O2 Sensor stuck... - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ThisGuy919 · 10-15-2013, 05:43 PM

Been trying to get this O2 sensor off all day. First one came off pretty easily but this one... its pretty stuck. tried an impact wrench (electric seem'd weak), muscling it with a wrench, and tried muscling again with an o2 remover socket. Nothing worked.. Took it to the dealer and they could'nt get it off either. Anyone have a solution for this? Trying to reuse the o2 sensor so i dont want to spray any PB blaster on it (hear it ruins the sensor).

King Tut · 10-15-2013, 05:46 PM

If an O2 remover socket and a 1/2" breaker bar didn't get it out, then I am not sure you are going to be able to save it and I would resort to some rust penetrant.

jamesm · 10-15-2013, 06:05 PM

breaker bars solve all the world's problems. at least the important ones.

m.wood0213 · 10-15-2013, 06:07 PM

CHHHEEEEEEAAAAATTTTT!

uspspro · 10-15-2013, 06:16 PM

PB Blaster (just go easy) work it back and forth, in stages, until it turns easy.

You will probably still end up with buggered threads on the sensor - If you happened to make any progress with the impact/breaker, without the PB Blaster, that movement was probably the the expense of the threads.

The heat from the cat causes this. I had the same thing happen, PB blaster was the only way I could get it out, but the threads were trashed. Luckily for me, I had a spare Toyota O2 sensor in my bin of parts. I just had to hack off the end and solder on a male vs. female plug (same exact style plug). I also had a spare connector in my parts bin.

Calum · 10-15-2013, 09:58 PM

um... heat?

Or perhaps use the noisy cricket approach. Use an impact gun set low and just let it sit there banging away for awhile. If the sensor doesn't move after 5 minutes move the gun to the next setting and try again. A pair of ear plugs is recommended as the noise will quickly get annoying/painful. It takes a while but it's never failed me and VERY few threads have come out messed.

Pure Automotive · 10-15-2013, 10:02 PM

I've came across this 7 different times on customers twins. There's just certain headers that get stuck and it's always that sensor. I have been able to save 1 of the 7 that got stuck, the others were ruined and had to be replaced. I keep those in stock now because it was happening so often.

SloS14 · 10-15-2013, 10:03 PM

I've never ruined a sensor with PB personally and have used it several times on my FR-S's o2 sensors.

Pure Automotive · 10-15-2013, 10:04 PM

Quote:

Originally Posted by SloS14

I've never ruined a sensor with PB personally and have used it several times on my FR-S's o2 sensors.

This is not a situation where PB fixes the problem, the ones that I have had stuck are cross-threaded from the factory.

aagun · 10-15-2013, 10:04 PM

heat it >>>

SloS14 · 10-15-2013, 10:10 PM

Quote:

Originally Posted by Pure Automotive

This is not a situation where PB fixes the problem, the ones that I have had stuck are cross-threaded from the factory.

Sorry, I should have clarified. PB is short for NPBBWTFT (New PB Blaster with thread fixing technology).

I hope the factory isn't getting these things on by half a thread then zipping them on.

ThisGuy919 · 10-18-2013, 04:02 AM

Got it off that night and man was it cross threaded...by the time we got it out the threads were obliterated. o.O pb blaster did the trick. Wanted to avoid it because of that slight chance it will seep into the sensor itself... Ended up working out.

ft86me · 10-18-2013, 04:18 AM

WD40 is what we use at my shop when this happens. try an open ended wrench as well. if not try a 02 sensor removal tool that looks like a 12point and is short. the longer, the less power you put down. hope this helps. haven't run across an 02 sensor i couldn't take off with the previous things over a span of 8 years.

oh almost forgot, try to tighten a bit then go back to trying to loosen it. sometimes tightening will get it to budge. so little umph tightening then try to loosen. if it budged then you're good and if it's super hard to spin with the wrench. do the same motion with wd40 over and over until it's out with of course the loosening having more umph than tightening. hope this helps.

Fast_Freddy · 10-18-2013, 05:58 AM

WD40 or PB Blaster won't help much when the sensor is badly cross-threaded from the factory. I had a hell of a time getting mine out and 1/2 the threads were stripped off. Using gunsmithing files I was able to clean up the threads just enough to get the sensor threaded into a mini-cat.

10-15-2013, 05:43 PM	#1
ThisGuy919 Senior Member Join Date: Aug 2013 Drives: 2013 Scion FR-S Location: North Carolina Posts: 201 Thanks: 77 Thanked 24 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	O2 Sensor stuck... Been trying to get this O2 sensor off all day. First one came off pretty easily but this one... its pretty stuck. tried an impact wrench (electric seem'd weak), muscling it with a wrench, and tried muscling again with an o2 remover socket. Nothing worked.. Took it to the dealer and they could'nt get it off either. Anyone have a solution for this? Trying to reuse the o2 sensor so i dont want to spray any PB blaster on it (hear it ruins the sensor). Attached Images

10-15-2013, 05:46 PM	#2
King Tut NASA SpecE30 Racer Join Date: May 2012 Drives: 2006 Honda S2000 Location: Gulf Breeze, FL Posts: 7,279 Thanks: 607 Thanked 5,759 Times in 3,055 Posts Mentioned: 274 Post(s) Tagged: 10 Thread(s)	If an O2 remover socket and a 1/2" breaker bar didn't get it out, then I am not sure you are going to be able to save it and I would resort to some rust penetrant. __________________ - King Tut Street/Track Car: 2006 Honda S2000 TT3 \|\| Race Car: 1987 BMW 325is SpecE30 \|\| Tow Vehicle: 2014 RAM 1500 EcoDiesel Sold Cars: 2012 BMW M3 \|\| 2013 Subaru BRZ \|\| 2012 Porsche Cayman R \|\| 2009 Chevrolet Z06 \|\| 2009 BMW M3 \|\| 2004 BMW M3 \|\| 2004 Nissan 350Z

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10-15-2013, 06:05 PM	#3
jamesm Banned Join Date: Mar 2013 Drives: 2013 FR-S Location: Orlando, FL Posts: 2,929 Thanks: 1,166 Thanked 2,293 Times in 1,180 Posts Mentioned: 313 Post(s) Tagged: 4 Thread(s)	breaker bars solve all the world's problems. at least the important ones.

10-15-2013, 06:16 PM	#5
uspspro Senior Member Join Date: Mar 2012 Drives: DGM BRZ, MR-S 3.5L V6 swap (sold) Location: Bay Area, CA Posts: 602 Thanks: 28 Thanked 188 Times in 121 Posts Mentioned: 1 Post(s) Tagged: 1 Thread(s)	PB Blaster (just go easy) work it back and forth, in stages, until it turns easy. You will probably still end up with buggered threads on the sensor - If you happened to make any progress with the impact/breaker, without the PB Blaster, that movement was probably the the expense of the threads. The heat from the cat causes this. I had the same thing happen, PB blaster was the only way I could get it out, but the threads were trashed. Luckily for me, I had a spare Toyota O2 sensor in my bin of parts. I just had to hack off the end and solder on a male vs. female plug (same exact style plug). I also had a spare connector in my parts bin.

10-15-2013, 09:58 PM	#6
Calum That Guy Join Date: Dec 2011 Drives: 2013 asphalt FRS MT Location: Halifax, Nova Scotia Posts: 4,865 Thanks: 5,058 Thanked 2,868 Times in 1,499 Posts Mentioned: 82 Post(s) Tagged: 1 Thread(s)	um... heat? Or perhaps use the noisy cricket approach. Use an impact gun set low and just let it sit there banging away for awhile. If the sensor doesn't move after 5 minutes move the gun to the next setting and try again. A pair of ear plugs is recommended as the noise will quickly get annoying/painful. It takes a while but it's never failed me and VERY few threads have come out messed.

10-15-2013, 10:02 PM	#7
Pure Automotive Join Date: Nov 2012 Drives: 2013 FRS Whiteout Location: Millersville, MD Posts: 2,035 Thanks: 735 Thanked 1,952 Times in 650 Posts Mentioned: 147 Post(s) Tagged: 0 Thread(s)	I've came across this 7 different times on customers twins. There's just certain headers that get stuck and it's always that sensor. I have been able to save 1 of the 7 that got stuck, the others were ruined and had to be replaced. I keep those in stock now because it was happening so often.

10-15-2013, 10:03 PM	#8
SloS14 Senior Member Join Date: Apr 2013 Drives: 2013 FR-S whiteout Location: United States Posts: 726 Thanks: 381 Thanked 652 Times in 256 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I've never ruined a sensor with PB personally and have used it several times on my FR-S's o2 sensors.

10-15-2013, 10:04 PM	#10
aagun Senior Member Join Date: Nov 2012 Drives: 86 Location: uae Posts: 403 Thanks: 202 Thanked 67 Times in 56 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	heat it >>>

10-18-2013, 04:02 AM	#12
ThisGuy919 Senior Member Join Date: Aug 2013 Drives: 2013 Scion FR-S Location: North Carolina Posts: 201 Thanks: 77 Thanked 24 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Got it off that night and man was it cross threaded...by the time we got it out the threads were obliterated. o.O pb blaster did the trick. Wanted to avoid it because of that slight chance it will seep into the sensor itself... Ended up working out.

10-18-2013, 04:18 AM	#13
ft86me Senior Member Join Date: Feb 2013 Drives: 2013 FRS Location: Endor Posts: 1,231 Thanks: 802 Thanked 349 Times in 212 Posts Mentioned: 60 Post(s) Tagged: 1 Thread(s)	WD40 is what we use at my shop when this happens. try an open ended wrench as well. if not try a 02 sensor removal tool that looks like a 12point and is short. the longer, the less power you put down. hope this helps. haven't run across an 02 sensor i couldn't take off with the previous things over a span of 8 years. oh almost forgot, try to tighten a bit then go back to trying to loosen it. sometimes tightening will get it to budge. so little umph tightening then try to loosen. if it budged then you're good and if it's super hard to spin with the wrench. do the same motion with wd40 over and over until it's out with of course the loosening having more umph than tightening. hope this helps.

10-18-2013, 05:58 AM	#14
Fast_Freddy Senior Member Join Date: Jul 2012 Drives: Passat Location: East Coast Posts: 626 Thanks: 331 Thanked 188 Times in 130 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	WD40 or PB Blaster won't help much when the sensor is badly cross-threaded from the factory. I had a hell of a time getting mine out and 1/2 the threads were stripped off. Using gunsmithing files I was able to clean up the threads just enough to get the sensor threaded into a mini-cat.

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