| Re: [GMCnet] Fuel tank Sending Unit [message #76828 is a reply to message #76816] |
Tue, 16 March 2010 11:53   |
GMCWiperMan
Messages: 1248
Registered: December 2007
Karma:
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Senior Member |
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Certainly some fuel moves into the vent lines, but only up to the level of
the highest fuel level. That probably never approaches the height of the
liquid/vapor separator; the only time that should come into play is during
filling, since the fill tube does go above the separator.
If you look at the last photo, you'll see that on a downhill, the upper rear
of the front tank contains trapped air only in the uppermost corner; in
actuality, that corner should extend almost down to the center of the tank,
where the vent line allows air to escape. The only diminution of that
volume should be from slight compression of the trapped air.
JMHO,
Ken H.
On Tue, Mar 16, 2010 at 10:03 AM, Mike Miller <m000035@gmail.com> wrote:
>
>
> GMCWiperMan wrote on Tue, 16 March 2010 06:03
> > Gene,
> >
> > I've got a question about the last drawing, showing the Aux tank almost
> > completely filled when going downhill: With the vent line almost
> centered
> > fore and aft on top of the tank, won't the absence of a vent behind that
> > point keep the gas from filling much above that level?
>
>
> I am not Gene, but I'll take a shot at this answer.
>
> It puts fuel into the vent lines. Probably why they put int a fuel/vapor
> separator. Other than when you first top off, it probably doesn't happen
> that often. (How many have driven around with bad gaskets around the fuel
> senders?) It would take a pretty steep hill.
>
...
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