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Re: [T3] Fuel Issues - Overheating?

On 4 Jul 2006 at 13:43, knowonelse@sbcglobal.net wrote:

> I checked the clear fuel filter when this happened and I
> found that there was no fuel in the filter. The engine was
> definitely hot as I couldn't hold on to the oil dipstick and
> it just plain felt hot in there.

Normal oil temps are close to boiling, which is WAY too hot for your 
hand. What you're seeing may be completely normal.

> I suspect that it got hot enough to expand the fuel in
> the filter creating a vapor situation where the mechanical
> pump wouldn't pump the vapor. It needs a liquid to be
> able to function properly.

If your tank is more than half full, the fuel level in the tank is 
high enough that no suction is necessary to pull gas from the tank, 
hence vapor lock won't happen.

The way the little plastic filters are made, they almost never appear 
to have much gas in them. This is simply due to the way their inlets 
and outlet ports are arranged. This tends to be a very common red 
herring. OTOH, there might actually be other problems that are 
keeping you from getting fuel.

> I have none of the thermostat components, so they can't
> have failed closed. What are some other things I can
> look for causes of overheating?

Are you sure you don't still have the flaps? If the shaft is still 
there then you probably still have the flaps. Most engines that lack 
the thermostat and linkage still have the flaps.

Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA

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