, 2019 9:48 pm    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

buspor63 wrote:
That looks to be a good fix for a part that is not quite right for the fitment.
Another question for the knowledgeable?
At some past point< I took the bottom hose off and the charcoal drained out like sand. Is that normal?


Not normal as far as I know. The charcoal bits shouldn’t come out at all. The sand you saw was maybe just from it getting clogged from dust. It it was indeed charcoal bits then your canister is probably hosed or getting there.
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Merian
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PostPosted: Sun Nov 03, 2019 10:55 pm    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

Igeo wrote:
Is this canister something that should be replaced periodically? Like every 30 years or so?


No - they are good until they either fall apart, or get contaminated by liquid fuel

- answer courtesy of CARB
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PostPosted: Mon Nov 04, 2019 7:53 am    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

Merian wrote:
Igeo wrote:
Is this canister something that should be replaced periodically? Like every 30 years or so?


No - they are good until they either fall apart, or get contaminated by liquid fuel

- answer courtesy of CARB


I'd replace the charcoal canister as soon as you hear any cavitation noise coming from your gas tank. When that canister is plugged or ineffective, it can cause rather loud suction noises in the tank as in "Ka-boom!" and air rushing in upon opening the gas cap. Ask me how I know. I covered the open end on the new version with some pantyhose and wire to stop any debris/insects from lodging in there. Inspect regularly.
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PostPosted: Mon Nov 04, 2019 12:46 pm    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

yes, obviously cannot work if plugged

blow into it to test

or suck some fumes out and then go buy a van on the abomination thread (Wall of Shame)... Razz
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PostPosted: Mon Nov 04, 2019 1:52 pm    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

More on the subject: https://intrepidoverland.com/eec-aka-the-charcoal-canister/ .
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Franagon
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PostPosted: Wed Apr 15, 2020 6:34 pm    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

This is all pure awesomeness! I finally have gotten to this part from doing my bostig conversion back in 2016. I am not sure how I have the system now, but I will be installing a new tank along with some other bits and want to have it all right. (haven't been experiencing any issues) So, do I need some sort of 'vacuum actuated purge valve' in the line coming from the bottom of the canister to my intake manifold? I guess I just need to search for that part for the Focus/Zetec and plumb it as it should be? Brilliant job to the OP for using that NPT to barb fitting like that. Thanks all!
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PostPosted: Thu Apr 16, 2020 6:58 am    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

When I did my tank reseal, I started hearing the bonk from my gas tank flexing in as I warmed up the engine. And, again when it relaxed after stopping the engine. I took my canister out, and cleaned the inlet. The bonk went away.

Under a year later, I started smelling gas on full gas tank fills. I was distraught, as that tank drop was no fun, and the thought of having messed it up somehow was giving me fits. Well, I now figured out that the charcoal can is plugged again, and somewhere along the timeline, that clog had forced out at least one of my seals when the gas had warmed up.

SO, lesson here, for me at least, is to pay better attention to the charcoal can. Replacing it once in a while would obviously include clearing any clogs, and thus, perhaps keep from blowing the seal(s) again.

-bobby
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dabaron
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PostPosted: Tue Oct 27, 2020 3:44 pm    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

while i'm changing my canister, is there a good replacement for the check valve that opens to draw air to the intake manifold?
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dabaron
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PostPosted: Tue Dec 01, 2020 3:18 pm    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

dabaron wrote:
while i'm changing my canister, is there a good replacement for the check valve that opens to draw air to the intake manifold?


anyone?
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PostPosted: Sun Apr 04, 2021 8:03 pm    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

bobbyblack wrote:
When I did my tank reseal, I started hearing the bonk from my gas tank flexing in as I warmed up the engine. And, again when it relaxed after stopping the engine. I took my canister out, and cleaned the inlet. The bonk went away.

Under a year later, I started smelling gas on full gas tank fills. I was distraught, as that tank drop was no fun, and the thought of having messed it up somehow was giving me fits. Well, I now figured out that the charcoal can is plugged again, and somewhere along the timeline, that clog had forced out at least one of my seals when the gas had warmed up.

SO, lesson here, for me at least, is to pay better attention to the charcoal can. Replacing it once in a while would obviously include clearing any clogs, and thus, perhaps keep from blowing the seal(s) again.

-bobby


Ah thank heaven. I've finally stumbled across the right terms trying to figure out how to properly search the issue I've been having since replacing and sealing my fuel tank.

So as stated, I replace my fuel tank, and the fuel tank re-seal kit. After driving to the gas station and fueling up the first time, I noticed fuel coming from the top of the tank again when it hit full. Super annoyed since I'd just wrestled with the damn thing, I felt through the front RH wheel well to see if I noticed anything out of place and found the right side crossover tube tank seal was now inside the tank, still attached to the nipple.

I figured I must have pushed it in when I was setting the tank in place by accident, and replaced it. Ever since then, when sitting at a stop light, I hear these weird bonking/thud sounds from underneath me.

Now it makes total sense. The charcoal canister is plugged, and my fresh newly sealed tank is now so sealed and the canister is so plugged that it's actually pulling enough vacuum on the tank be noisy.

I guess that's next to replace!
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Franagon
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PostPosted: Mon Nov 18, 2024 11:55 am    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

It takes me awhile to do things.... I see I posted to this in 2020. Well, I've collected all the bits, but mainly curious about the 2 'ports' on top of this charcoal canister the OP shows. I now have mine set up the same way. Do I block the 'small' port at the top of the canister or? I was going to route to the clean side of my air [filter] box, and then the other end to the tank. Kind of like the Bentley shows. (Well hoping that on the clean side of the air box does not pull a vacuum on the canister and tank. Haven't figured that out quite yet) Some just put a screen or filter over the open end, which would go to the air box. Any way, mostly interested in the 2 ports at the top. Do I just use the larger one, plug the small one? Thanks!
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PostPosted: Thu Nov 21, 2024 10:40 am    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

I whipped up an adapter for the bottom vent of this canister for a 1/4" hose.
I've used it to plumb the bottom vent into the unmetered side of the air intake. This will more or less guarantee that dust and other crap stay out of it.

Ideally print it in nylon due to presence of gasoline vapours, but it should last a good while in ABS or ASA.

It slides in snugly, but I added a smear of The Right Stuff to hold it in place.

https://www.printables.com/model/1082012-vanagon-charcoal-canister-nipple-adapter

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PostPosted: Thu Nov 21, 2024 11:39 am    Post subject: Re: Replacement Emissions (Charcoal) Canister Reply with quote

Franagon wrote:
It takes me awhile to do things.... I see I posted to this in 2020. Well, I've collected all the bits, but mainly curious about the 2 'ports' on top of this charcoal canister the OP shows. I now have mine set up the same way. Do I block the 'small' port at the top of the canister or? I was going to route to the clean side of my air [filter] box, and then the other end to the tank. Kind of like the Bentley shows. (Well hoping that on the clean side of the air box does not pull a vacuum on the canister and tank. Haven't figured that out quite yet) Some just put a screen or filter over the open end, which would go to the air box. Any way, mostly interested in the 2 ports at the top. Do I just use the larger one, plug the small one? Thanks!


Maybe this will help: https://www.thesamba.com/vw/forum/viewtopic.php?p=9361969 ?
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