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Thread: dodgy heater core temp sensor

  1. #1
    Join Date
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    dodgy heater core temp sensor

    A couple of things I've noticed since putting the top of the engine back together...

    Tappet noise is more evident now, or maybe it's just me listening for odd noises. Oil level is ok.

    I pulled the dip stick out while the engine was running and noticed a smoky mist coming out of the tube. Is that normal?

    Haven't driven it today but had it running in the garage for a while this evening. Plugged the FaultMate in to see if any faults were present and look at the readings with the engine running.

    Looked at the HVAC inputs and on one occassion the Heater Core Temperature was sitting at 6537 DegC That's the kind of temperature that got Chernobyl in trouble. Looked at it again a bit later and it was at 45 DegC. No cheque book symbol on the HVAC display but I think I should replace the sensor anyway. There was also a fault of "(50) HEATER CORE TEMPERATURE SENSOR CIRCUIT SHORT TO GROUND" which cleared ok.

    The Roughness and Timing screen showed each cylinder having a roughness value of between 0 and 1.9 - no idea what this means... maybe some help on the BlackBox site. Ignition advance values varied between -2 and 20 (assume Degrees or millisecs) over time for each cylinder. No misfires or knocks detected.

    It's all a learning experience

    Cheers, Paul.
    My toys, projects and write-ups at PaulP38a.com

  2. #2
    Join Date
    Jul 2008
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    Geelong Victoria
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    Quote Originally Posted by PaulP38a View Post
    A couple of things I've noticed since putting the top of the engine back together...

    Tappet noise is more evident now, or maybe it's just me listening for odd noises. Oil level is ok.

    I pulled the dip stick out while the engine was running and noticed a smoky mist coming out of the tube. Is that normal?

    Haven't driven it today but had it running in the garage for a while this evening. Plugged the FaultMate in to see if any faults were present and look at the readings with the engine running.

    Looked at the HVAC inputs and on one occassion the Heater Core Temperature was sitting at 6537 DegC That's the kind of temperature that got Chernobyl in trouble. Looked at it again a bit later and it was at 45 DegC. No cheque book symbol on the HVAC display but I think I should replace the sensor anyway. There was also a fault of "(50) HEATER CORE TEMPERATURE SENSOR CIRCUIT SHORT TO GROUND" which cleared ok.

    The Roughness and Timing screen showed each cylinder having a roughness value of between 0 and 1.9 - no idea what this means... maybe some help on the BlackBox site. Ignition advance values varied between -2 and 20 (assume Degrees or millisecs) over time for each cylinder. No misfires or knocks detected.

    It's all a learning experience

    Cheers, Paul.
    Its great, Paul. You get all the pain - and experience - and we get the gain, because you are so generous in sharing your experience. Thanks!

    Willem

  3. #3
    Join Date
    Aug 2008
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    Ditto

  4. #4
    Join Date
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    Quote Originally Posted by willem View Post
    Its great, Paul. You get all the pain - and experience - and we get the gain, because you are so generous in sharing your experience. Thanks!

    Willem
    What can I say - I'm a sharing and caring kind of guy - I guess it must be all the positive vibes that flow around Canberra, especially in the kind of work I do with the Govt

    Seriously though... I've been given so much help from people on this site in the past couple of years, it's good to be able to give something back every now and then.

    Cheers, Paul.
    My toys, projects and write-ups at PaulP38a.com

  5. #5
    Join Date
    Jun 2009
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    WHAT THEY SAID!!! MANY THANKS FOR THE ONGOING DIALOGUE AND SHARING. Dave

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