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Temperature Gauge

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by NAUBlazer, Feb 25, 2003.

  1. NAUBlazer

    NAUBlazer Registered Member

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    Hey guys,
    I have an 81 K5 with a carb. 350 and i can't figure out how to get my temperature gauge working again. I know there is a sensor that screws into the block on the passenger side and i've replaced that. The wiring harness to that is pretty beat up but still runs power to it. The gauge inside the truck use to always be pegged on H but now it will read cold but won't move. Anyone ever had this problem? Where could I get an aftermarket gauge that works? Thanks for the help!
     
  2. Highlander

    Highlander 1/2 ton status

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    You can a aftermarket temp gauge at just about any Auto parts place.
    And fit it on to your eng. usally you can find a spot on the intake. or just take out your old one and put the new one there.


    Eric
     
  3. OFFRDK5

    OFFRDK5 1/2 ton status Premium Member

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    Make sure it is hooked up. My guage went flat and it had come loose. Make sure all your wiring is good.
     
  4. heavy4x4

    heavy4x4 1/2 ton status

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    Just to let you know, the coolant temp sensor for the gauge is on the DRIVER'S side of the engine block, between cylinders 1 and 3. It's got a single wire coming out of it. Don't know if that's what you meant and it was just a typo. /forums/images/graemlins/confused.gif
     
  5. k20

    k20 3/4 ton status

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    the engine knock sensor is on the pass side of the block, did u replace that?
     
  6. caryhenry

    caryhenry Registered Member

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    if the gauge sensor is in the block, then what is the sensor on the water outlet for?
     
  7. milspecjimmy

    milspecjimmy 1/2 ton status

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    that one is for the computer to read
     
  8. Highlander

    Highlander 1/2 ton status

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    Are you talking about the one with the Vacuume lines?


    Eric
     
  9. caryhenry

    caryhenry Registered Member

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    are these sensors the same? I need to buy the one for the thermostat housing (ecu sensor). Are there different part numbers for the gauge sensor and the ecu sensor?
     
  10. heavy4x4

    heavy4x4 1/2 ton status

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    The coolant temp sensor for the gauge (engine block) and the coolant temp sensor for the computer (intake manifold by thermostat housing) are different sensors. The gauge sensor should have a weird shaped tip - almost looks like the head of a nail. The one for the computer has a two-prong electrical connection if memory serves me correctly. They are different, I'm sure of that.
     

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