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Old 01-30-2012, 11:46 AM   #1
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o2sensor dilema

Alright i went to change out my o2 sensors and found one that the wires were cut, sensor crimped, and its rounded off. Wny tips on getting it off? The other one is so tight i thought i was gonna snap my wrench and i feared rounding it off.
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Old 01-30-2012, 03:33 PM   #2
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Re: o2sensor dilema

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Alright i went to change out my o2 sensors and found one that the wires were cut, sensor crimped, and its rounded off. Wny tips on getting it off? The other one is so tight i thought i was gonna snap my wrench and i feared rounding it off.
Soak the threads for a day or two with a good penetrating fluid, then use a small pipe wrench or large vise grips on the rounded off hex.

Failing that you may have to apply heat to the sensor bung.
Try to concentrate on the bung. You want it to heat up the most and get a bit larger to enable you to break loose the sensor.
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Old 01-30-2012, 03:53 PM   #3
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Ill try that otherwise im thinking about finding some nuts that will fit the o2 sensors and torching off the old to weld the nuts on there

---------- Post added at 03:53 PM ---------- Previous post was at 03:52 PM ----------

And then putting the new o2 sensors in
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Old 01-30-2012, 04:00 PM   #4
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They sell o2 bungs.if u have a torch u should be able to get it though.good luck!
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Old 01-30-2012, 04:44 PM   #5
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Re: o2sensor dilema

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Ill try that otherwise im thinking about finding some nuts that will fit the o2 sensors and torching off the old to weld the nuts on there

---------- Post added at 03:53 PM ---------- Previous post was at 03:52 PM ----------

And then putting the new o2 sensors in
Just be sure to keep them in approximately the same position if you replace the bung.
I can't remember exactly what I read about that, but positioning is important.
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Old 01-30-2012, 07:40 PM   #6
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Re: o2sensor dilema

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Just be sure to keep them in approximately the same position if you replace the bung.
I can't remember exactly what I read about that, but positioning is important.
The length of the wire matters for the position in the pipe and also make sure the sensor is in the top half of the pipe so moisture can't sit on the sensor when the vehicle isn't running. But, like stated above, if you have access to a torch you should be able to just heat the bung up and use a pipe wrench or vice grips and get the old ones out. Good luck.
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Old 01-30-2012, 08:36 PM   #7
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Re: o2sensor dilema

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The length of the wire matters for the position in the pipe and also make sure the sensor is in the top half of the pipe so moisture can't sit on the sensor when the vehicle isn't running. But, like stated above, if you have access to a torch you should be able to just heat the bung up and use a pipe wrench or vice grips and get the old ones out. Good luck.
That's part of it.
There was more about location to the inside and outside of any bends, but I can't remember what I read.
It doesn't apply here, so I guess it isn't important right now anyways.
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Old 01-31-2012, 10:03 PM   #8
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Hey i got it off by torching it then ueing a pipe wrench but the threads on the old o2 sensor melted and screwed up the threads in the bung. Now hopefully work will let me use their tap set so i dont have to cut it off and weld a new one on
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Old 01-31-2012, 10:13 PM   #9
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Re: o2sensor dilema

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Hey i got it off by torching it then ueing a pipe wrench but the threads on the old o2 sensor melted and screwed up the threads in the bung. Now hopefully work will let me use their tap set so i dont have to cut it off and weld a new one on
If not, the cost of a tap will be less trouble and probably expense than cutting out the old one and replacing it. Just be sure it isn't so damaged that a tap won't help it much.
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Old 02-01-2012, 05:04 AM   #10
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It should help because the threads after pry the first three look fine
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Old 02-02-2012, 11:08 PM   #11
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Good news. Got ahold of a 18 mm 1.5 tap and fixed the threads on the one bung. Then used a gas welder tip to heat up the other one and used a pipe wrench to get it loose. Took a lot of grunting but finally got it to loosen and both new ones are in. I feel accomplished some what.
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Old 02-03-2012, 06:42 AM   #12
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Re: o2sensor dilema

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Good news. Got ahold of a 18 mm 1.5 tap and fixed the threads on the one bung. Then used a gas welder tip to heat up the other one and used a pipe wrench to get it loose. Took a lot of grunting but finally got it to loosen and both new ones are in. I feel accomplished some what.
Sorry this is late and I didn't think of it earlier.
Did you remember to put a bit of anti-seize on the threads?
Not too much so it doesn't run down and foul the sensor, just enough to protect the threads in case you need to get them off again.
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Old 02-03-2012, 07:10 AM   #13
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There was already some sort of grey gfease on them when installed
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Old 02-03-2012, 07:19 AM   #14
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Re: o2sensor dilema

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There was already some sort of grey gfease on them when installed
Then you should be good to go.


Notice any difference yet with the new sensors?
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Old 02-03-2012, 08:02 AM   #15
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I havent driven far enough yet and wont for awhile. Got a blizzard rolling through my state right now.
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Old 02-06-2012, 11:38 AM   #16
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Alright seems like the engine is running smoother and calculated 25 mpg on my last fill up
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Old 02-06-2012, 12:33 PM   #17
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Re: o2sensor dilema

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Alright seems like the engine is running smoother and calculated 25 mpg on my last fill up
Sounds like they helped.
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Old 02-06-2012, 03:43 PM   #18
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Ya I am happy
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