96 SLS - Does this gauge picture indicate Hot ?
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 96 SLS - Does this gauge picture indicate Hot ? in Past Cadillac Vehicle Discussion; Good Day: New here. I recently purchased a one owner 42xxx mile 1996 SLS. It was serviced every year at ...
  1. #1
    MDT's Avatar
    MDT
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    96 SLS - Does this gauge picture indicate Hot ?

    Good Day:

    New here. I recently purchased a one owner 42xxx mile 1996 SLS. It was serviced every year at the local Cadillac dealer. Could someone look at the attached picture and tell me if the temperature gauge is out of line? I've read they run a little hot. Just had radiator flushed and changed. No difference in the gauge.

    Thank you in advance!

    mdt
    Attached Images

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    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 96 SLS Seville Hot?

    It's perfect. Gauges DO move once in a while ............... and that one shows about 210 degrees. Your thermostat is not even fully open until 206 degrees.

    Study the forums for fan operation - there are different sequences for different vehicle operation settingts. The thermostat begins at 188 and is fully open at 206.

    Go to Engines, Northstar and read the sticky posts on gauge operation, cooling systems, and fans.Then go way up ^^^ to the top black bar and study the entire Cadillac Technical Archive.

    "They" DO NOT run a little hot. They run right where GM designed them to - if the cooling system is maintained properly. As you get your feet wet in these forums you'll see how and why it all works like it does. Welcome to the Funny Farm - - and now that you're a Northstar owner, I suggest you get on a steep learning curve. You WILL need a real GM/Helm service manual set or a subscription to www.alldatadiy.com. Read the owner's manual twice.
    MDT likes this.

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    Re: 96 SLS - Hot?

    I'm not sure where the '96 gauge normally runs, but that does not look like anything to get concerned over. The most important thing is consistency. If it always runs in that position at operating temperature then it is right where GM designed it to be.
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    Re: 96 SLS - Hot?

    Thank you very much. That certainly eases my mind for an upcoming 1500 mile trip.

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    Re: 96 SLS - Hot?

    The needle is in the correct position, ideally should be dead vertical but there are errors in the actual gage showing sometimes a bit to the right like in your picture. Mine is in EXACTLY the same position since 16.5 years ago.
    Please note during engine operation (while at the normal operating temperature) the coolant temperature varies between 196*F and 230*. The needle is dampened and will not show this variation (it will drive you insane to see the needle going up and down like that). Only when the coolant temperature goes over ~226*F and stays there for few minutes the needle will slowly start moving to the right. This is very normal. As long as it doesn't pass 1 tick to the right you have no reason of concern.

    Now if you do want to see the actual temperature of the coolant, you can set up the IPC to display it on the VFD display strip as one of the selectable items when pressing the INFO button (currently you have Instant MPG, Average MPG, Battery Voltage). The procedure of selecting other items to display does not require any tools, is selectable by using the Vehicle Diagnose Mode with the climate control module buttons.
    Please search on this forum for the How to “Add Coolant temperature”, it was posted many times (me including).
    aghgrn and MDT like this.

  7. #6
    DJP1990 is offline Cadillac Owners Fanatic
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    Re: 96 SLS - Hot?

    Don't mean to hijack the thread, but is that position of the temp gauge for 2000+ seville's also okay?

  8. #7
    MoistCabbage's Avatar
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    Your gauge has a slightly larger sweep, but yes.

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    Re: 96 SLS - Does this gauge picture indicate Hot ?

    The 9 marks on the pictured gauge are the same indication on all our "gauges".

    Come summer, turn OFF the entire HVAC system, open the windows and get into some rush hour traffic. What does the gauge do ? What is the fan sequence ? Where can you expect to see the gauge needle in that sort of heat ?

    Anyone is welcome to print/copy the picture for reference - it's in the public domain. For more Northstar stuff, look through my 2 albums. Community tab, Albums, the red Seville.

  10. #9
    N*Caddy's Avatar
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    Re: 96 SLS - Does this gauge picture indicate Hot ?

    ^^^^^

    "Temperatures indicated are approximate - each vehicle may vary"

    OP make sure you read that!

  11. #10
    Closet Boy's Avatar
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    Re: 96 SLS - Does this gauge picture indicate Hot ?

    Looks normal. My 97 STS was very similar.

  12. #11
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    Re: 96 SLS - Does this gauge picture indicate Hot ?

    That's perfectly normal.

  13. #12
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 96 SLS - Does this gauge picture indicate Hot ?

    Coolant temperature monitoring - do your own ................... (as well as a slew of other engine functions in real time)

    These OBD port monitors work with OBD-II (1996) and later CAN.

    www.scangauge.com - the ScanGauge-II

    www.ultra-gauge.com

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