temp gauge behaviour after thermostat replacement

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Thread: temp gauge behaviour after thermostat replacement

  1. #1

    temp gauge behaviour after thermostat replacement

    Hi guys.
    My Tid was leaking about 0,1L of coolant for every 5000km. Even though it was not that problematic, but I had to get it fixed. During last maintenance, a few days ago, I've asked to check it and the problem was the thermostat, which was replaced. Somehow even before driving the car I thought about this, and it happened. The temperature gauge (which didn't have a dead zone) now reads always at 9 when at temperature. I really liked the old way, as it provides better information about how the car really is. Was this automatic when the thermostat was replaced? Can I do some calibration with OPCOM? I read that there are 5 temperature settings for Tech2, not sure if my mechanic (bosch) has the tools for this.
    Thanks and regards.

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  3. #2

    Re: temp gauge behaviour after thermostat replacement

    Hello Dave , where about is the gauge when the engine is off ?
    Is it reading zero ? Or is it halfway up the gauge ?
    Sorry for the question, but the way I'm reading it , is confusing me .
    MSD REGISTER 26101 NOCTURNO-BLAU-MET

  4. #3

    Re: temp gauge behaviour after thermostat replacement

    Quote Originally Posted by lizzard-t View Post
    Hello Dave , where about is the gauge when the engine is off ?
    Is it reading zero ? Or is it halfway up the gauge ?
    Sorry for the question, but the way I'm reading it , is confusing me .
    Thanks for the reply. Yes, on zero. My gauge previously reflected the accurate cooler temperature.
    I found on another forum:
    "(1) low temp upper 50 degrees C
    (2) horizontal low temp 83 degrees C
    (3) horizontal high temp 115 degrees C
    (4) high temp low 129 degrees C
    (5) temp gauge horizontal offset 0 degrees C.

    I got to play w/a Tech 2 at a tech session, and had the same settings on mine. I made the following changes to take out the dead band:

    2) changed Low 83 to 90
    3) changed High 115 to 90 "
    I was wondering if this is possile to do with an OpCOM, which I don't have at the moment.
    Thanks

  5. #4

    Re: temp gauge behaviour after thermostat replacement

    Hello Dave ,opcom is just a diagnostic tool you cannot do as much as tech2
    but interesting about the temperature gauge settings.
    MSD REGISTER 26101 NOCTURNO-BLAU-MET

  6. #5
    Saab Afficionado
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    Re: temp gauge behaviour after thermostat replacement

    Opcom is useful but only for the Z19 engines I doubt if you can make those changes........you can code injectors and force regens and get all the engine read backs
    So useful for those things alone.
    I have a Tech2 and have never seen any bias setting for the Thermostat.
    I suspect there are some differences between the actual stat opening temps themselves and the different vendors ie 96/97/98/99 etc which may lead to some variations on the gauge
    after the housing is replaced.
    In the end it doesnt really matter as you should only worry if it starts to head north past the mid point.

  7. #6

    Re: temp gauge behaviour after thermostat replacement

    Quote Originally Posted by lizzard-t View Post
    Hello Dave ,opcom is just a diagnostic tool you cannot do as much as tech2
    but interesting about the temperature gauge settings.
    I know, right? But from what I'veen asking around I thought more people would have these settings, like I had. I'll have to wait a while for my next Tech2 visit now.
    Thanks!

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