I'm not sure about that but the servo cover on the side will keep on pumping it out if there is a leak there. Underneath that cover, there is a very thin "o" ring that has a square cross section to it. If that gets nicked or is not in the correct postion it will leak. As a matter of fact, if you have had that cover loose, it is very difficult sometimes to get it to seal properly unless you put in a new one. I've always had to get a new one because they tend to squish out of shape. If you're not 100% sure it is coming out of the vent you might check there.