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djkeev
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Joined: September 30, 2007
Posts: 32983
Location: Reading Pennsylvania
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djkeev
Samba Moderator
Joined: September 30, 2007
Posts: 32983
Location: Reading Pennsylvania
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madspaniard
Samba Member
Joined: August 18, 2008
Posts: 3795
Location: Alameda, CA
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 Posted: Fri Dec 12, 2014 10:39 pm Post subject: |
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Yes, this was discussed some pages before. If you don't pipe the bottom port to the frame at least make sure you add a mesh or screen around it to stop spiders and other bugs to take home inside your canister. I piped mine to the frame.
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1991 Westy auto w/ Peloquin TBD
"The only difference between me and a madman is that I'm not mad” - Salvador Dali |
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SteelB12
Samba Member
Joined: December 21, 2010
Posts: 591
Location: Central Virginia
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| Posted: Sun Dec 14, 2014 11:27 pm Post subject: |
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Hey, really stupid question, but is this hard to access?? I haven't crawled under my van in awhile, but I don't recall having easy access to this canister or the check valve.
I just ordered a new canister from that Hansauto place and a new check valve from Bus Depot . Just hoping its not too hard to replace these so that these parts don't end up sitting on a shelf in my garage for a couple of months.
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1987 Westy |
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djkeev
Samba Moderator
Joined: September 30, 2007
Posts: 32983
Location: Reading Pennsylvania
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SteelB12
Samba Member
Joined: December 21, 2010
Posts: 591
Location: Central Virginia
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| Posted: Mon Dec 15, 2014 8:37 am Post subject: |
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Sounds easy
Thank you!
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1987 Westy |
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madspaniard
Samba Member
Joined: August 18, 2008
Posts: 3795
Location: Alameda, CA
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| Posted: Mon Dec 15, 2014 11:01 am Post subject: |
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I was able to replace the canister plus the check valve above it without removing the tire. Quick job.
_________________
1991 Westy auto w/ Peloquin TBD
"The only difference between me and a madman is that I'm not mad” - Salvador Dali |
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SteelB12
Samba Member
Joined: December 21, 2010
Posts: 591
Location: Central Virginia
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| Posted: Thu Dec 18, 2014 8:45 pm Post subject: |
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While waiting for the new canister to arrive, I've been tinkering with the AFM. in the Bentley, page 24.50, it shows a hose from the charcoal canister to the air filter housing. Mine does not have this hose. The 90degree tube popping out of the air filter housing has a rubber cap at the end.
Could this missing piece possibly be a factor in my crappy gas mileage?
87 2.1 wbx
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1987 Westy |
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djkeev
Samba Moderator
Joined: September 30, 2007
Posts: 32983
Location: Reading Pennsylvania
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SyncroChrick
Samba Member
Joined: January 10, 2005
Posts: 1034
Location: San Francisco, CA
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| Posted: Thu Dec 18, 2014 9:53 pm Post subject: |
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looks like ECSTuning has it for $40
http://www.ecstuning.com/ES293790/
it looks more similar to the original one. I bought before from them, no issue. |
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SteelB12
Samba Member
Joined: December 21, 2010
Posts: 591
Location: Central Virginia
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| Posted: Thu Dec 18, 2014 9:56 pm Post subject: |
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| djkeev wrote: |
| SteelB12 wrote: |
While waiting for the new canister to arrive, I've been tinkering with the AFM. in the Bentley, page 24.50, it shows a hose from the charcoal canister to the air filter housing. Mine does not have this hose. The 90degree tube popping out of the air filter housing has a rubber cap at the end.
Could this missing piece possibly be a factor in my crappy gas mileage?
87 2.1 wbx |
Not all years had that hose to the air filter, a hose shoved in the frame is factory.
My 86 has the air filter fitting but has a rubber plug over it.
Dave |
Well damn, I was hoping I found something wrong. my 87 has that hose going into the frame from the canister
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1987 Westy |
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Mellow Yellow 74
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Joined: October 14, 2014
Posts: 1615
Location: Sydney, Australia
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| Posted: Sat Dec 20, 2014 4:38 pm Post subject: |
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I have installed my Chinese ebay canister - I connected the oval outlet on the bottom to the original hose to my air filter box using a 1-1/4" vinyl hose, a 1-1/4" plastic elbow and a 1-1/4" to 1/2" plastic stepped reducer.
Unfortunately i don't think this was what was causing my fuel tank "popping" issue - when I removed the old canister the tank did not relieve pressure but it did when I removed the cap, so there must be a blockage upstream or faulty rollover valve (although unlikely that both sides would be faulty at the same time).
It was still worth doing but I need to do some further investigation.
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1962 Karmann Ghia
1974 Deluxe Microbus
1985 Caravelle (Vanagon)
Last edited by Mellow Yellow 74 on Sat Dec 20, 2014 10:19 pm; edited 1 time in total |
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Mellow Yellow 74
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Joined: October 14, 2014
Posts: 1615
Location: Sydney, Australia
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| Posted: Sat Dec 20, 2014 8:04 pm Post subject: |
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| Mellow Yellow 74 wrote: |
| It was still worth doing but I need to do some further investigation. |
I worked it out - I removed the expansion tanks and the two inlet nozzles on both were completely blocked up with a gum like residue so I cleaned the nozzles out with a stiff wire and washed out the tanks. For anyone looking to change the charcoal canister i would check this first.
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1962 Karmann Ghia
1974 Deluxe Microbus
1985 Caravelle (Vanagon) |
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gears
Samba Member
Joined: October 28, 2002
Posts: 4411
Location: Tamarack, Bend, Kailua
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| Posted: Sun Dec 21, 2014 8:14 am Post subject: |
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| Mellow Yellow 74 wrote: |
| .. I connected the oval outlet on the bottom to the original hose to my air filter box using a 1-1/4" vinyl hose, a 1-1/4" plastic elbow and a 1-1/4" to 1/2" plastic stepped reducer... |
Anything that appears to be an adaptation will raise a red flag in Cali. Does anyone have a part number for the OE hose that fits this large oval fitting?
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aka Pablo, Geary
9.36 @ 146 in '86 Hot & Sticky
'90 Syncro Westy SVX
'87 Syncro GL 2.5
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madspaniard
Samba Member
Joined: August 18, 2008
Posts: 3795
Location: Alameda, CA
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| Posted: Sun Dec 21, 2014 8:56 am Post subject: |
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| gears wrote: |
| Does anyone have a part number for the OE hose that fits this large oval fitting? |
I thought about this too. You would have to look at a parts diagram for 84-93 Cabrio, 89-95 Corrado, 90-97 Passat, 84-89 Scirocco, 87-91 Audi 5000/100/200, 84-87 Audi 4000, 82-87 Audi Quattro. Those are the cars this canister is supposed to work for but keep in mind that with any of them you could also be in the same situation as the Vanagon, that is, this charcoal canister with the bottom oval opening replaced the original canister that had a round opening. I would assume we are looking for a small elbow fitting with an oval opening to fit the canister and a round opening for the hose, or as you say maybe just an oval hose.
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1991 Westy auto w/ Peloquin TBD
"The only difference between me and a madman is that I'm not mad” - Salvador Dali |
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xflyer
Samba Member
Joined: June 15, 2006
Posts: 304
Location: SOCAL
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| Posted: Thu Jun 14, 2018 8:52 am Post subject: Re: vapor canister replacement options |
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Attention All Vanagon Canister Replacers and Others.
I have posted this info before somewhere else.
I had the fuel tank clunk more than 20 years ago. It started a few years after I got my 89. I think this is another one of those times where a maker tried to save a few Euros, or Marks in those days.
All the vans that I have seen have the bottom fitting on the canister hooked up by a hose to the clean side of the engine air filter. Except those 1989 and later. There may be some variation, but that's what I have seen on many Vanagons.
The way this works is that when then van is parked the gasoline in the tank is evaporating. The hotter the temp the faster it evaps. The idea is to collect the vapors in the charcoal and when the engine is running, above idle the vapors are drawn into the intake manifold and burned in the cylinders.
Thing is the engine keeps on drawing all the time it is running and since the EVAP control valve is dumb it does not shut off the flow when the charcoal no longer has much fuel vapor in it. Then air has to flow into the canister through that bottom fitting. Most of us would want clean air to go into the engine. That's why the canister is hooked up to the air filter.
I found out that the canister was clogged and leading to the fuel tank clunk. The ones that have the short hose pushed into the grommet in the frame have a very thin fiberglass air filter in the bottom of the canister. Sooner or later, depending on how much dust is on the roads your Vanagon drives on, that filter will get plugged with dirt.
Then the engine vacuum will pull the top of the tank down. When the van comes to a stop and the engine is idling there is no more flow out of the canister and fuel tank vent line. That's because the EVAP valve is closed.
Then CLUNK, when the tank pops back into shape.
I got another canister from a junk yard and ran some 1/2"/12mm hose into the engine compartment. I attached the end to a small air filter. These are used by some "hot rodders" for breather filters on engines.
Since that time there has been no CLUNK and the Van has passed Calif emission testing at least 12 times.
Hope this helps.
PS Don't let your EVAP canister breathe dirty air.
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1989 Campmobile, 1984 7 passenger beater Vanagon
Both with cool A/C |
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xflyer
Samba Member
Joined: June 15, 2006
Posts: 304
Location: SOCAL
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| Posted: Thu Jun 14, 2018 8:55 am Post subject: Re: vapor canister replacement options |
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BTW my 1984 Vanagon has the same EVAP canister that the Germans installed on it when it was built. The bottom vent on the canister is hooked up via a hose to the clean side of the air filter. No CLUNK.
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1989 Campmobile, 1984 7 passenger beater Vanagon
Both with cool A/C |
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djkeev
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GreggK
Samba Member
Joined: May 17, 2008
Posts: 1010
Location: Colorado/Philidelphia
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| Posted: Fri May 01, 2020 7:37 pm Post subject: Re: vapor canister replacement options |
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I'm looking at re-locating my canister to a different location on my 2wd Vanagon. My new engine conversion has you install the fuel filter in the area where the original canister location was, in the passenger side rear wheel well. The canister has been re-located to the drivers side wheel well but I plan to run my AC hoses through that area and I want to have another location option if the hoses need that space.
So can you use a different size canister than the OEM? I thought about putting it back behind my drivers side rear light housing. On my Subaru conversion I remember that canister was smaller and pretty sure would fit back there. So could I use the Subaru canister in place of the OEM. My new engine is a diesel and I was told you don't need the canister but then I was told you should have one. I asked the mechanic where I'll be having my inspection done and he suggested to have one" just in case".... of what I don't know? So I'm deciding to keep the canister. Thanks for any advice!
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'86 2wd Poptop transplant
FAS TDi engine swap. Peloquin LSD
https://www.thesamba.com/vw/forum/viewtopic.php?t=692188&highlight=slow+but+steady |
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Karzapart55
Samba Member
Joined: May 26, 2004
Posts: 642
Location: Old Bridge NJ
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| Posted: Mon May 12, 2025 9:47 am Post subject: Re: vapor canister replacement options |
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Thanks
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Central Jersey Volkswagen Socity |
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