Seized O2 Sensor
March 12, 2009 5:38 PM Subscribe
I can't get the O2 sensor out of my car's engine, and I'm starting to round off the bolt!
I'm trying to replace the upstream O2 sensor in my 1998 Honda Civic LX. It sounded like a simple job, so of course something had to go wrong. The sensor is pretty well seized up. I'm using one of those special O2 sensor sockets with the big cutout to let the wires out. I'm pushing the thing so hard it feels like the walls of the socket are flexing a bit, and I'm starting to round off the bolt part of the O2 sensor. Things I've tried:
- Running the engine for a while first to get it hot.
- Striking the sensor (gently) with a hammer.
- Spraying it with WD 40 and giving it plenty of time to work its way in.
- Putting teflon tape around the bolt to help the socket get a better grip.
So, how do I get this stupid O2 sensor out? I don't want to destroy the old sensor (so I can put everything back the way it was, if something goes wrong), so I can't cut off parts of the sensor or drill anything out. Any suggestions?