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New temp gauge sensor installed; now gauge is near red 200 1984

posted by  Lord Volvo on  Mon Feb 25 08:44 CST 2013
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last visit: Sat Oct 4 15:55 CST 2014
[RELATED]

I replaced my temperature gauge sensor with a new one and now the gauge's needle peaks at just below the red zone when the engine warms up. I forget which vendor I ordered it from but it looked exactly like the old one except that the probe that goes inside the engine block is maybe a millimeter or two longer than the old one.

I thought I replenished any coolant lost during the change. I didn't drain the entire block; just above where that sensor sits. I put in the new coolant through the overflow tank.

The old sensor worked fine, BTW. I guess the easiest fix is to put the old sensor back in and see what happens. Is there something else I should be looking for?
--
Mike F - 1984 244 DL - 317,000 miles
Original engine, transmission, drive train, starter
Undergoing reconstructive surgery with POR-15

1972 142 S - The Yellow Brick - 135,000 miles
All stock except for Weber Carb. B20B engine. M40








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    New temp gauge sensor installed; now gauge is near red 200 1984

    posted by  7dddd on  Mon Feb 25 11:47 CST 2013
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    last visit: Sat Jul 13 07:44 CST 2013
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    "The old sensor worked fine, BTW. I guess the easiest fix is to put the old sensor back in and see what happens. Is there something else I should be looking for? "

    If the old sensor worked fine,then why did you get a new one?

    Is there something else you should be looking for?..Yes, both my 85 244DLs have had strange issues with the temp gauges.As you probably know,many or most 84 and 85s had bad wire insulation and that is the cause of many mysterious electrical problems.After spending much time and effort,I bought and installed a new seperate VDO temp gauge, and rigged the sensor/sending unit into the radiator hose.My factory gauges still do weird things,but I'm glad I took the time to install the new gauges.There's nothing worse than not knowing your engine temp.








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      New temp gauge sensor installed; now gauge is near red 200 1984

      posted by  Lord Volvo on  Mon Feb 25 13:29 CST 2013
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      last visit: Sat Oct 4 15:55 CST 2014
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      I ordered it by mistake. I meant to order a new temp sensor for the LH system but got the two mixed up. And since I got a new gauge sensor, I figured I would install it for the heck of it thinking that it wouldn't do any harm. Leave it to me to screw up something so elementary...

      I'll put the old one back in to see what happens.
      --
      Mike F - 1984 244 DL - 317,000 miles
      Original engine, transmission, drive train, starter
      Undergoing reconstructive surgery with POR-15

      1972 142 S - The Yellow Brick - 135,000 miles
      All stock except for Weber Carb. B20B engine. M40








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        New temp gauge sensor installed; now gauge is near red 200 1984

        uid 27's pic
        posted by  Art Benstein on  Mon Feb 25 14:27 CST 2013
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        last visit: Fri Oct 17 20:10 CST 2014
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        Mike, I think Bob (xray) just posted a week or so ago with the same symptoms. He put his old sender back and all was hunky-dory once again. Can't tell you what's going on, but it sounds like there's a trend.
        --
        Art Benstein near Baltimore

        When the smog lifts in Los Angeles, U. C. L. A.








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          New temp gauge sensor installed; now gauge is near red 200 1984

          posted by  Lord Volvo on  Mon Feb 25 15:45 CST 2013
          Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
          last visit: Sat Oct 4 15:55 CST 2014
          [RELATED]

          I'll have to run the resistance tests for that sensor as outlined in the Green book to see if it's defective. Meanwhile, I need to find the old sensor and put it back in.

          Thanks for the heads-up, Art.
          --
          Mike F - 1984 244 DL - 317,000 miles
          Original engine, transmission, drive train, starter
          Undergoing reconstructive surgery with POR-15

          1972 142 S - The Yellow Brick - 135,000 miles
          All stock except for Weber Carb. B20B engine. M40








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        New temp gauge sensor installed; now gauge is near red 200 1984

        posted by  7dddd on  Mon Feb 25 13:56 CST 2013
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        last visit: Sat Jul 13 07:44 CST 2013
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        "I ordered it by mistake. I meant to order a new temp sensor for the LH system but got the two mixed up. And since I got a new gauge sensor, I figured I would install it for the heck of it thinking that it wouldn't do any harm."

        Dont feel bad,I did exactly the same thing.I ordered the wrong sensor, decided to replace the old temp sender "for the heck of it",and the gauge did weird things. Like I said, I finally gave up and installed a secondary gauge.

        Good luck and best wishes.








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    New temp gauge sensor installed; now gauge is near red 200 1984

    posted by  aleekat on  Mon Feb 25 10:35 CST 2013
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    last visit: Fri Oct 24 13:19 CST 2014
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    Guess you have answered your own question. Put the old one back in and if it works properly. Then either they sold you the wrong one or bad out of the box.
    --
    Post Back. That's whats makes this forum work.







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