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Thread: Front o2 Sensor Removal Help

  1. #1
    n13l pm's Avatar

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    Front o2 Sensor Removal Help

    Hi dudes..

    Anyone removed the front o2 sensor using standard tools?

    I took off the manifold guard type thingy in order to get a spanner around the 22mm nut for the o2 sensor but I only had a very limited amount of space and as I was using a fairly long tool I couldnt get much power into loosen the damn nut. After an hour or so of messing around I found out from googling you can get a socket which is made for this reason!! . So I put the manifold guard back on and im here asking the world of club vr4 for any advice or tips on how to remove it using standard tools before I go out this weekend to hunt one of these special sockets..

    Just thought il share the link of where I found out about the removal tool.. In case someone else has the same lack of knowledge as me on this subject!
    http://www.lambdapower.co.uk/technot...ting_guide.asp
    Galant 2.5 V6 24v Elegance 2003

    Blistein B12 Suspension Kit, Short Shifter, VR4 Front Strut Bar, Rear Spoiler, Amsoil Oil & Filter, Wind Deflectors, Sound Deadened, Stainless Steel Door Sill, Black Diamond Rear Brakes Discs & Pads, Headlight HID Kit, ICPC & ICE, Custom Centre Console - 8" Touchscreen LCD
    & DVD slot loader.

  2. #2

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    I got mine from halfords. It did the trick nicely.

    cheers,
    scc

  3. #3
    n13l pm's Avatar

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    Cheers Stephen, looks like il be heading down to halfords tomorrow morning then.

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    I've used very long screwdriver to lever this 22mm spanner...

    It was couple of years ago, but I remember this situation clearly... Totally pain in the A to remove if it's stuck... Happy that VR-4 do not have them.

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    Ive used a large adjustable spanner on other Mitsi's
    BMW E60 525i (3.0) M-Sport.

  6. #6
    n13l pm's Avatar

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    Thanks for everyones input.

    I picked up a sensor socket today and tried it but the damn thing aint moving for sh1t! looks like I got my self mission on my hands!

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    It needs to be marinaded in WD40.
    This means getting it warm (not hot) so that it's all expanded, and then sprayed. Wait a bit. Run the engine a bit until it's hot(ish) and sprayed again (if it turns into smoke it's too hot), and then give it a try with the socket. If it doesn't budge, then "rinse and repeat" (i.e. warm it and soak it again).

    It will go eventually with this method.
    The alternative is for the brave: take it for a serious thrash, so that the pipe is red hot. Leave the engine running, jump out, dive underneath, bash the socket on and it's likely to give.

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    n13l pm's Avatar

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    Quote Originally Posted by Turbo_Steve
    It needs to be marinaded in WD40.
    This means getting it warm (not hot) so that it's all expanded, and then sprayed. Wait a bit. Run the engine a bit until it's hot(ish) and sprayed again (if it turns into smoke it's too hot), and then give it a try with the socket. If it doesn't budge, then "rinse and repeat" (i.e. warm it and soak it again).

    It will go eventually with this method.
    The alternative is for the brave: take it for a serious thrash, so that the pipe is red hot. Leave the engine running, jump out, dive underneath, bash the socket on and it's likely to give.
    Il give the WD40 marinad method a try tomorrow, nice one Steve.

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    forgot to add, if you try the brave method, have some really stout gloves handy, as when it comes out you will accidentally touch it at some point. I always do, every time and the blisters are killer.

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    n13l pm's Avatar

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    I didnt get a chance over the weekend gone but I plan to attack the sensor this weekend coming.. Just thought il keep those interested updated.

  11. #11
    n13l pm's Avatar

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    Ok I just managed to replace the sensor which is at the top of the manifold, I did it at the end but cutting the wires and using a deep socket.. with a extended rod to a ratchet..

    Now I got to find the second front sensor! anyone know where that is?

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    Quote Originally Posted by n13l pm
    Ok I just managed to replace the sensor which is at the top of the manifold, I did it at the end but cutting the wires and using a deep socket.. with a extended rod to a ratchet..

    Now I got to find the second front sensor! anyone know where that is?
    Ouch! the second one is a tough one! You'll need to get right underneath the car, and it is on top of the pipe of the front pipe before the cat.

    Worse case is that you may need to drop the front pipe to get to it!

    cheers,
    scc

  13. #13
    n13l pm's Avatar

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    Quote Originally Posted by scc
    Ouch! the second one is a tough one! You'll need to get right underneath the car, and it is on top of the pipe of the front pipe before the cat.

    Worse case is that you may need to drop the front pipe to get to it!

    cheers,
    scc
    Thanks for the quick reply scc. il probably try this weekend.

    Did you do it youself? If the sensors on top of the pipe then I guess I have to remove the pipe, as the sensor's probably on solid and lack of space. Seems like a bit of mission.

    Thanks again mate.

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    You don't have to remove the pipe if the sensor comes out ok.
    It can be done in situ.

    I got a garage to do it. They put the car on the ramp, and armed with a spanner. they manage to undo it, and replace it with the new one. 10 minute job.

    Hope that helps.
    cheers,
    scc

  15. #15
    n13l pm's Avatar

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    Quote Originally Posted by scc
    You don't have to remove the pipe if the sensor comes out ok.
    It can be done in situ.

    I got a garage to do it. They put the car on the ramp, and armed with a spanner. they manage to undo it, and replace it with the new one. 10 minute job.

    Hope that helps.
    cheers,
    scc
    oh that sounds great.. I put it off last weekend because I thought it would be a mission. I going to be doing it this weekend at some point, hopefully a spanner is all it will take.

    Cheers for the tip scc. Can I just confirm that we have another two sensors after the cat? (just making sure im removing the correct one) Thanks.

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    The last time I looked, I've got 4 sensors.

    Two pre-cat on the down pipes, and two post cat.

    cheers.
    scc

  17. #17
    n13l pm's Avatar

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    Quote Originally Posted by scc
    The last time I looked, I've got 4 sensors.

    Two pre-cat on the down pipes, and two post cat.

    cheers.
    scc
    Thanks for confirming mate. il let you know how the replacing process goes..

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