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On 20 Dec 2005 at 10:34, Constantino Tobio wrote: > Jim Adney wrote: > > >Unless there's some defect in your system, the tank is completely vented and no > >pressure buildup is possible. > > > Well, if the liquid is vaporizing at a higher rate than the vent will > allow, then the pressure would be higher than atmospheric- even if > marginally so. True, but then think of what would happen when you removed the gas cap. If the pressure had allowed the gas to warm up past its atmospheric boiling point, then we should occasionally see some rather explosive boiling when we do this. Also consider what should happen to those of us (not me) at high altitudes. Their fuel should boil at even lower temps. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~