Charcoal canister filter replacement - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Charcoal canister filter replacement

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFREE Shipping Sale!FS: Jeep Fog Light LED Bulbs! Several Brightness Options!

Reply
Unread 05-10-2010, 12:12 PM   #1
JeffreyCharles
Registered User
1976 CJ5 
 
Join Date: Feb 2009
Location: Vallejo, CA
Posts: 667
Charcoal canister filter replacement

After reading up on a number of threads regarding fuel vapor smells/leakage - particularly Mike Romain's postings - I decided to give a shot at replacing the filter at the bottom of my canister while I was doing an oil change over the weekend. Picked up a replacement filter from Napa (part #2998 - Filter Breather) for about $3, pulled the canister up and flipped it over and was initially stumped as to how to remove the old filter. It quickly became obvious one simply pulls it out past the plastic molding across the canister bottom. Mine wasn't attached or held in place by anything other than that molding (a lip around the edge of the canister bottom and a thin bar across the middle).

At first I just kinda poked at the old filter (which was filthy) and then I set the canister back down, upright, to answer a question from my wife. At that point I heard an odd sound which turned out to be the charcoal running out of the canister all over the ground. Apparently I'd shifted the old filter to the side just enough to create a hole.

So I cleaned that up, put the charcoal back into the canister (about a cup's worth), installed the new filter and all seems well.

My question: is it really the case that the filter is just held in place the way I describe? Or is mine perhaps missing some screws or some other retaining mechanism to make it all more secure? Seems like it would be easy for a branch or something to poke up just right and catch that filter, pushing it aside just enough to allow the charcoal to all fall out.

Here are the old and new filters:

http://jeep.smallcraft.net/projects/...s/IMG_0406.jpg

And here's the underside of the canister:

http://jeep.smallcraft.net/projects/...s/IMG_0407.jpg

__________________
Jeffrey Charles
http://jeep.smallcraft.net/
JeffreyCharles is offline   Reply With Quote Quick reply to this message
Unread 05-10-2010, 02:53 PM   #2
Mike Romain
Registered User
1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 16,492
The newer ones have a screen to hold in the charcoal better, but otherwise that's the same as mine.
__________________
Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
Mike Romain is offline   Reply With Quote Quick reply to this message
Unread 05-10-2010, 04:37 PM   #3
JeffreyCharles
Registered User
1976 CJ5 
 
Join Date: Feb 2009
Location: Vallejo, CA
Posts: 667
Thanks Mike!
__________________
Jeffrey Charles
http://jeep.smallcraft.net/
JeffreyCharles is offline   Reply With Quote Quick reply to this message
Unread 05-10-2010, 09:28 PM   #4
Hybrid Jeep
Registered User
1976 CJ5 
 
Join Date: Aug 2007
Location: Monument, CO
Posts: 1,021
Wouldn't be a bad idea to pick yourself up some activated carbon at a pet store.. replace the 30 year old stuff with new!
Hybrid Jeep is offline   Reply With Quote Quick reply to this message
Unread 05-12-2010, 11:07 AM   #5
JeffreyCharles
Registered User
1976 CJ5 
 
Join Date: Feb 2009
Location: Vallejo, CA
Posts: 667
Good idea, I hadn't thought of that. Same stuff, huh?
__________________
Jeffrey Charles
http://jeep.smallcraft.net/
JeffreyCharles is offline   Reply With Quote Quick reply to this message
Unread 05-12-2010, 11:27 AM   #6
thord
Registered User
1986 CJ7 
 
Join Date: Feb 2009
Location: Memphis
Posts: 205
i replace the filter on mine, but did not see a way to get the old charcoal out. how do you do that to replace it?
thord is offline   Reply With Quote Quick reply to this message
Unread 05-12-2010, 04:29 PM   #7
JeffreyCharles
Registered User
1976 CJ5 
 
Join Date: Feb 2009
Location: Vallejo, CA
Posts: 667
Though I haven't replaced my charcoal at this point it was very easy to remove the old charcoal once the filter was removed - simply turn the canister right-side up over a bucket and all the charcoal will simply fall out on its own. At least, that's the way it was with my canister.
__________________
Jeffrey Charles
http://jeep.smallcraft.net/
JeffreyCharles is offline   Reply With Quote Quick reply to this message
Unread 05-12-2010, 08:06 PM   #8
DUX4LIFE
Registered User
1977 CJ7 
 
Join Date: Jul 2009
Location: ILLINOIS
Posts: 436
I cut the seam at the bottom and the bottom grate came off and the charcoal came out. I rinsed the charcoal and poured it back in. Then reused the filter element and glued the bottom back on. If your careful when you cut the seam it will go back together easily. I think there is a lip on the bottom.
DUX4LIFE is offline   Reply With Quote Quick reply to this message
Unread 07-10-2015, 06:24 AM   #9
Rebel1970
Registered User
1983 CJ7 
 
Join Date: May 2015
Location: Bristol, TN
Posts: 57
Ok Guys
Here is my question. Are these filter really necessary, and what do they do?
Rebel1970 is offline   Reply With Quote Quick reply to this message
Unread 07-10-2015, 07:11 AM   #10
Mike Romain
Registered User
1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 16,492
Quote:
Originally Posted by Rebel1970 View Post
Ok Guys
Here is my question. Are these filter really necessary, and what do they do?
They are a $2.00 air filter for the gas tank vent. I have plugged mine up playing in mud and when this happens a vacuum gets created in the gas tank starving it for fuel. I have had to drive home several times with my gas cap cracked open so it would run.
Even at idle after warming up, when it gets too dirty from just off road dust and I open the gas cap, my idle speed comes up noticeably.
__________________
Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
Mike Romain is offline   Reply With Quote Quick reply to this message
Unread 07-11-2015, 09:22 PM   #11
raven3
Registered User
1973 CJ5 
 
Join Date: Oct 2014
Location: Bakersfield, CA
Posts: 211
On my stock 73 charcoal canister
there is both a plastic grating and a bar across the bottom
cover, seems redundant.
Believe the bottom cover lip to cylinder seam
can be cut with a sharpe exacto knife.
With bottom cover removed, the pad and activated charcoal can be removed and replaced.
What to use for an adhesive for polypropylene plastic is unknown.
Since canister is made with thermo plastic material maybe the seam can be made with soldering iron,
by melting the plastic because the seam does not have to be water tight.
On my canister the pad decomposed and allowed all the carbon to gravity flow out the bottom through the grating.
Could have happened decades ago.
raven3 is offline   Reply With Quote Quick reply to this message
Unread 07-13-2015, 05:03 PM   #12
JeffreyCharles
Registered User
1976 CJ5 
 
Join Date: Feb 2009
Location: Vallejo, CA
Posts: 667
Quote:
Originally Posted by Rebel1970 View Post
Ok Guys
Here is my question. Are these filter really necessary, and what do they do?
Think of it as a completely passive, benign system that actually does something good. Doesn't rob you of any performance, horsepower, etc. And it captures gas fumes to be drawn back in and burned later on. The tank *needs* to be vented somehow, and having the canister at the end of the vent line ensures gas fumes aren't just escaping to the atmosphere (whether or not you care about the environment is beside the point, it doesn't smell good and that person who cooks your dinners is gonna complain...).

Keep it, fix it if broken, and get rid of performance-robbing stuff elsewhere.
__________________
Jeffrey Charles
http://jeep.smallcraft.net/
JeffreyCharles is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.