The normal procedure is to put a thermostat in the oil line to the
cooler. It is always partially open to measure the temperature but opens
fully as the temperature reaches the specified range.
Many GM cars have little thermostatically controlled fans, unlike to VW
the sensor is just clipped to the steel fan support frame. (VW is in the
radiator with the temp sender).
I don't know the range of these thermostats but a hair dryer and a
thermometer will be enough to test them if you can't find the individual
specifications.
My Mazda RX7 oil cooler is simply mounted in the air flow under the van
and I've never had an overheating problem since I installed it (it has a
148 degree thermostat).
Before I went out and added fans and fan controllers I'd test the cooler
as is but with the oil flow regulation thermostat (Bus Depot has them).
If you are running an Air Conditioner you can hook your fan motor power
to the same fan controller that turns on your A/C fan.
The same goes for controlling the fan if you have a Waser Boxer, hook it
to the radiator fan controller.
Electrical limitations are in effect so a relay may be necessary.

Stan Wilder

On Fri, 20 Dec 2002 10:38:00 -0500 80 Westy Pokey <pokey@VANAGON.ORG>
writes:
> OK, I bought an oil cooler (ZAP-11701):
>
> http://www.bus-boys.com/oilcoolingremote.html
>
> Anyone know where I can get a thermostat controlled fan for
> it?
>
> Thanks,
> Chris
>
>

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