thermostats

[isham-research.freeserve.co.uk at pop.pol.net.uk]

> I too, am of the understanding that engines are desgined and controlled to
> work in a narrow band of temperatures...that is why we have mechanical
> thermostats to help RAISE the temperature of the coolant to what the
> designer wants (cold days, cold starts, etc.).  The thermostatic switches
> on the fan motor circuit are set to LOWER the temperature of the coolant to
> what the designer wants (hot days, slow travel, A/C use, etc.).

All of the 10V I5 turbos have a multipin temperature sensor on the head
water inlet that tells the ECU to reduce boost if head temperatures are
higher than Audi intended.

--
 Phil Payne
 UK Audi quattro Owners Club
 Phone +44 7785 302803  Fax +44 870 0883933