afterrun coolant pump

Gsidman gsidman at
Fri Oct 2 08:35:22 PDT 2009

On the '91 200 20v the coolant pump and the fan should come on couple of
minutes after shutting off the engine, and both should shut off
automatically after a few minutes.  Otherwise the pump should not be running
at all when the engine is running. Apparently it takes a couple of minutes
for the heat soak to build to the point that it trips the sensor. 

I have installed an over-ride switch with a timer relay so that when things
are really hot I just flip the switch when I shut off the engine, and the
fan and pump come on immediately and go off after five minutes. 

George Sidman
Chairman & CTO
WebLOQ, Inc.
2801 Montery Highway
Monterey, CA  93940
Office     831 372-2600
Mobile    831 601-1776

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