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Date: Sun, 10 Dec 2006 16:57:38 GMT
From: "bozo" <bozonospam.net>
Subject: Re: 82 Degree Thermostat in Winter?


You don't say whay year your 9000 is, but one thing to keep in mind re. your temperature guage reading is that because at least some models of the earlier years of 9000's tended to run hot under some conditions, which apparently resulted in a lot of unnecessary back-to-the-dealer trips from concerned owners, a revision was made that so that the coolant temperature sensor feeding the temperature guage was run first through the trionic engine managment computer - the guage reading is not a 'true' temperature reading on the later models, it is just what the computer wants you to know. I don't know when this change happened (I used to own a '91 9000Turbo and it seemed to run fine to me re. temperature, but it may have been the same system) but I do know that it is managed that way on my current '95 Aero - as I learned when the sensor failed - the coolant temp. sensor that feeds the guage (evidently there are several other coolant temp. sensors used by the system for other purposes) is located in the head near the throttle body and it is also the sensor that controls the electric fan for the radiator - it runs through the trionic engine management computer before doing either. <Echo088880nospaml.com> wrote in message news:1165760975.295084.21900nospam000cwy.googlegroups.com... > The 9000 I bought a couple of months ago has a 82 degree thermostat in > it. I'm in Vermont, where we'll probably have some sub-zero F days this > winter. So far I've driven in 5 degrees F with everything seeming > pretty normal, although the temp needle rides about a quarter-inch from > the blue bottom when highway cruising. Is there a mechanical reason I > need to switch to a higher temperature thermostat for the winter? >

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