Is this cut-off tool what I need to remove O2 sensor?

[atikovi]

Trying to remove this I assume original sensor on 180,000 mile car. Been alternating use of Areo Kroil and Mini Ductor until red hot and letting it cool, then using two types of sensor sockets, ratchet and cheater bar with no luck. Can sense the socket going to round off sensor if I try harder. Plan B was to use a deep 6 point socket but the sensor body is too thick to get it down to the hex part. So I need to cut it in half. No room for a reciprocating saw because of that shield. Looks like this Aircat 6275-A would work: http://aircat.com/products/die-grinders-cut-off-tools/4-composite-inside-cut-off-tool/ I can get for $173 or this Dynabride 18075: http://www.toolschest.com/mdco6741.html for $195. Thoughts? Want to avoid dropping the exhaust as much as possible.

 

[kiatech]

https://www.amazon.com/gp/aw/cr/B006L23SPA/ref=mw_dp_cr

 

[atikovi]

That would **** up against the floor or wouldn't have room to attach a ratchet or room to swing it.

 

[kiatech]

Take the cat out, doesn't look the bolts are even there anymore.
Or if your bent on cutting it in half just use a torch.

 

[Bobioz1]

Beat the top off with a hammer. Then use a six point socket. Done many of them.

 

[LXCam]

Beat the top off with a hammer. Then use a six point socket. Done many of them.

That's how I do the really bad ones.

 

[Mike.ASC]

Those cutoff tools should get in there to cut it off. My suggestion before spending the money for a cutoff tool that may not resolve the issue of getting the threads to break loose is this. Try using a air hammer with a tapered blunt end hitting a few seconds right around the welded in bung where the threaded area is just below the hex of the sensor. I know you have limited access but all it takes is a few seconds of hits to break the rust loose most times -then try getting a six point long wrench in there. When it starts to turn work it back and forth while spraying it with some penetrating oil until you get it out . This has worked hundreds of times for me in my shop over the years .

 

[RichWentFishing]

Thru socket and ratchet maybe?


Sent from my iPhone using Tapatalk

 

[maxpower_hd]

Beat the top off with a hammer. Then use a six point socket. Done many of them.

Me too. This is how I have done it.

 

[joe_padavano]

take the cat out, doesn't look the bolts are even there anymore.
Or if your bent on cutting it in half just use a torch.

^^^this!

 

[atikovi]

Try using a air hammer with a tapered blunt end hitting a few seconds right around the welded in bung where the threaded area is just below the hex of the sensor.

Thanks, that worked. Looked like it knocked the washer away so more Kroil could get at the threads, then heated it red again. Loosened right up.

 

[LXCam]

Most excellent.

 

[Mike.ASC]

Thanks, that worked. Looked like it knocked the washer away so more Kroil could get at the threads, then heated it red again. Loosened right up.

You are welcome , glad I could help.

 

[whateg01]

Glad you got that one out. I've never had an O2 sensor get rusted in. Every one of them I thing just got tighter from all the heat cycles. Once they broke loose, they could each be removed by bare fingers. I actually took a deep 6 point socket and cut it in half, then welded a piece of tubing in the middle to make it a deeper 6 point socket. Works great when there is room for it. Other times, I wish I had a 6 point box-end wrench.

 

[joe_padavano]

Other times, I wish I had a 6 point box-end wrench.

$16 at Home Depot.

 

[bcradio]

Glad to hear you got it and and I really like all of the suggestions made... why I like this place so much.

 

[bsaint]

This is better

https://www.amazon.com/dp/B000IHJWHC/?tag=atomicindus08-20

 

[Jason280]

This is better

https://www.amazon.com/dp/B000IHJWHC/?tag=atomicindus08-20

Never knew such an animal existed...

 

[Strouty]

Jason, you really need to stop posting, it makes it so hard for me to read.

 

[whateg01]

Jason, you really need to stop posting, it makes it so hard for me to read.

Oh, look. There were words in his post. I didn't even notice them!

 

[2ndGearRubber]

Cut the little shield off with a cutoff wheel (or a torch). Then use a box end wrench, or "flank-drive" style open end.

FWIW my #1 02 removal tool is mt 22mm Wright Grip wrench.



I generally advise against heat on 02 bungs. The threads can pull put of the very easily. But you gotta do what you gotta do.

 

[Super Mech]

I swear that every time Jason posts I forget what the hell the thread is about.

 

[Murphy4570]

Heat the O2 bung with an oxy-acetylene torch till it is cherry red, then remove the sensor. 50% chance you will mess up the threads.

Keep an 18x1.5mm tap handy. Worst case weld a new O2 bung on top of the existing one.

 

[Bryan Burns]

I tried to remove one laying on my back on a creeper and failed. Took it to an independent muffler shop. Best $25 I ever spent. The threads came with it when they removed it, the chased the threads and installed the new one.

 

[ChevyEFI]

Good to hear it worked out. Looks like a "tighten first to break it free" job.

 

[atikovi]

This is better

https://www.amazon.com/dp/B000IHJWHC/?tag=atomicindus08-20

I have that and used the business end but with a ratchet. No room to use the impact rod.

 

[justanengineer]

I tried to remove one laying on my back on a creeper and failed. Took it to an independent muffler shop. Best $25 I ever spent. The threads came with it when they removed it, the chased the threads and installed the new one.

What the muffler shop didn't tell you -

O2 sensors have butter-soft, cheap, rolled tin threads. Most mechanics dont bother trying to remove them as mentioned above, they use a wrench to tighten and strip the threads. Even if you're careful during removal in many cases the threads strip so you're not gaining anything by being careful. A quick tap through the threads cleans them up and you're done in <2 mins in many cases.

 

[Bobioz1]

Worst tip ever.

 

[Ricky112]

Every o2 sensor I do at work I heat up with torches till red then remove. I have a 02 sensor socket set,
https://www.amazon.ca/dp/B00MZOT4VA/?tag=atomicindus04-20

a thread chaser and a tap are on hand as well

I like having tools