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Old June 14th, 2013, 10:18 AM   #1
Catnip 0_o
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O2 removal - proper torch useage

2002 TJ 4.0L
Removing Upper Front Pre Cat O2

I have been trying to remove the O2 for quite some time now with no luck. Started with a o2 socket and that just bent, then used a wrench but wouldn't budge, then let it heat up from driving and still nothing. I went out and purchased one of those hand torches but it still wouldn't come off.

I let the torch sit on the o2 for about 35 seconds but still nothing. The part where the o2 plugs into the exhaust did not get cherry red, this is ky first time ever using a torch so I'm not sure if I did it right or not.

Should I let the flame sit on the part where it screws in longer? Or does turning the turn valve on the torch make it hotter or is that just for distance?

Thanks
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Old June 14th, 2013, 10:39 AM   #2
branch92
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Heat the bung up till it is red if that doesn't work heat it up again and quench it by pouring water on it and then try and turn it out
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Old June 14th, 2013, 10:40 AM   #3
Sandals
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Get a good penetrating lubricant (PB Blaster or seafoam deep creap are my choices) spray it on there and let it sit, i would spray a few times every 10 minutes.

Get a closed end wrench that fits it (If you can, most i've been able to) and get that over the sensor, if the plug in the way cut it, if you are replacing no loss, if not splice the wires together later.

With the wrench on, tap the end of the wrench with a hammer. The impact should help to loosen the rust bond in the threads in addition to the lubricant.
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Old June 14th, 2013, 11:54 AM   #4
Catnip 0_o
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Is PB blaster flammable?
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Old June 14th, 2013, 12:50 PM   #5
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Quote:
Originally Posted by Catnip 0_o View Post
Is PB blaster flammable?

totally lol


That said, i've removed a ton of O2 sensors and never had to resort to a torch.
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