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O2 sensor nuts

Discussion in '1st Gen. Tacomas (1995-2004)' started by Old metals, Aug 29, 2023.

  1. Aug 29, 2023 at 4:00 AM
    #1
    Old metals

    Old metals [OP] Well-Known Member

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    Just curious, has anyone found a way to keep these from rusting? Along with the studs also. Also never knew to stick with the Denso brand. Now I do. Thanks to others.
     
  2. Aug 29, 2023 at 4:04 AM
    #2
    Bivouac

    Bivouac Well-Known Member

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    Because of the thermal cycling not much you can do.

    Anything you would spray or coat the hardware with would just burn off.

    You could try going to stainless steel studs and nuts.
     
  3. Aug 29, 2023 at 8:42 AM
    #3
    noodles93

    noodles93 Well-Known Member

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  4. Aug 29, 2023 at 9:23 AM
    #4
    Old metals

    Old metals [OP] Well-Known Member

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    @noodles93 Thank you. That is what I was looking for. Didn't even know copper was an option. Thanks again
    John
     
  5. Aug 29, 2023 at 4:09 PM
    #5
    O'Silver_Taco

    O'Silver_Taco Well-Known Member

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    coat em in ,,,anti seize......or that white high temp thread lock...

    not as much the nut as its the stud that turns to dust eventually....
     
  6. Aug 29, 2023 at 9:50 PM
    #6
    Caslon

    Caslon Well-Known Member

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  7. Aug 30, 2023 at 4:08 AM
    #7
    Bivouac

    Bivouac Well-Known Member

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    M8x1.25

    I have found by the time the O2 sensor fails the studs are going to need replaced .

    Most likely the whole exhaust system as well.
     
    Caslon[QUOTED] likes this.
  8. Aug 30, 2023 at 8:36 AM
    #8
    Caslon

    Caslon Well-Known Member

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    Not Mine! Damnit! (No whammy no whammy). Dry climate, non rust belt, USA. Much PB Blaster to be applied beforehand.
     
    Last edited: Aug 30, 2023
  9. Aug 30, 2023 at 9:40 AM
    #9
    Bivouac

    Bivouac Well-Known Member

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    My first O2 sensors needed replaced around 230,000 miles .

    I just replaced the whole exhaust because I had all the parts

    I am glad your in a dry Climate and don`t need to fight the constant battle with rust.
     
  10. Aug 30, 2023 at 10:21 AM
    #10
    Caslon

    Caslon Well-Known Member

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    Your cone heater element lasted a freakish amount of time. My PO131 CEL code indicates it’s the O2’s heater fail (at 123k). 230,000 miles? Unreal. Some report factory installed fail at 45K! They lament…”why is that?” You got lucky. Me? Lasted 123k.
     
    Last edited: Aug 30, 2023
  11. Aug 30, 2023 at 10:27 AM
    #11
    Bivouac

    Bivouac Well-Known Member

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    About time I have good luck for once.

    Maybe sensors and Cats were better in 2000.

    I have had PO420 codes from leaking gaskets the only issues.

    Other then pulling the front sensor harness out with the transmission.
     
  12. Aug 30, 2023 at 10:59 AM
    #12
    Caslon

    Caslon Well-Known Member

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    Connectors…heh. 15 minutes to get the sensor nuts off, 35 minutes to unbuckle the harness connector.
     
  13. Aug 30, 2023 at 11:18 AM
    #13
    Bivouac

    Bivouac Well-Known Member

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    There was no need to disconnect the harness connector that pulled apart just fine .

    Found a 4 pin male and female connector soldered and heat shrink the top truck side connector on with lots more length.

    Drop it down put the new connector on the O2 sensor side plug things in secure away from the exhaust no need to remove any rusted nuts or studs.
     
  14. Aug 30, 2023 at 11:49 AM
    #14
    Caslon

    Caslon Well-Known Member

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  15. Aug 30, 2023 at 11:59 AM
    #15
    Bivouac

    Bivouac Well-Known Member

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  16. Aug 30, 2023 at 12:24 PM
    #16
    toku58

    toku58 Well-Known Member

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  17. Aug 30, 2023 at 12:53 PM
    #17
    Bivouac

    Bivouac Well-Known Member

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    Remains to be seen I bought the tires and wheels the rest came along
    Been there buy Never seize by the case .In 3 different flavors .

    Around Here on exhaust it might help break your nut loose it does not keep the studs from deteriorating or the nuts from thermal cycling and winter chemicals.

    It goes on everything but engine internal hardware.

    It never hurts.
     
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