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RE: empty fuel filter

To: "MGs" <mgs@autox.team.net>
Subject: RE: empty fuel filter
From: "Dodd, Kelvin" <doddk@mossmotors.com>
Date: Wed, 20 Jan 1999 12:39:16 -0800
Sorry.  I don't have the originator of the question.

        From my experience (FME) the "air" in the fuel filter is normal.
The fuel flow is unaffected by the air trapped in the filter.  The "pusher"
electric pump in the B is not susceptable to vapor lock the way the
mechanical suction pumps in the 1500 Mid. are.  If you are in doubt, trying
disconnecting the outlet hose.  I suggest you will only do this once,
particularily if smoking.  The pressurized fuel lines to the carb. are not
sensitive to underhood heat, as any vapor is quite happy being pushed
through the float valves to atmosphere.
        Sucking vapor is a very different scenario as any Midget 1500 owner
on a hot day in traffic will tell you. 

Kelvin. 

> -----Original Message-----
> From: Lonn Howard [mailto:hoops@owt.com]
> Sent: Wednesday, January 20, 1999 12:23 PM
> To: MGs
> Subject: Fw: empty fuel filter
> 
> 
> >Paul,
> >
> >the "air" in the filter is more likely to be petrol (gas) 
> vapour in the
> >line. By the time you are out of the car, the area under the 
> bonnet (hood )
> >>has heated up the filter enough to boil away the fuel. In 
> later B's ,
> where
> >the fuel line to the front carb runs to the front float 
> chamber first, the
> >filter is usually fit in just before it enters the front 
> float chamber.
> It's
> >a much cooler spot.
> >
> >Durinx Willy
> >73 BGT "Ruth"
> >
> >
> I'm not sure I agree.  If the fuel was vaporizing in the 
> manner suggested
> then most of us would have problems with vapor-lock.  I 
> wonder if maybe the
> fuel pump is sucking air.  Try blowing your system out, then 
> plug the pipe
> at the tank end and pull a vacuum at the outlet of the pump 
> and see if the
> system will hold a vacuum.  Just a guess, but I bet not.
> 
> Lonn Howard
> '70 TR6 -mine
> '71 TR6 -in my garage, therefore it's mine (dad might disagree)
> '70 MGB GT -mine, mine... all mine
> '89 Saab Turbo Convertible -hers
> 
> "We are but temporary custodians with an obligation of preservation."
> 
> 

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