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Re: Fuel cap tight. Posted by Saana88 [Email] (#207) [Profile/Gallery] (more from Saana88) on Sun, 27 Jan 2008 13:43:12 In Reply to: Fuel cap tight., Paul Clifton, Sat, 26 Jan 2008 18:34:27 Members do not see ads below this line. - Help Keep This Site Online - Signup |
It's cold. Your application of silicon on the rubber gas cap seal should help you out. Remember what happens to rubber door seals in very cold weather? Same phenomenon. Be sure the outside edge of the fuel filler is clean, too. Sometimes a drop of whatever gasoline additives are in use in your state/province at this particular time of year at that station can drop on there, eventually evaporate, and leave sticky goo, which will hang on to the seal on your fuel cap.
900s use a non-vented fuel cap. (If it leaks, it can give your car vacuum leak syndrome, as my parents found out in 1998.) The evaporative emission canister and its one-way valve ensures that as the fuel level in the tank goes down, some air can go back in to replace it. What amazing technology! You wouldn't believe the tricks I had to play in the summer on lots of American cars when I worked at a full-serve station. I couldn't believe the Chevy solution: put a gas cap on there that vents, sometimes violently, with the first quarter-turn counterclockwise. All this because we can't put (gasp!) a vent line on the fuel tank.
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