Re: fan's effect on water pump?

[Caxambu@domain.elided]

In a message dated 2/19/02 10:41:22 AM Pacific Standard Time, Andrew Watry 
writes:

>  In the ongoing discussion of horsepower mods for four-cylinder cars, it was
>  mentioned that the pump-driven fan, in addition to consuming horsepower, 
was
>  a strain on the water pump. Why is that?  It's not because of the fan belt,
>  because with a stock water pump, you have to use the belt to drive the pump
>  regardless of whether you have a fan.  Does the air blast on the fan's
>  blades exert undue pressure on the water pump bearings or seals?

If the fan is not perfectly balanced and radially concentric it would 
transmit a vibration along the water pump shaft to the bearing at higher 
rpms. Like an out of balance tire/wheel.

--Caxambu
1969 Spider 1750, Pusher electric fan

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