Hi,

The caps are pressure sensitive since the caps are check when the car has a smog
check. There is a line that runs to the engine compartment from the gas tank to
a vapor recovery container. I believe that a vaccuum hose pulls the vapor into
the engine.

Lance

--- In thechemistrycluster@yahoogroups.com, John W <JohnWW@...> wrote:
>
> The caps of the petrol tanks usually have a very small hole in them somewhere,
often concealed, for the purpose.
>
> John W.
>
> --- On Thu, 2/7/09, Antonio <galopus@...> wrote:
>
> From: Antonio <galopus@...>
> Subject: [The Chemistry Cluster] vapor escape from gasoline stragetanks for
car
> To: thechemistrycluster@yahoogroups.com
> Received: Thursday, 2 July, 2009, 1:49 PM
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> I woul also like to know if the gasoline storage tank for cars has any
venting system. I know it should have, but where is it located?. Tanks
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>