Re: Turbo after-run pump

[DeWitt Harrison <de@aztek-eng.com>]

On Mon, 25 Oct 1999 21:20:49 GMT, Phil Payne wrote:
>[ ... ]
>Second - you can't meaningfully test it in circuit.  You can hear it
>hum - but the most common failure mode is the impellor separating
>from the motor shaft.  It hums away all day but no water moves.
>
>You have to take it off the car and watch the impellor when you apply
>volts.

Also, sometimes it works to pinch the inlet/outlet hoses while it's
running and either feel the water motion with your fingers or
hear the pump sound change in response to the load change.

OTOH, a real advantage to removing it is that if the plastic
impeler housing has become brittle with heat aging, it will
probably crumble in your hands as you work with it.

DeWitt Harrison
Boulder, CO
88 5kcstq