Oxygen Sensor Removal - Defender Source
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  #1  
Old May 15th, 2014, 04:03 PM
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Ron
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Oxygen Sensor Removal

I soaked it with penetrating oil, used the special tool, used the vise grips......now its no longer a hex and will not budge. Next step............
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  #2  
Old May 15th, 2014, 04:13 PM
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Lesson learned then. Penetrating oil doesn't do jack shit for really stuck bolts. You need copious amounts of heat to get things moving. Only then can the penetrating oil begin to work its magic.

For now, you need either mapp gas or possibly oxy-acetylene to heat things up. Then try the vice grips again.

I recently had one snap off in the downpipe after heating with mapp gas for an extended period of time.

I was able to remove the broken off bit by hogging it out with a right-angle dremel tool, and cleaning the threads out with the correct size tap.

Worst case scenario you can do the same or just drop the Y-pipe and have at it with more conventional tools.

But lets not get ahead of ourselves.

Get it glowing cherry red and let us know how that works.

Quote:
Originally Posted by Videoguy View Post
I soaked it with penetrating oil, used the special tool, used the vise grips......now its no longer a hex and will not budge. Next step............
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  #3  
Old May 15th, 2014, 04:39 PM
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Ron
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O2 Sensor Removal

Sounds like I need to find me a man with a flame thrower. Thanks
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  #4  
Old May 15th, 2014, 04:45 PM
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agreed if you get it cherry red it might come out but most of the time its going to mess up the threads. next option is leave that one in cut the harness off it and weld on new 02 bung install new sensor and call it a day
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  #5  
Old May 15th, 2014, 06:50 PM
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I beat it to a muffler shop and had a new boss welded on........fixed the problem in 20 minutes.
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  #6  
Old May 15th, 2014, 07:21 PM
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ahh i like to hit it with pb blaster a few times while the exhaust is hot, a few intervals of this treatment generally does the trick. Ive replace 10 oxygen sensors on Land rovers over the years, ive broken one.
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  #7  
Old May 15th, 2014, 07:55 PM
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I've replaced dozens of oxygen sensors and the problem I run into the most is the threads being damaged on removal. This on mostly on newer Land Rovers. If it feels like it is rounding off I will cut the wires off and use a deep well socket.
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Old May 15th, 2014, 08:29 PM
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I was disappointed that the special tool could not do the job. What is PB Blaster?
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  #9  
Old May 15th, 2014, 08:39 PM
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Quote:
Originally Posted by Videoguy View Post
I was disappointed that the special tool could not do the job. What is PB Blaster?
PB Blaster is penetrating oil.
http://www.amazon.com/Blaster-16-PB-.../dp/B000I2079E

Personally, I go straight to Kroil.
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  #10  
Old May 15th, 2014, 09:03 PM
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Quote:
Originally Posted by Jymmiejamz View Post
cut the wires off and use a deep well socket.
This works for me. The vise and special socket still expand when turning.
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  #11  
Old May 15th, 2014, 10:26 PM
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Quote:
Originally Posted by Videoguy View Post
I was disappointed that the special tool could not do the job. What is PB Blaster?
What is the brand of the special tool? I've seen Snap On open ended wrenches work better than other brand line wrenches.
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  #12  
Old May 15th, 2014, 11:31 PM
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Robert Lynch
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mine come out with a random wrench from the 1950's (from my porsche tool kit) it has bent ends, a quick turn and its loose... i do use hi temp anti seize after fighting with the first one now. Once the bolt is rounded, then its heat and vice grips time or outsource which you did...
no issues with a craftsman wrench (older one if that matters)
right one can be done from the top as well.. (on a 95 90) the left one you have to go below...
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  #13  
Old May 15th, 2014, 11:56 PM
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If I'm doing 02s I PB blast once a day for the entire week leading up to the job. Maybe overkill, but nobody has corrosion like Vermont.
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  #14  
Old May 16th, 2014, 08:11 AM
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Mark Garrenton
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X2 Kroil
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  #15  
Old May 16th, 2014, 08:58 AM
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Quote:
Originally Posted by Z.G View Post
If I'm doing 02s I PB blast once a day for the entire week leading up to the job. Maybe overkill, but nobody has corrosion like Vermont.
That's my method
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