No, if it leaks when only half full you may have a bad line on top of the tank or a bad seal where the filler neck goes in. The vent system is designed to capture all fumes from the fuel, so it is basically a sealed system. Try using a flashlight and a mirror to see if you can locate the source of the leak on top of the tank. Otherwise it may need to come out to find it.
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Wednesday, March 17th, 2010 AT 8:23 AM