Help with charcoal canister removal...Pretend I'm stupid...

[hardwaycooke]

I'm new to this truck and am starting my "water rebuild". New everything to go with water flow. Noticed this charcoal canister and read I can remove it with no problems.

Can someone tell me/show me what to do with the lines...EACH one to clean up the bay??

One hose comes from driver side valve cover vent to canister.(do I plug this or what)
One hose from canister to base of carb.(ditto)
One hose from canister to gas tank along frame. (ditto)

I have a 71 original setup.

Thanks

[hardwaycooke]

Originally Posted by hardwaycooke

I'm new to this truck and am starting my "water rebuild". New everything to go with water flow. Noticed this charcoal canister and read I can remove it with no problems.

Can someone tell me/show me what to do with the lines...EACH one to clean up the bay??

One hose comes from driver side valve cover vent to canister.(do I plug this or what)
One hose from canister to base of carb.(ditto)
One hose from canister to gas tank along frame. (ditto)

I have a 71 original setup.

Thanks

ok..no responses yet, but it is late. I've been reading and sounds like I just cap off the 2 lines and no one seems to have a definite on the vapor line.

Some leave loose under hood(fumes???)
Some put a filter and leave loose(fume smell??)
Some cap at tank and use vented cap(read caps dont work great)

can I cap off 2 and just leave vapor line hooked up to can? Just want rid of lines crossing bay. Can paint up can and make look decent.

Any thoughts??

[magwakeenercew2jh]

Originally Posted by hardwaycooke

ok..no responses yet, but it is late. I've been reading and sounds like I just cap off the 2 lines and no one seems to have a definite on the vapor line.

I have a '68 cab and '71 chassis. I took the vents and gas tank out of the '71 and refurbished them. I use a vented gas cap.

I simply pulled the canister and left one vent line open that's attached at the frame near the fuel pump (although I don't have my FP there). The other line that terminated there (for the canister),
I extended with fuel line up to the position shown so I could blow air into the tank.....

Don't know what gave me that brilliant idea...Except that I did that while I was figuring out my venting/gas flow situation...Thought I had a fuel delivery problem and had the tank "hot dipped",
blew out lines that weren't clogged, and finally put on an electric fuel pump.

Turns out it was an electrical problem..."Duuuuh". HEI module.

Anyway, I left the lines open. The top one is going to stay there (arrow). I only wrote that to tell you that is what *I* did. Possibly, you can simply disconnect the canister and just leave the lines down low.
I think I like that one high...just thinking that if there is any fume venting....and I smell none....that any fumes would be in the airflow up higher....But it probably is, "six of one and a half dozen of the other".

Also, I would suppose with a vented gas cap, you could just cap 'em off.

[SCHRUMGMC]

What is that thing for anyway ?

[Andy4639]

Plug them. The one coming from the tank is for purging the tank so the cab doesn't fill up with gas fumes. You can take the canister completely out and leave the line under the truck.

The canister was full of Charcoil to purge the cab out from gas fumes and smog controlls for the engine in 71.

Original GM fuel vapor charcoal canister used to help cut down or eliminate fuel vapors. Essential part of the fuel and emissions system

[SCHRUMGMC]

so if I was to open mine, all i'd find would be is old Charcoal ?? Ha !!!...How do you open one

[Andy4639]

Best I remember is they are plastic. You have to cut them open I think. Never had one open before.