Charcoal Canister replacement - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**71CHEVYSHORTBED402** · 09-21-2015, 04:03 PM

I'm staring at my canister, which is no good. If they're good the charcoal should feel loose when you shake the canister. Can't speak for all, but the 71 truck canister does not open (WTH were they "thinking", they would last forever?).....

I believe the alternatives are 1. Cut the canister open to replace the charcoal, and glue it back together. 2. Take it off, use a vented gas cap and leave the line for the gas tank open with a breather on the end See edit.

My questions are:

1. Are there any other practical alternatives?

2. Have you been able to locate a reproduction that fits and has the correct hose nipples? Note: There are three nipples. One from the gas tank, one from the carb and one from a PCV valve.

Incidentally: Appears replacing the canister with NOS or an OEM that's still good is next to impossible.

Edit: Well, once upon a time I had breather cap on the end of the line coming from the tank. I just got underneath and it's no longer this way. There are three lines for the fuel pump. 1. Gas in from the tank. 2. The air line from the gas tank. 3. Gas to the carb. I'm not mechanical enough to know what this is all about, I can only say it works.

09-21-2015, 04:03 PM	#1
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,692	Charcoal Canister replacement I'm staring at my canister, which is no good. If they're good the charcoal should feel loose when you shake the canister. Can't speak for all, but the 71 truck canister does not open (WTH were they "thinking", they would last forever?)..... I believe the alternatives are 1. Cut the canister open to replace the charcoal, and glue it back together. 2. Take it off, use a vented gas cap and leave the line for the gas tank open with a breather on the end See edit. My questions are: 1. Are there any other practical alternatives? 2. Have you been able to locate a reproduction that fits and has the correct hose nipples? Note: There are three nipples. One from the gas tank, one from the carb and one from a PCV valve. Incidentally: Appears replacing the canister with NOS or an OEM that's still good is next to impossible. Edit: Well, once upon a time I had breather cap on the end of the line coming from the tank. I just got underneath and it's no longer this way. There are three lines for the fuel pump. 1. Gas in from the tank. 2. The air line from the gas tank. 3. Gas to the carb. I'm not mechanical enough to know what this is all about, I can only say it works. __________________ Tony 1971 C10 Custom Deluxe SWB 402/400TH A/C I developed an assembly information kit for restoring my truck from nuts and bolts. It's written in Assy. order, short & simple, packed with all OEM hardware ID; castings; part ID; 100s of part numbers; wiring simple - Resource, and trivial too. Much info. applies to all 67-72 GM, A/C vehicles, esp. trucks W/O saying. Full search ability, including to 700+ images of illus., parts, charts, Assy., points of interest, cab, bed, & front clip cart plans- Specials and cores were serviced out and R excluded e.g. front/rear glass, body/paint, engine core, rebuilt hinges, steering box, trans, etc. The project was in-line with long former professions developing process, policy, specs, demo, written for novices, admin., policy, engineers, development, systems & test - Public & govt 2, gross. Sell soft copy cheaply, PM if interested.Build thread:https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 09-22-2015 at 09:19 PM.



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