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Installing o2 sensor in non-smog headers...UPDATE>>>DONE!

Discussion in 'The Garage' started by yeild2me, Jan 30, 2004.

  1. yeild2me

    yeild2me 1/2 ton status

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    Can I just drill a hole, weld a nut, screw in the 02 sensor and cut/splice an extension on the pigtail??

    Sounds easy enough...Anybody have any personnal exp???



    Rob
     
  2. backyardbuilt

    backyardbuilt 1/2 ton status

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    Re: Installing o2 sensor in non-smog headers...

    I am hoping thats all you have to do, as I need to do this too when I install my tbi. From everything I read that is all you do.
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: Installing o2 sensor in non-smog headers...

    Yes. The more of the sensor tip you get into the exhaust stream, the better though. (standard nuts are pretty thick for this)

    Better place is typically in the actual exhaust pipe if you have a header coating issue to worry with. Hedman will (obviously) void the header coating warranty if you weld on it.

    The further back you get though, the more likely you are to run into issues with the O2 sensor not getting hot enough, or staying hot enough, just have to try it.
     
  4. Tweetysuarus

    Tweetysuarus 1/2 ton status

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  5. bablazer73

    bablazer73 1/2 ton status

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    Re: Installing o2 sensor in non-smog headers...

    Use the weld on bung that "tweetysauras" linked you to. It has the correct thread and a flat surface for oxy sensor to seal on. I used one from painless wiring and welded it in my header collecter.
     
  6. fly_n_hi_yukon

    fly_n_hi_yukon Registered Member

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    Re: Installing o2 sensor in non-smog headers...

    Werd on the weld-in bung. It will give some meat for the threads to seat in and it makes it alot easier.
     
  7. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: Installing o2 sensor in non-smog headers...

    [ QUOTE ]
    The further back you get though, the more likely you are to run into issues with the O2 sensor not getting hot enough, or staying hot enough, just have to try it.

    [/ QUOTE ]

    I am planning on running a 3 wire heated O2 from a 1995 Chevy C1500 to eliminate this issue.
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: Installing o2 sensor in non-smog headers...

    There are obviously a lot of variables out there affecting this, because some people have no problem further back, and some do. Only way to know is try.

    If you have to buy an O2 sensor anyways, heated isn't much more than non IIRC.
     
  9. HarryH3

    HarryH3 1 ton status Author

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    Re: Installing o2 sensor in non-smog headers...

    [ QUOTE ]
    If you have to buy an O2 sensor anyways, heated isn't much more than non IIRC.

    [/ QUOTE ]
    The difference is only 100% or so. /forums/images/graemlins/eek.gif A one-wire sensor for my '91 is $30. A 3-wire for the '94 is $60. /forums/images/graemlins/frown.gif

    Of course it could be worse. The 3-wire for an '88 VX Fox that I've been messing with costs $100. /forums/images/graemlins/shocked.gif I'm sure glad that I didn't need to replace that! /forums/images/graemlins/thumb.gif
     
  10. fly_n_hi_yukon

    fly_n_hi_yukon Registered Member

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    Re: Installing o2 sensor in non-smog headers...

    Or you could have a Vortec truck and have 4 oxygen sensors to replace... /forums/images/graemlins/eek.gif
     
  11. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: Installing o2 sensor in non-smog headers...

    Are they that much?? I was thinking a 3 wire was something like $40!
     
  12. ntsqd

    ntsqd 1/2 ton status

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    Re: Installing o2 sensor in non-smog headers...

    O2 sensor threads are 18mm x 1.5 pitch, same as old large thread spark plugs. Local hardware store is owned by a hot rodder. He stocks 1/2 height unplated nuts just for this purpose.
     
  13. yeild2me

    yeild2me 1/2 ton status

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    Re: Installing o2 sensor in non-smog headers...

    Thats nice to know because the link to the Jegs part posted above is "ok" at 7.99, but then they add like another 8 bucks for shipping and handling!!!

    YEah, I will def. look around here locally...


    Thanks for all the input though.

    Rob
     
  14. HarryH3

    HarryH3 1 ton status Author

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    Re: Installing o2 sensor in non-smog headers...

    I bought a regular nut that fit and then split it in half on a bandsaw to make it thinner. /forums/images/graemlins/thumb.gif Cost me something like 49 cents. /forums/images/graemlins/cool.gif
     
  15. keith

    keith 1/2 ton status

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    Re: Installing o2 sensor in non-smog headers...

    Napa/Auto Zone/Adavance Auto Parts has these in the HELP section. There called psark plu adapters I think. Any way you just cut it into and there you go. /forums/images/graemlins/grin.gif
     
  16. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: Installing o2 sensor in non-smog headers...

    Are they called "spark plug anti-foulers"? I remember seeing those in the help section, basically designed to shield the plug from combustion from what I could see.

    Probably a good place for a donor alright. /forums/images/graemlins/smile.gif
     
  17. yeild2me

    yeild2me 1/2 ton status

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    Re: Installing o2 sensor in non-smog headers...

    18mm Spark-plug anti foulers or whatever....


    Went to the Zone (Cause Jesse James said so!! /forums/images/graemlins/grin.gif), went to the Help section, found the 18mm ones, 2 in a package BTW, took 'em to the shop, drilled a hole in the collector, cut the extra off, welded it in, and threaded the 02 sensor in......Looks factory!! /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif

    Thanks guys,,,,not only did I save 15 bucks, But the modification in done before my order would of been processed by Jegs!!


    Rob
     

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