Thread: Tip for a smelly garage!

Tweet

Originally Posted by curmudgeon

Expandtion could flood carb I suppose, contraction just sucks air thru check valve. I need suggestions on a small charcoal canister, maybe for a motorcycle.
Thanks!

Contraction is not your problem, as it's sucking air into the tank to replace fuel burned, or due to decreasing vapor pressure due to cooling. Expansion (or a leak) is what causes the fumes. That vent has to work both ways, so a check valve may seem to fix your problem but is going to pressurize your tank with increasing vapor pressures, especially in the summer. Dave (IC2) already shared his experience in your earlier post, including the fact that the charcoal canister doesn't work for a vented system, and his solution, which was a coil of tubing in the vent routing. Seems to me you have the answer, or at least one that worked for Dave.

Originally Posted by rspears

Contraction is not your problem, as it's sucking air into the tank to replace fuel burned, or due to decreasing vapor pressure due to cooling. Expansion (or a leak) is what causes the fumes. That vent has to work both ways, so a check valve may seem to fix your problem but is going to pressurize your tank with increasing vapor pressures, especially in the summer. Dave (IC2) already shared his experience in your earlier post, including the fact that the charcoal canister doesn't work for a vented system, and his solution, which was a coil of tubing in the vent routing. Seems to me you have the answer, or at least one that worked for Dave.

I have a coil of tubing in my vent line just above my tank, that doesn't seem to help. Someone on the H.A.M.B. suggested attaching a fuel filter w/1/4" fittings to the vent line so the tank could breath. That seems to help, but it's not the cure all.
It was also suggested to run a vent line as high above the tank as I could and create a 180 then back down, kind of like a upside down J trap. I don't see how that would make any difference.
Again, the fuel filter on the end of the vent line does seem to help!
ANY OTHER IDEAS?????

Originally Posted by curmudgeon

I have a coil of tubing in my vent line just above my tank, that doesn't seem to help. Someone on the H.A.M.B. suggested attaching a fuel filter w/1/4" fittings to the vent line so the tank could breath. That seems to help, but it's not the cure all.
It was also suggested to run a vent line as high above the tank as I could and create a 180 then back down, kind of like a upside down J trap. I don't see how that would make any difference.
Again, the fuel filter on the end of the vent line does seem to help!
ANY OTHER IDEAS?????

What type of line runs from the tank to the engine? Some braided tubing tends to "breathe" a bit if it doesn't have the right core materials. I think that's where the odor comes from on mine, using the Russel Pro-Classic hose.

Another thought is that the fumes may be from your engine. If your float level is high you might be dribbling raw fuel into the intake, which will then vaporize and create a strong odor. Any small leak at the carb can cause the odor, too.

Originally Posted by rspears

Contraction is not your problem, as it's sucking air into the tank to replace fuel burned, or due to decreasing vapor pressure due to cooling. Expansion (or a leak) is what causes the fumes. That vent has to work both ways, so a check valve may seem to fix your problem but is going to pressurize your tank with increasing vapor pressures, especially in the summer. Dave (IC2) already shared his experience in your earlier post, including the fact that the charcoal canister doesn't work for a vented system, and his solution, which was a coil of tubing in the vent routing. Seems to me you have the answer, or at least one that worked for Dave.

Thanks Roger for bringing Dave's(IC2) thread up. I went back to re-read it and found I missed the last 2 pages!
Lots of good info in that thread!!
Joe

29project57.jpg29project56.jpg29project53.jpg29project58.jpg29project50.jpgOK! Here is what I have and have done today! Hope the hell it works! I used a puke tank and screened the lines inside and filled it with activated charcoal and attached it to a fuel filter and then on to the curley-q on top of the tank!