This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
Most consider it essential because it safely handles fuel fumes, which are explosive for gasoline. To delete it means that gas fumes would exit fuel system under your hood or bonnet in hot weather because that is where the open end of the fuel tank vent tube is now. That can be quite a hazard in summer....actually anytime.
i'm getting ready to this, out of curiosity, what prompted you to take it on? Only symptom I have is occasional whooshing at the gas cap and maybe a slight fuel smell. But I suspect I may be running rich, am working on exhaust issues, and am baselining anyway so seems like a good idea for a simple replacement.
I hate to say this, but with the high ambient temperatures we are experiencing across America right now. Combined with the ethanol blended fuel that many Mud members are required to run by their state, or the EPA during the summer months. Those two items combined can make it almost impossible to eliminate all "whooshing" of fuel vapors, even with a charcoal canister system that's working perfectly.
Sorry for the late response. I had the hiss/whoosh when opening the gas cap and smell of fuel escaping when I would do that. My previous 80 had the gas tank collapse due to pressure for similar reasons. It's potentially dangerous to have that pressure build up without a release, that's essentially what the vapor canister is for, capturing vapor of excess pressure build up. Old rigs used to let it go to the atmosphere, but to help the environment the charcoal canisters are used. Once they clog up, they don't let the pressure escape.
Thanks for the response, that does sound dangerous! I replaced it with the VC 120 last week and haven't had the pressure at the gas cap on a couple drives. The smell also seems to be gone. I'll probably change the two hoses as well since they're pretty rigid after 24 years.
It 's been my experience that when a gas tank collapses that's caused by a Vacuum* being pulled on the tank, not pressure. If a gas tank is over pressurized, it will expand until it ruptures at one of it's seams, cracks, blows off one of the tanks connecting hoses, or blow liquid fuel or fuel vapor out of the filler neck when you open the gas cap.
not a direct reply to this comment.
)
I have been reading through a lot of these threads and thought of rebuilding or building a new evap / charcoal cannister, but the valve and distinct pressure settings in them made me rethink trying to build a new one. I'd love to design a new one but no time so here are the options:
It worked flawlessly!!! Not a single issue. Here is my response in another thread: Can you still purchase an OEM charcoal canister (Denso Vapor Canister)? - https://forum.ih8mud.com/threads/can-you-still-purchase-an-oem-charcoal-canister-denso-vapor-canister.1159655/post-14744657
