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Thread: lambda nut

  1. #1
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    lambda nut

    What nut do I need for the lamda in the downpipe?
    I think the S13 has M18 by 1.5 pitch nut. Is the S14/15 the same?

    Also in FAST there seems to be an adapter on the lambda sensor
    Nissan GTR -09 Now with Cobb accessport stage 2

  2. #2
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    The lambda doesn't go in the downpipe. Its in the turbo elbow/dump pipe and should just screw in as a complete unit.

  3. #3
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    Quote Originally Posted by Nicely
    The lambda doesn't go in the downpipe. Its in the turbo elbow/dump pipe and should just screw in as a complete unit.
    Its true you know

  4. #4
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    Sorry. I meant the dump-pipe (turbo-elbow).
    problem is that the nut welded on the dump-pipe is the wrong one (maybe).
    So I'll have to get a new nut and have it welded on.
    Just wondering what to get.

    Airtune sold the other dump-pipe to a company in Finland and they said that the lambda would fit if the adapter thingie was removed from the lambda and the sensor was mounted directly on the dump-pipe.

    Never heard of the adaptor thingie before so I'm not so sure that it's correct.
    Nissan GTR -09 Now with Cobb accessport stage 2

  5. #5
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    I don't know what the issue is. This is the elbow I got (the big one - fantastic quality, seamless SS) and the lambda just transferred straight over...


  6. #6
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    OK.

    I was wondering what thread the lambda has so I can get the proper fitting welded on to the dump-pipe.
    The S13 has M18 by 1.5 pitch nut. Is the S15 fitting the same? If not. What is it?
    Nissan GTR -09 Now with Cobb accessport stage 2

  7. #7
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    Not a clue. No reason to know. Why not just get a proper pipe with one already on...?

  8. #8
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    Quote Originally Posted by Nicely
    Not a clue. No reason to know. Why not just get a proper pipe with one already on...?
    Because the one I've got was hella-cheap
    And i friend of mine can do the welding so that part will be cheap to

    I could always have the stock dump-pipe removed and check what thread it is and then start to work on the new pipe.

    Just thought it would be easier to have the replacement pipe ready.
    Nissan GTR -09 Now with Cobb accessport stage 2

  9. #9
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    Got mine from Creasey (http://www.cgarage.co.uk) on SXOC. Can't remember the price, but it was significantly cheaper than Apex, better design, and the best quality of SS you can get.

  10. #10
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    99.99% sure it is 18 x 1.5...

    I think the issue that you see in the pictures is because there are 2 Nissan O2 sensors, the earlier type are narrower (can't remember how much) - therefore if you had this type you'd need the adaptor.

    This shouldn't be a problem as all newer O2 sensors for Nissan are the 'standard size' I had a problem with my headers as I bought them for an S13 and the O2 sensor bung was smaller - didn't take more than a few minutes to cut it off and weld a proper sized one back on.
    Chris
    1999 S15 Spec S Auto (ever so slightly modified)
    1996 Skyline GTR (UK Holiday car); 2001 Lotus Esprit V8GT (moderate tuning); 2008 BMW 135i (looking for more power)

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