Hi Thomas:
The fan itself probably causest the reduced cooling when it's off. If
probably freewheels which interrupts air flow through the rad. In
addition, the motor would block a fair amount of core surface.
John McEwen
>I replaced the engine-driven cooling fan on the 'B with an electric
>version. There is only about 2" of room behind the radiator, so I had
>to mount the fan in front (pushing air through the radiator).
>
>I would have thought that @ 70 mph, there would be enough air moving
>across the radiator to keep the engine cool. If the fan is off, the
>temp guage rides halfway between 'N'ormal and 'H'ot. With the fan on,
>it rides right at 'N'ormal.
>
>Anyone want to guess why?
>
>FWIW - I have a dash mounted switch that turns the fan on/off.
>
>
>Thomas James Pokrefke, III
>1970 MGB
>pokrefke@ocean.st.usm.edu
>http://ocean.st.usm.edu/~pokrefke
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