97 K3500 7.4 02 sensors.

[Supercharged111]

I cranked a set of these bad boys onto my last stubborn O2 sensor, then shoved a screwdriver in it to get it even tighter, then used a propane torch on the bung and beat the crap out of it with a hammer to crack it loose.

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I have a rethreader, but I find the tap works much better.

 

[454cid]

I cranked a set of these bad boys onto my last stubborn O2 sensor, then shoved a screwdriver in it to get it even tighter, then used a propane torch on the bung and beat the crap out of it with a hammer to crack it loose.

You must be registered for see images attach

I have a rethreader, but I find the tap works much better.

I used a tap too.... I did buy the Lisle rethreader, Though. I still should do the passenger side, but I'm not sure how I will access it.