Re: [Chrysler300] Gas Tank Pressure!! - reply

["Ron Waters" <ronbo97@xxxxxxxxxxx>]

What would be the result of putting a vented cap on a tank that's already
vented ?

Ron

----- Original Message ----- 
From: "John J. Hertog" <crossram@xxxxxxxxxxxxx>
To: "'Ron Waters'" <ronbo97@xxxxxxxxxxx>; "'Michael Reed'"
<mrreed@xxxxxxxxxxxxxx>
Cc: <Chrysler300@xxxxxxxxxxxxxxx>
Sent: Sunday, July 23, 2006 7:59 AM
Subject: [Chrysler300] Gas Tank Pressure!! - reply


> Hi Mike,
>
>
>
> 300F's use a NON-VENTED  gas cap, as the tank is internally vented thru a
> vent tube.   Vented gas caps are for tanks that are not otherwise vented.
> However, the 300F does have a vent tube and something must be wrong in the
> venting department if there is any pressure, be it positive or negative
> pressure, being built up inside the tank !
>
>
>
> I suggest you look at your 1960 service manual, page 27 of the Fuel
System,
> fig.40. ;  it clearly shows the venting system.
>
>
>
> Mike, I have no idea why you should end up with positive pressure in your
> tank.  That is just plain weird.  Maybe some other list member will have
> some idea as to what THAT is all about.
>
>
>
> However, I do suggest that you check out your tank venting system. If you
> get under the car, you will see (or should see), on the driver's side of
the
> gas tank, that there is a metal tube that runs the length of the tank,
from
> the rear by filler neck, to the front of the tank.  It terminates by the
> left side strap that holds the gas tank in place, and then there's a short
> piece of rubber hose that connects it to another short piece of metal
tubing
> that attaches to the underbody of the car, close to where the rear shock
> absorber mounts to the body.
>
>
>
> You should be able to remove the gas cap, and then blow air through that
> venting system backwards - perhaps something is plugged up or clogged.
>
>
>
> But I am mystified as to why you'd have positive pressure in the tank.
>
>
>
> John Hertog
>
> Sag Harbor NY
>
>
>
>
>
>
>
>   _____
>
> From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
> Behalf Of Ron Waters
> Sent: Sunday, July 23, 2006 12:45 PM
> To: Michael Reed
> Cc: Chrysler300@xxxxxxxxxxxxxxx
> Subject: Re: [Chrysler300] Gas Tank Pressure!!
>
>
>
> Is this why you would need a vented gas cap ?
>
> Ron
>
> ----- Original Message ----- 
> From: "Michael Reed" <mrreed@cablespeed. <mailto:mrreed%40cablespeed.com>
> com>
> Cc: <Chrysler300@ <mailto:Chrysler300%40yahoogroups.com> yahoogroups.com>
> Sent: Sunday, July 23, 2006 6:25 AM
> Subject: [Chrysler300] Gas Tank Pressure!!
>
> > My "F" is experiencing something I find odd (and a bit disturbing),
Hoping
> to find an answer from my fellow 300 owners.
> >
> > I stopped at a gas station about 5 miles from home yesterday to purchase
> some gasoline. When I twisted the gas tank cap to remove it, there was
> enough pressure in the tank to almost blow the cap out of my hand. I put
> about 6 gallons of gasoline in, and drove home. When I got home I removed
> the cap again, and again there was already a significant amount of
pressure
> in the tank. This has happened at least one other time this year, and a
few
> times last year - but this doesn't occur every time I remove the cap
> immediately after driving (short or long distance).
> >
> > I could understand if there was a vacuum in the tank -- but not
pressure!
> And after only 5 miles!
> >
> > Any ideas, anyone?
> >
> > Mike Reed in beautiful Lake Odessa, Michigan
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
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> >
> >
> >
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> >
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>
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>
>
> [Non-text portions of this message have been removed]
>
>
>
>
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>



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