Help remove upper O2 sensor

[fastback4]

I've soaked it with the best penatrate on the market while using the O2 sensor removal socket, and the upper O2 sensor on my monte 3.1 won't budge. I can't get a pipe wrench around it. There's plenty of room to work with it cause i'm replaceing the head gaskets. Suggestions welcome....Tom

[Weatheralls Auto]

Run it and get it Hot, this will help out.

You will need to have a tap ready for the pipe, as the threads will be messed up upon removal.

[IsaacHayes]

On mine, I stuck 1/2" extensions up to where I could get a breaker bar on it. The bar was bending and then it broke free, threads were ok thank god... LMAO I soaked it in PB Blaster for a couple nights. Soaking it good each day...

Using an impact gun might actually be better and help.... Less chance of breaking a tool or the manifold/O2 sensor/socket... The sudden shock/jarring of the impact breaks free rust...

[robertisaar]

mix ATF and acetone at a 50/50 mixture. that stuff works wonders for breaking through rust.

[fastback4]

Thanks. Thing i'll soak'er real good for a while, heat'er up a little with a torch..... Tom

[16vconversion]

Chase the threads before installing the new o2 , I wrecked a wideband by not doing that.

[fastback4]

Will chase the threads before reinstalling O2..........Tom