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Old 01-06-2012, 03:57 PM   #1
PWGuy
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How to remove front O2 sensor?

I can't seem to get the heat shield off to get to the front O2 sensor. Any alternate ways to get at it? I can't get leverage underneath to turn my channel lock and free the sensor.


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Old 01-06-2012, 04:05 PM   #2
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Ok I got the heat shield off. How in the world do I get the sensor loose?!??
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Old 01-06-2012, 04:38 PM   #3
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Do you have one of these things?:



It helps getting in tight places.
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Old 01-06-2012, 04:42 PM   #4
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Nope - O2 sensor removal socket? I'll stop by Advance or Autozone tonight and pick one up.
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Old 01-06-2012, 05:04 PM   #5
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Once I get the new one on the car, what is the torque spec? I have a couple torque wrenches and want to get it in there properly..
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Old 01-06-2012, 06:42 PM   #6
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On my 04 ZX3 last week I used only a 7/8” open end wrench to remove and inspect the O2 sensors. I have that exact socket and find it to be more of a pain to use with the cat installed. Remove the cat and that socket works great. Also, remove the sensors when the cat is cold and pre spray them with WD40 if needed.
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Old 01-06-2012, 10:56 PM   #7
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Not sure about the torque specs... I seem to remember they didn't go in super tight.
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Old 01-07-2012, 08:05 AM   #8
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Good and tight is all you need. Besides when using offset sockets, like an O2 socket you'll have to reconfigure the torque spec. So I just go on good and tight with some anti seize.
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Old 07-11-2012, 05:29 PM   #9
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Size of O2 sensor is 7/8"?
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Old 07-11-2012, 11:07 PM   #10
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Yes 7/8" or 22 mm.
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