Allen,
Since you have no replies yet, I'll go "w-a-y" out on a limb here, and
give you info as "I" understand it to be... Don't mean it's correct, but I
think so... Maybe...
You need a "Vented" cap.
I may be experiencing a "Senior Moment", but I seem to recall my "now" 16
year old son returning from kindergarten with an "A" on a crayon project
describing how the sealed fuel systems were designed as a part of emission
controls gobbledegook to create tank vacuum to aid in returning excess
unburned fuel and fumes to the tank with the advent of pressurized fuel
delivery systems... I thunk...
The principle as I understand it is similar to the wife opening the bedroom
window when you pass gas in your sleep, or keeping it shut so you inhale it
and absorb it again through your lungs for later use, or suffocate,
whichever comes first. (After she departs, closing the door behind her,
naturally...)
Did I throw in enough clarifiers there?
You may not be experiencing any trouble due to a loose, worn or ill fitting
gas cap gasket allowing air in and equalizing tank pressure.
Kevin P.
'59 Apache 38/NAPCO (Extremely Well Vented...)
-----Original Message-----
From: owner-oletrucks@autox.team.net
[mailto:owner-oletrucks@autox.team.net]On Behalf Of Allen Coblentz
Sent: Thursday, February 24, 2000 8:08 PM
To: oletrucks@autox.team.net
Subject: [oletrucks] non-vented gas cap/tank
I asked this question a couple days ago during the discussion on vapor
lock.....no answers so far. It was said that a non-vented gas cap could
cause a vacuum capable of crushing the gas tank. My original cap is
non-vented........should this be replaced with a vented style? ( I
haven't experienced any problems driving my truck as a daily driver.)
What year did Chevy go to the vented fuel system......and why?
Thanks again, Allen
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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