Posted By: Moonraker
charcoal canisters - 04/03/12 06:35 PM
Anyone still making these? Dont really need it for functionality really except to prevent vapor locking its more for appearance. Thanks for the help 
charcoal canisters
Posted By: IMGTX
Re: charcoal canisters - 04/03/12 06:43 PM
They are not for Vapor locking.
They are for Vapor Recovery, emission control.
They may not make the OEM ones but every car made today has them so a replacement can be had.
Mine seems to be clogged so I am probably going to replace it just so the wife can't say my car smells like gas fumes.
They are for Vapor Recovery, emission control.
They may not make the OEM ones but every car made today has them so a replacement can be had.
Mine seems to be clogged so I am probably going to replace it just so the wife can't say my car smells like gas fumes.
Posted By: Moonraker
Re: charcoal canisters - 04/03/12 06:54 PM
Quote:
They are not for Vapor locking.
They are for Vapor Recovery, emission control.
They may not make the OEM ones but every car made today has them so a replacement can be had.
Mine seems to be clogged so I am probably going to replace it just so the wife can't say my car smells like gas fumes.
yah I know but if i remove it and plug the line it will vapor lock. The only purpose its really serving me now is for this and cosmetic reasons
really I could do with one the same diameter to fit in the bracket towards the front of the engine and looked similiar.
Posted By: IMGTX
Re: charcoal canisters - 04/03/12 07:00 PM
It shouldn't vapor lock if you plug it. The vented gas cap lets air in but pressure will build up if it is plugged. It may cause a leak.
If emissions isn't a problem then I say remove it and vent the tube to the underside of the fender where it won't potentially drip on an exhaust pipe.
Even if removed it shouldn't leak because the back of the car has a vapor separator and the liquid fuel should get put back into the tank but better safe than sorry.
If emissions isn't a problem then I say remove it and vent the tube to the underside of the fender where it won't potentially drip on an exhaust pipe.
Even if removed it shouldn't leak because the back of the car has a vapor separator and the liquid fuel should get put back into the tank but better safe than sorry.
Posted By: Challenger 1
Re: charcoal canisters - 04/03/12 07:04 PM
My suggestion would be to keep it, but if you decide not to. Instead of plugging the line, connect it to the engine crankcase with a 3 nipple breather cap on the valve cover is one way to do that.
Posted By: burdar
Re: charcoal canisters - 04/03/12 07:14 PM
It shouldn't have a vented gas cap. The tank should only vent through the vapor line. That line can't be plugged.
Posted By: Moonraker
Re: charcoal canisters - 04/03/12 07:29 PM
Quote:
My suggestion would be to keep it, but if you decide not to. Instead of plugging the line, connect it to the engine crankcase with a 3 nipple breather cap on the valve cover is one way to do that.
Yes I would like to keep it. Has anyone else ever "rebuilt" one of these? It seems once you remove the filter on the bottom the charcoal would just fall out. You could replace this with charcoal for aquarium filters and I did find replacement filters for the bottom of the canister. Seems easy or maybe I'm missing something?
Posted By: IMGTX
Re: charcoal canisters - 04/03/12 07:38 PM
Quote:
It shouldn't have a vented gas cap. The tank should only vent through the vapor line. That line can't be plugged.
Most if not all Mopars with charcoal canisters use vented caps. The vents let air in and prevent vacuum in the tank. Pressure (fumes) are released through the charcoal.
Posted By: burdar
Re: charcoal canisters - 04/03/12 08:16 PM
The valve in the vapor separator lets air in and out...on a 72-74 E-body anyway. 
Posted By: burdar
Re: charcoal canisters - 04/03/12 08:18 PM
The filter on the bottom of the canister can be replaced but the bottom of the canister is glued in. I doubt you'll be able to get it off to replace the charcoal.
Posted By: IMGTX
Re: charcoal canisters - 04/03/12 08:44 PM
I didn't know about the glued in Charcoal. That is good to know. Mine is spilling charcoal so it is probably non reparable. Thank You.
I went round and round getting the right parts for my 70 Challenger's Fuel system. They made at least 3 different filler necks and way too many fuel caps for the Challengers (DAMHIK). Drove me nuts.
If you look inside a vented cap you will see a nipple covering a spring loaded valve, on newer cars you may even see the spring.
The nipple under the cap is the vent. Here is a picture of a 72-74 Challenger Vented cap and a 70 Challenger non-vented cap for comparison.
Hopefully it will help.
I went round and round getting the right parts for my 70 Challenger's Fuel system. They made at least 3 different filler necks and way too many fuel caps for the Challengers (DAMHIK). Drove me nuts.
If you look inside a vented cap you will see a nipple covering a spring loaded valve, on newer cars you may even see the spring.
The nipple under the cap is the vent. Here is a picture of a 72-74 Challenger Vented cap and a 70 Challenger non-vented cap for comparison.
Hopefully it will help.
Posted By: Challenger 1
Re: charcoal canisters - 04/03/12 09:03 PM
That's pressure vacuum cap, that's not a vent. Well it is a vent but it won't open until about 1 psi according to my factory service manual. I have one for a 71 and a 74. Both years vent the fuel tank through the line that goes up front, either to the charcol canister72-74? or to the breather on the valve cover like on my 71.
74
71
74
71
Posted By: IMGTX
Re: charcoal canisters - 04/03/12 09:14 PM
Quote:
That's pressure vacuum cap, that's not a vent. Well it is a vent but it won't open until about 1 psi according to my factory service manual. I have one for a 71 and a 74. Both years vent the fuel tank through the line that goes up front, either to the charcol canister 72-74? or to the breather on the valve cover like on my 71.
Well I had the operation right but the terminology wrong. My wife complains about that a lot too.
Posted By: burdar
Re: charcoal canisters - 04/03/12 09:26 PM
I'm going to have to take a look at my original 73 gas cap. That valve in the center doesn't look familiar.
Posted By: Moonraker
Re: charcoal canisters - 04/03/12 11:41 PM
This is for a 74 A body has anyone ever replaced an old canister with a newer unit?
Posted By: burdar
Re: charcoal canisters - 04/04/12 01:21 AM
It seems like every year had a specific canister. Some with three nipples and some with only two. You could try cutting the bottom out of your original one. You'd have to come up with some way to retain the new charcoal though. The bottom is hidden anyway so you might be able to fab something.
Posted By: Commando1
Re: charcoal canisters - 04/04/12 01:43 PM
Quote:
Anyone still making these?
Lost count how many I have thrown away. The last one just 2 days ago.
Throw yours away and drill an 1/8" hole in your gas cap.
Posted By: IMGTX
Re: charcoal canisters - 04/04/12 04:48 PM
Replacing it with a newer unit shouldn't be a problem.
There are many on the bag. Most new ones are boxes and may be easier to hide.
http://motors.shop.ebay.com/i.html?_nkw=charcoal+canister
Some newer canisters are nearly identical to Mopar canisters of the day which leads me to believe they were probably made by the same company.
GM http://www.ebay.com/itm/270946231006
Nissan http://www.ebay.com/itm/180855366667
Jeep www.ebay.com/itm/130673142627
Old Mopar www.ebay.com/itm/150631341834
All the canisters should be labeled (Purge) (Vent) etc. IT shouldn't be too much of a problem to plum a new one in place of an old one and just cap the unused ports. My 73 uses the same can as my 74 but my 74 has no bowl vent so the port had a cap from the factory.
There are many on the bag. Most new ones are boxes and may be easier to hide.
http://motors.shop.ebay.com/i.html?_nkw=charcoal+canister
Some newer canisters are nearly identical to Mopar canisters of the day which leads me to believe they were probably made by the same company.
GM http://www.ebay.com/itm/270946231006
Nissan http://www.ebay.com/itm/180855366667
Jeep www.ebay.com/itm/130673142627
Old Mopar www.ebay.com/itm/150631341834
All the canisters should be labeled (Purge) (Vent) etc. IT shouldn't be too much of a problem to plum a new one in place of an old one and just cap the unused ports. My 73 uses the same can as my 74 but my 74 has no bowl vent so the port had a cap from the factory.
Posted By: Moonraker
Re: charcoal canisters - 04/04/12 04:50 PM
Quote:Quote:
Anyone still making these?
Lost count how many I have thrown away. The last one just 2 days ago.
Throw yours away and drill an 1/8" hole in your gas cap.
Thats just it I dont want to throw it away I would like to keep it in there for a more stock appearance. Guess I will try to clean this one up a little and see if i can "rebuild" it somehow. I found some canisters that look similiar but they dont give dimensions so I have no idea if they fit in the stock bracket or not.