Another newbie question....what is this? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Buzzman · 07-21-2011, 08:40 PM

So, um, I don't know what this is. Next to the radiator on the driver's side is this cylinder with a few vacuum lines going to the carb. It's a 79 Chyenne with a GM Crate 350. My first thought was A/C, but I see no mention of it elsewhere. Trying to get rid of some stuff under the hood that I don't need...maybe this is one of them? Forgive the dumb question. Thanks.

And here's the truck, just 'cause I like to look at it.

youwish2bme · 07-21-2011, 08:43 PM

Its a charcoal canister for fuel fumes.

Dave

lilpoindexter · 07-21-2011, 08:44 PM

Some dude axed that not too long ago...its a a charcoal canister...it sucks up gas fumes so your car doesn't stink.

Buzzman · 07-21-2011, 08:48 PM

Huh. Will it be unbearable if I yank it out? Thanks guys.

youwish2bme · 07-21-2011, 08:55 PM

Quote:

Originally Posted by Buzzman

Huh. Will it be unbearable if I yank it out? Thanks guys.

I would think that you will be fine.... Just an emissions part from the 70's and 80's that really doesn't make a difference.

Dave

trevor73402 · 07-21-2011, 10:31 PM

Quote:

Originally Posted by lilpoindexter

Some dude axed that not too long ago...its a a charcoal canister...it sucks up gas fumes so your car doesn't stink.

He "axed" it?? You mean he chopped it out with an axe? Or do you mean "asked"?
Posted via Mobile Device

Stepper562 · 07-21-2011, 10:37 PM

I`m pretty sure he meant "asked" lol....Nice looking rig by the way. Yank it out!

Dan1969 · 07-21-2011, 11:14 PM

Isn't it part of your smog system as well? I have to get rid of mine, I already took off the other parts that came with it.

Goldfinger · 07-21-2011, 11:19 PM

carbon can. you really don't need it, it's mostly for show. just re-route the lines and it's fine.

Texasline · 07-21-2011, 11:40 PM

That little black canister is the Charcoal Canister...as was mentioned. It is extra baggage if your state does not require it for smog. In California it IS required. If your state is eminently considering Draconian type laws requiring stricter emission controls, consider keeping it. Shine it up and maybe it will look pretty

azjaeger · 07-22-2011, 11:43 AM

It's supposed to contain gas vapors from your fuel tank. However, I'd be really surprised if a vapor retention device from 1979 would still be able to retain vapors.

Remove it, it won't make any difference in how it runs..but you might want to stash it so if your state goes full greenie and starts requiring OE emission controls on 30 year old vehicles you can hollow it out and put it back on for show.

Keith Seymore · 07-22-2011, 11:58 AM

Quote:

Originally Posted by Buzzman

Huh. Will it be unbearable if I yank it out? Thanks guys.

People were ok without it for the previous 70 or 80 years of motor vehicle use....

K

njlimbaugh · 07-22-2011, 12:56 PM

Mine wasn't connected when I bought the truck, and every time I shut the engine off it off the garage stunk with gas fumes for an hour or more. I put in a new filter pad and connected all the hoses. That took care of the stink. The cannister won't interfere with performance one way or the other.

bigwheel15 · 07-22-2011, 01:17 PM

I pulled mine out shortly after getting my truck and I never noticed a difference one way or another. Basically if it bothers you or you want to clean up your engine bay...pull it. If not leave it.

veinbar · 07-22-2011, 01:18 PM

Quote:

Originally Posted by Buzzman

So, um, I don't know what this is. Next to the radiator on the driver's side is this cylinder with a few vacuum lines going to the carb. It's a 79 Chyenne with a GM Crate 350. My first thought was A/C, but I see no mention of it elsewhere. Trying to get rid of some stuff under the hood that I don't need...maybe this is one of them? Forgive the dumb question. Thanks.

And here's the truck, just 'cause I like to look at it.

Nice truck!!! Is that paint color Bright Poly Blue, or Medium Blue? Do you have the paint code... Sorry this is off topic, but there aren't too many blue squares on here.

Buzzman · 07-22-2011, 06:03 PM

Hey Veinbar,

I'm glad you brought it up, 'cause I'm having a bit of a hard time finding it. The truck was repainted, but from a few dings I can see that they matched the original finish. According to the '79 GM truck color chart @ autocolorlibrary, it's code 25 'brt. blue poly.' I just need a little bit for rust repair (rattlecan?), but I haven't seen '25' anywhere. I'm sure the color was used under different names and codes throught the years, but I'm not sure. It is a nice color, though. Any tips would be appreciated!

Stepper562 · 07-22-2011, 08:17 PM

I`m getting ready to desmog mine...yes I live in california, yes I know smog lows are horrible here. Not if you have a "guy" hehehe. Yank all unneccessary crap out. It`ll look soooooo much cleaner.

*cr34t3d_by_d4rkd3n* · 07-22-2011, 10:43 PM

no ones gonna say it? ok I will.....plug the lines if u remove it, not plugging them off will suck dirt and cause bad things, seriously ive removed all of them off every vehicle, but this method works, and this carb likes the suck from the can so it stays....its ur call just remember, worked fine for 35 years.....

Squareforceone · 07-22-2011, 11:18 PM

Quote:

Originally Posted by trevor73402

He "axed" it?? You mean he chopped it out with an axe? Or do you mean "asked"?
Posted via Mobile Device

haha my moms from chicago i know what thats like

camshaftgsxr · 07-24-2011, 03:14 PM

Quote:

Originally Posted by cr34t3d_by_d4rkd3n

no ones gonna say it? ok I will.....plug the lines if u remove it, not plugging them off will suck dirt and cause bad things, seriously ive removed all of them off every vehicle, but this method works, and this carb likes the suck from the can so it stays....its ur call just remember, worked fine for 35 years.....

maybe someone can clarify for me, where can i cut and plug the line coming from the fuel tank? (preferably before it gets to the underhood area)

KMK454 · 07-24-2011, 05:36 PM

What was the first year they started putting these in our trucks?

Buzzman · 07-24-2011, 09:32 PM

Thanks for all the replies. I will certainly plug the carb. The only thing I'm a bit worried about is keeping the ventilation for the gas tank. As I understand it, these canisters act as a vent for the tank and without a vented gas cap or other vent along the fuel line, there could be some issues. Could anyone elaborate on this? Thanks again!

njlimbaugh · 07-25-2011, 09:06 AM

If you plug the line from the fuel tank, the tank won't vent and the engine will starve for fuel due to vacuum building up. Just put new lines and a new filter in the cannister. It's there for several reasons, none of which will affect performance.

07-21-2011, 08:40 PM	#1
Buzzman Registered User Join Date: Jun 2011 Location: Spokane, WA Posts: 48	Another newbie question....what is this? So, um, I don't know what this is. Next to the radiator on the driver's side is this cylinder with a few vacuum lines going to the carb. It's a 79 Chyenne with a GM Crate 350. My first thought was A/C, but I see no mention of it elsewhere. Trying to get rid of some stuff under the hood that I don't need...maybe this is one of them? Forgive the dumb question. Thanks. And here's the truck, just 'cause I like to look at it. __________________ 79 C10 Cheyenne SWB Daily Driver

07-21-2011, 08:43 PM	#2
youwish2bme Registered User Join Date: Aug 2008 Location: Clayton, NC Posts: 55	Re: Another newbie question....what is this? Its a charcoal canister for fuel fumes. Dave __________________ The toys shoe horned into the garage for the storms.... http://img.photobucket.com/albums/v1...2bme/SIG-2.jpg

07-21-2011, 08:44 PM	#3
lilpoindexter Registered User Join Date: Sep 2010 Location: los angeles Posts: 1,133	Re: Another newbie question....what is this? Some dude axed that not too long ago...its a a charcoal canister...it sucks up gas fumes so your car doesn't stink.

07-21-2011, 08:48 PM	#4
Buzzman Registered User Join Date: Jun 2011 Location: Spokane, WA Posts: 48	Re: Another newbie question....what is this? Huh. Will it be unbearable if I yank it out? Thanks guys. __________________ 79 C10 Cheyenne SWB Daily Driver

07-21-2011, 10:37 PM	#7
Stepper562 Registered User Join Date: Jun 2011 Location: Downey, ca Posts: 262	Re: Another newbie question....what is this? I`m pretty sure he meant "asked" lol....Nice looking rig by the way. Yank it out!

07-21-2011, 11:14 PM	#8
Dan1969 Registered User Join Date: Jun 2011 Location: OK Posts: 76	Re: Another newbie question....what is this? Isn't it part of your smog system as well? I have to get rid of mine, I already took off the other parts that came with it.

07-21-2011, 11:19 PM	#9
Goldfinger Registered User Join Date: May 2010 Location: laurel hill Fl Posts: 645	Re: Another newbie question....what is this? carbon can. you really don't need it, it's mostly for show. just re-route the lines and it's fine. __________________ 1985 C10 Custom Deluxe LWB 305/700r4 [ Goldfinger ] 1999 k3500 crew cab dually 6.5tdi/4l80e

07-21-2011, 11:40 PM	#10
Texasline Registered User Join Date: Dec 2010 Location: San Diego CA. Posts: 20	Re: Another newbie question....what is this? That little black canister is the Charcoal Canister...as was mentioned. It is extra baggage if your state does not require it for smog. In California it IS required. If your state is eminently considering Draconian type laws requiring stricter emission controls, consider keeping it. Shine it up and maybe it will look pretty

07-22-2011, 11:43 AM	#11
azjaeger Registered User Join Date: Oct 2010 Location: Casa Grande, Arizona Posts: 74	Re: Another newbie question....what is this? It's supposed to contain gas vapors from your fuel tank. However, I'd be really surprised if a vapor retention device from 1979 would still be able to retain vapors. Remove it, it won't make any difference in how it runs..but you might want to stash it so if your state goes full greenie and starts requiring OE emission controls on 30 year old vehicles you can hollow it out and put it back on for show.

07-22-2011, 12:56 PM	#13
njlimbaugh Registered User Join Date: Jun 2011 Location: LaFayette GA Posts: 111	Re: Another newbie question....what is this? Mine wasn't connected when I bought the truck, and every time I shut the engine off it off the garage stunk with gas fumes for an hour or more. I put in a new filter pad and connected all the hoses. That took care of the stink. The cannister won't interfere with performance one way or the other.

07-22-2011, 01:17 PM	#14
bigwheel15 Registered User Join Date: Feb 2010 Location: Fort Worth, TX Posts: 727	Re: Another newbie question....what is this? I pulled mine out shortly after getting my truck and I never noticed a difference one way or another. Basically if it bothers you or you want to clean up your engine bay...pull it. If not leave it.

07-22-2011, 06:03 PM	#16
Buzzman Registered User Join Date: Jun 2011 Location: Spokane, WA Posts: 48	Re: Another newbie question....what is this? Hey Veinbar, I'm glad you brought it up, 'cause I'm having a bit of a hard time finding it. The truck was repainted, but from a few dings I can see that they matched the original finish. According to the '79 GM truck color chart @ autocolorlibrary, it's code 25 'brt. blue poly.' I just need a little bit for rust repair (rattlecan?), but I haven't seen '25' anywhere. I'm sure the color was used under different names and codes throught the years, but I'm not sure. It is a nice color, though. Any tips would be appreciated! __________________ 79 C10 Cheyenne SWB Daily Driver

07-22-2011, 08:17 PM	#17
Stepper562 Registered User Join Date: Jun 2011 Location: Downey, ca Posts: 262	Re: Another newbie question....what is this? I`m getting ready to desmog mine...yes I live in california, yes I know smog lows are horrible here. Not if you have a "guy" hehehe. Yank all unneccessary crap out. It`ll look soooooo much cleaner.

07-22-2011, 10:43 PM	#18
cr34t3d_by_d4rkd3n Account Suspended Join Date: Jan 2011 Location: Allen, TX Posts: 188	Re: Another newbie question....what is this? no ones gonna say it? ok I will.....plug the lines if u remove it, not plugging them off will suck dirt and cause bad things, seriously ive removed all of them off every vehicle, but this method works, and this carb likes the suck from the can so it stays....its ur call just remember, worked fine for 35 years.....

07-24-2011, 05:36 PM	#21
KMK454 Registered User Join Date: Jan 2007 Location: USA Posts: 440	Re: Another newbie question....what is this? What was the first year they started putting these in our trucks? __________________ Kurt Instagram: @kurtkphoto 1978 C10 Silverado 1991 Camaro B4C



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07-24-2011, 09:32 PM	#22
Buzzman Registered User Join Date: Jun 2011 Location: Spokane, WA Posts: 48	Re: Another newbie question....what is this? Thanks for all the replies. I will certainly plug the carb. The only thing I'm a bit worried about is keeping the ventilation for the gas tank. As I understand it, these canisters act as a vent for the tank and without a vented gas cap or other vent along the fuel line, there could be some issues. Could anyone elaborate on this? Thanks again! __________________ 79 C10 Cheyenne SWB Daily Driver

07-25-2011, 09:06 AM	#23
njlimbaugh Registered User Join Date: Jun 2011 Location: LaFayette GA Posts: 111	Re: Another newbie question....what is this? If you plug the line from the fuel tank, the tank won't vent and the engine will starve for fuel due to vacuum building up. Just put new lines and a new filter in the cannister. It's there for several reasons, none of which will affect performance.

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