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2nd attempt. Thanks Arthur.
-----Original Message-----
From: John Edwards <edwardsj@bigpond.com>
To: Military Vehicles List <mil-veh@skylee.com>
Date: Tuesday, 25 January 2000 9:11
Subject: GPW/MB AC Fuel Pump - vapour lock.
>Hi there MV listers,
>
>Here's a little something I found out today that may (I stress MAY) have
>answered a time long issue with GPW/MB engines here in Australia, or other
>countries with similar warmer/hot climates (>30 deg centigrade let's say).
>
>Now vapour lock is where the air temp around the engine gets so hot that
the
>fuel, bubbles, vapourises or just plain doesn't get to the carby. So the
>jeep won't start, and the engine will need to cool down before you get any
>chance to move again. It usually happens here on a really hot sunny day
>after a long run.
>
>As GPW/MB readers will know, their fuel pump is made by AC. Now I can't
>comment for the USA or other countries, but many of our post-WWII cars here
>in Australia also had AC fuel pumps. Some of these post WWII vehicles came
>with a glass bowl cover for the fuel pump.
>
>Now here's the catch. With my new glass AC fuel cover on, I can see when
the
>fuel comes in, fills the chamber and eventually gets to the carby. Now from
>what I can see in the chamber, the fuel level isn't much above the gauze
>filter insert. I have to do further tests to be sure, but it would appear
>that if the engine gets THAT hot, the remaining air pocket would probably
>expand & bubble to a point where no fuel, enters the gauze filter and
>therefore to the carby.
>
>I haven't got a fix for it yet, but I thought other jeep owners might like
>to know of it if they get these symptoms. Get a glass bowl cover & try it.
>
>Rgds,
>
>John - Sydney Australia
>
>
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