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  1. #1

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    o2 sensor install

    how much of a difference in afr readings will there be if i put my o2 sensor in the jpipe vs the exhaust manifold? i have an 06 rxp and im about to install a cmd and wb2 and need to install the o2 sensor. i dont know that i want to take a chance drilling the manifold and hitting the water jacket, so i figured just putting it in the jpipe wil be fine. whats the general consensus on this
    Last edited by joeytoad83; 07-25-2013 at 03:47 PM.


  2. #2
    Eric Ocman's Avatar
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    To spend the extra time and put it in the manifold. The jpipe kills em quick.

  3. #3

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    in that case has any one in tampa drilled a pre 08 manifold with out effing it up

  4. #4

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    Be sure that when you have it drilled and tapped that they mill down that boss so the tapped hole is at a right angle with the boss. Mine was not milled down and the 02 sensor was only sealing on one side of the tapped hole. And most of all measure, measure and measure again. As you can see in these pictures that I was too close to the water jacket, now a few of these threads were taken out by the blade on the band saw but it was still far too close. Three 02 sensors later I decided to saw this manifold in half to find out that this was indeed the problem. I have since bought another /newer model of this manifold and am looking for someone to drill and tap it correctlyClick image for larger version. 

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    Last edited by JohnW; 07-26-2013 at 08:37 AM.

  5. #5
    RXPJAY's Avatar
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    Search the tread skigolfnut wrote. He has a pretty good solution to make the pre 08 mani's pretty bullet proof. I did my 07, and got lucky. I do own a machine shop so everything was done with precision. Will it last???? time will tell. If it starts leaking, I will do it the sjigolfnut way!!!! It's the way to go.

  6. #6
    skigolfnut's Avatar
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    here is the link,
    http://www.greenhulk.net/forums/show...light=manifold
    the key is getting the pilot hole drilled dead center, and having a good clamp on the manifold so it will not move,
    15mm drill bit is just enough for the oxy sensor to go in to the bottom, but you only need to tap the top 1/2"-do not tap the compete length of the hole,
    good luck

  7. #7

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    is there measurements to make sure its centered. im gonna have it done i dont have the stuff to do it myself.

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