[Rhodes22-list] Auto Gas Tank Vents

[Rik Sandberg]

Bill,

There is a one way valve in the vent system. Let's air in but not out. This is why, many times there is pressure in the tank when you open the cap. Having a little pressure in the tank keeps the evaporation to a minimum. Many carrs used to have a filter on the vent line that somehow trapped the gas vapor and supposedly put it back into the fuel system. I don't really know how this worked or if they still do it that way.

Rik

-----Original Message-----
>From: Bill Effros <bill at effros.com>
>Sent: Jun 28, 2006 9:32 AM
>To: R22 List <rhodes22-list at rhodes22.org>
>Subject: [Rhodes22-list] Auto Gas Tank Vents
>
>How does air get into automobile gas tanks to allow the fuel to exit?
>
>Bill Effros
>
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