[Vwdiesel] pump numbers

[Bart Wineland]

Thanks Scott. It is the plastic housing you describe that holds the little 
wafer that came apart and will not seal again.   When I parked the car in 
the garage tonight and shut the engine off I could hear it hissing. It 
leaks fuel out pretty good when the engine is running and lets air in when 
I shut it off. It makes starting the car a real chore. I probably whacked 
it at some point when swapping the engines.  In addition to what you 
describe mine has another device that attaches to the filter bracket. I 
think it is a heater since it has power running to it but is not plumbed 
together in anyway to the filter since I've owned the car.

Bart

At 06:32 PM 12/10/2004 -0600, you wrote:



>  >I have a old style fuel filter housing
> > I want to install instead of the newer style. The newer style has an
>extra
> > line that I don't know what to do with but will figure it out.
> >
> > Bart<<
>
>     The newer style incorporates a thermostatic wafer in a plastic
>housing that runs return fuel from the pump back through the filter at
>temps below 50F.  IIRC, two of the fuel lines are coupled to the
>housing, which sits atop the filter.  Over time, the plastic gets
>brittle and cracks or breaks when you try to tighten the line clamp.
>     The new style doesn't become apparent until the thermovalve
>housing cracks and leaks, or when you find out the filter is more
>expensive and the housing a dealer-only item, or when the temperature
>gets below about 10F.
>     At cold outside temps, you get warm fuel to the pump pretty
>quickly, rather than the cold stumbles for several minutes.  Replacing
>the newer style with the old involves a bit of re-plumbing the extra
>lines, and does save money and increased risk of leaks, but a couple
>of mornings at -10F made me a believer in the newer style.
>     HTH,
>     Scott Kair
>
>
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