Re: HELP!!! Hole in evaporation tank in trunk (archive)

Thanks guys. I plugged the hole and the gas smell seems to be gone. I don't know why a previous owner would drill a hole in that tank, but regardless, the problem is now fixed. Thanks again for your help.

Ben Kraus
Chicago, IL

There is not supposed to be a hole in the tank. The tank is for storage of vapors only and any liquid fuel that condenses should drain out of the bottom hose back to the gas tank. Theoretically the tank could be removed if you plug all the lines, it is an emissions control device. Plugging the hole should solve your odor problem.
I guess we can assume you've never smoked in your car...

I have had CHRONIC gas odor problems in the trunk and cockpit ever since I bought my M5. I have checked the tank, and fuel lines and everything looks OK. Finally, I looked at the grey evaporation tank in the trunk just over the right-rear shock tower. Does anyone know what this does? It seems to be empty, BUT IT ALSO LOOKS LIKE SOMEONE DRILLED A HOLE IN THE TOP OF THE BOX. Right next to the "US" stamp. This is where fumes seem to be coming out of. Is this correct? Is there suppose to be a hole in the box? Why three hoses into the box and one hose out of the box? Where do they go? None of the manuals I've read explain what this box does. Can someone please shed some light on it and whether or not there is suppose to be a hole in the box.

THANKS,
BEN KRAUS
Chicago, IL
E28 M5

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