Charcoal canister delete?

idahovette · Apr 22, 2023

G-Daughter Macie on a Softball scholarship, went to school with a fellow named Easton, named specifically for the Bat and the Company. He' on a Baseball scholarship somewhere over in Oregon and doing well. Macie keeps tabs on him. Anyway tell your Easton to keep up the GOOD work, on the field and in the garage!!!!!........and GREAT job DAD

Randy and Easton · Apr 22, 2023

SirRobyn0 said:
No it doesn't hurt to keep it. Besides keeping gas fumes down it also keeps moisture out of the tank (reducing rust). Especially important with todays fuels. If you at all interested in keeping the system you should check out this thread. https://www.gmsquarebody.com/threads/charcoal-vapor-evap-canister-how-it-should-be-set-up-and-other-information.37324/
It's really a simple, yet often misunderstood system.

@SirRobyn0 great thread. I will add canister back in based on your comment. The explanation and how to connect was great. I’m going to do the easy vent for now as I get canister and fabricate a mount for front clip.

Thanks so much

Randy and E

Randy and Easton · Apr 22, 2023

@idahovette thanks for the kind words.. don’t think college is in his future, but he loves the game. Coaches a 12U local team and has since they were 8 so his heart is in the game. Wants to wrench on something for a living I think. He knows the Lord so He will direct him..
we are proud of him, y’all on this forum have helped so much. He is learning to help others even when it’s inconvenient or frustrating… want him to have a servant heart…

SirRobyn0 · Apr 22, 2023

Randy De Oreo said:
@SirRobyn0 great thread. I will add canister back in based on your comment. The explanation and how to connect was great. I’m going to do the easy vent for now as I get canister and fabricate a mount for front clip.

Thanks so much

Randy and E

As you add it back in, if you have questions feel free to tag me in either thread. I'm not going to say I know it all, but I know fair bit about these evap-systems and will help in anyway I can.

Ricko1966 · Apr 22, 2023

I hate to admit this,hate to recommend it but,I have used a fuel filter as a fuel tank vent,one side in a line to the tank, the open end pointing down the theory to me was the paper would absorb water vapor and stop dirt,etc.from getting in the tank.

squaredeal91 · Apr 22, 2023

Ricko1966 said:
I hate to admit this,hate to recommend it but,I have used a fuel filter as a fuel tank vent,one side in a line to the tank, the open end pointing down the theory to me was the paper would absorb water vapor and stop dirt,etc.from getting in the tank.

Sounds like a good idea

SirRobyn0 · Apr 23, 2023

Ricko1966 said:
I hate to admit this,hate to recommend it but,I have used a fuel filter as a fuel tank vent,one side in a line to the tank, the open end pointing down the theory to me was the paper would absorb water vapor and stop dirt,etc.from getting in the tank.

And I've done it on a short term basis as well. Stuffing a small fuel filter on the end of the vent line is better than nothing, but having the proper closed canister system is much better.

Randy and Easton · May 11, 2023

Made an interim fuel vent/charcoal filter (not to vacuum) and sealed the cap again to see if this will work while I fab up the mount for the original canister.

Will report how this works venting tank and keeping fumes down.

Randy and E

Bextreme04 · May 11, 2023

Nice. I'm contemplating doing something similar. I'm trying to decide if I want to do something simple like that or put the canister in and wire in a purge and vent solenoid to be run by the LS computer.

I think at this point I might just run a vent line like you have it to get rid of the constant fuel smell from my truck until I get around to doing something different.

blueburban87 · Jul 19, 2024

@Bextreme04 I love these older threads, they help solve problems in the future.
I wanted to get some thoughts on this. I had the same issue Canister overflowed spilling fuel in the engine bay on a hot day . A tech i spoke to mentioned I could take the vapor line at the tank and run a hose from that and Tee into the Overflow hose that runs beside the filler neck to solve the issue. Thoughts on this?

blueburban87 · Jul 19, 2024

Randy and Easton said:
Made an interim fuel vent/charcoal filter (not to vacuum) and sealed the cap again to see if this will work while I fab up the mount for the original canister.

Will report how this works venting tank and keeping fumes down.

Randy and E

After a year later how did this setup work for you?

Randy and Easton · Jul 19, 2024

crpate said:
After a year later how did this setup work for you?

Perfectly! No complaints and no gas fumes smell

Oldbear42 · Jul 19, 2024

SquareRoot said:
I was having a similar issue. when it got hot here (100+) I could shut the truck off and hear the tank make that "popping sound" when metal expands/contracts. New tank, recently converted to EFI. So one time I looked under the truck and could actually see the tank was expanded in the brackets. wow, so I loosened the cap slightly and it blew hot air out for a good 15-20 seconds! I was dumbfounded. So I did a bunch of research and discovered that "vented" caps are only vented one direction. They let air in but not out. But that wasn't my issue (or possibly yours). I plan to just drill a small 1/8 hole in my cap but have been too lazy. I have been keeping the cap loose enough to keep it from sealing and eliminated the problem. Apparently, the cannister does not have enough capacity to absorb two 20 gallon tanks worth of expansion which befuddles me. I have tested the valve on the cannister with a vacuum pump and it works as intended yet the tank still builds pressure.

I have a similar issue. I parked the Square on the driveway after 40 minutes of driving around the town I work in and 20 minutes of driving back home. My son came in to tell me that something was leaking on the truck - it sounded like a tire. I went out, and you could hear the tank trying to vent through the cap, but it was struggling - it also has what looks like differential vents installed, but I think they might be plugged. My vent line was capped off by the PO and all the emissions stuff was removed from the motor. I plan to install small breathers (properly filtered fuel tank vents) or a canister on the vent lines soon.

Bextreme04 · Jul 19, 2024

crpate said:
@Bextreme04 I love these older threads, they help solve problems in the future.
I wanted to get some thoughts on this. I had the same issue Canister overflowed spilling fuel in the engine bay on a hot day . A tech i spoke to mentioned I could take the vapor line at the tank and run a hose from that and Tee into the Overflow hose that runs beside the filler neck to solve the issue. Thoughts on this?

If that is happening, I would say you have a purge issue. Running the T into the overflow line will make it a closed system and you would need to get a vented cap in order to prevent the tank from blowing up or collapsing

blueburban87 · Jul 21, 2024

How I ended managing the purge vent situation on a squarebody.
took a screw style filter, filled with charcoal used for refrigerator air purification. Run to a boat style vent tube that fit perfectly into the driver side fender that already had a whole factory drilled. Use at your own risk, this capture the hydrocarbons in the charcoal and is easy to refill if needed. Also the purge vent on the end used on inboard boats help with venting.

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Charcoal canister delete?

idahovette

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