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Prove a Design Flaw (help)

Discussion in '2nd Gen. Tacomas (2005-2015)' started by SubFrozen, Oct 23, 2009.

  1. Oct 23, 2009 at 8:39 AM
    #21
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    There is a chance the sensor WAS still imersed in coolant. If you lost enough and the pump was pushing air, there could have been some coolant pooling around the sensor, in which it read normal. Hard to tell really. Didnt you smell the coolant when you were driving?
     
  2. Oct 23, 2009 at 8:40 AM
    #22
    rb11701

    rb11701 Oh yeah!

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    I think making fun of the guys request is a tad overkill. In good fun or not. Not everyone is in tune with the do's and don'ts of proper auto care. If you read his original story it would appear he tried to do what was needed from the manual plus he was out in the middle of nowhere. So i say cut him slack and not riddle him for what he did or did not do. Just my thoughts.

    To the OP, nobody is going to try what you have asked. Especially how it turned out for you. IMO, if a dealership sold a vehicle it should have been checked over. And not seeing a missing clamp should be part of the coolant system check I would imagine. But who knows. I would talk to a lawyer who deals in that sort of practice. It is becoming clear that the dealer is not going to warranty it.

    I hope it all works out for you, I really do. That sucks.
     
  3. Oct 23, 2009 at 8:50 AM
    #23
    98tacoma27

    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    It still detects a temperature if the fluid is not present. It's a thermistor. It reads the surrounding temperature regardless, just like a thermometer does. You wouldn't expect a brand new thermometer to read 0° just because it isn't in water. There is no flaw in the temperature circuit. The reason it "reads better" in water is because water has a greater capability to transfer/absorb heat than air does. So, with that being said the temperature of the motor was beyond normal without a doubt but the reason the gauge didn't relate this to you is because it was reading the air temperature in the system. Remember, air does not transfer heat like water does.
     
  4. Oct 23, 2009 at 8:54 AM
    #24
    SubFrozen

    SubFrozen [OP] r00t

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    The air in the system was hot enough to melt the plastic in the radiator - would think that would adjust the readings a little bit in the system, but I may be wrong.

    I'll get the sensor out, put it in a hot thing of water to show readings. Then I'll put it next to a very hot surface, enclosed, and see if it also gets readings.

    There was zero fluid in the system - it was so hot, plastics around the engine melted.
     
  5. Oct 23, 2009 at 9:03 AM
    #25
    98tacoma27

    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    There is the posibility that the sensor got hot enough and was damaged. It would take a minimum temperature of 325-350­° to melt that plastic. I am sure that is beyond the sensors threshold. You will need to test it with an OHM meter. Test it at ambient temperature. You should even see a reading change by simply holding it tightly in your hand. Granted, if the sensr didn't die form the over-heating.
     
  6. Oct 23, 2009 at 9:05 AM
    #26
    98tacoma27

    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    It is more likely that it was steam and not air. Once enough fluid is out of the system, the pump is worthless. They are plenty of internal knooks and crannys for fluid to lay, even in the heater core. Steam can drill holes in steel,
     
  7. Oct 23, 2009 at 9:28 AM
    #27
    SubFrozen

    SubFrozen [OP] r00t

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    That's painful. The engine hit 275 degrees, prior to 24 additional miles of driving. Imagine the heat coming from it after that.

    I expect to find plastics around the engine compartment to be melted.
     
  8. Oct 23, 2009 at 11:53 AM
    #28
    MoundTaco

    MoundTaco New Member

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    Not sure that I buy wet temperature is different than dry temperature? The sensors are typically thermistors that change resistance with Temperature. The coolant is actually what keeps the sensor cool? No coolant would actually just make the sensor hotter.
     
  9. Oct 23, 2009 at 12:07 PM
    #29
    dorkman

    dorkman Well-Known Member

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    Yes, I have both Oil Temp and Pressure Autometer gauges installed on my truck. Pressure runs between 20-70, temp runs between 180-210.

    Easy to do with a sandwich adapter on these trucks, not sure how accurate the readings are since I have them monitored right at the filter, but it gives me a baseline to know if something is not right, which is all I need.
     
  10. Oct 23, 2009 at 12:23 PM
    #30
    OU812

    OU812 ban the term murdered out

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    No the gauge will not report zero. I don't know if these trucks have a low coolant warning light. That is an entirely different type of sensor. Is the lack of the feature a design flaw? I say no. If somone disagrees then chime in. That would be of flawed logic and one could say "the truck should not have blown the differential because I was towing 10,000 lbs with it one day." Or, "It should have warned me I needed brakes before I hit the car ahead of me".

    Your going about this the wrong way. It's not a design flaw, it's an issue of incompetence on the part of the dealer that sold you the truck or the person that serviced the truck before you bought it.

    I feel for you. It sucks. But don't blame the truck, blame the pinhead that inspected/serviced it.
     
  11. Oct 23, 2009 at 5:11 PM
    #31
    swise

    swise TRIFECTA!!!

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    Sorry to joke, I could'nt resist. Good Luck
     
  12. Oct 24, 2009 at 10:14 AM
    #32
    98tacoma27

    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    Temperature is temperature regardless of the medium, agreed. 100 degree water = 100 degree air. But, the sensor was designed to be immersed in water/coolant not air. The coolant mixture will transfer the heat energy to the sensor more efficiently than air would because of the sensor design.
     

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