Front and Rear 02 Sensors OBD1

I need to replace both of mine. What size are they and how do I take them off?

http://stealth316.com/2-oxygensensor.htm

I was able to get the front off using an open end wrench from underneath without removing anything else.

Thanks for that. The size is 7/8" on the hex of the sensor.

Ya almost all 02 sensors including the AEM ones are 7/8. Some of the autozone type non-OEM replacements are wierd sizes though.

I can not get my front sensor to come loose, I am about to strip it, what do you guys do?

Is there no way for you to impact it? Hit the wrench with a hammer? You might need to try that 50/50 ATF/Acetone mix and tell us how it works.

I need to use a flared wrench,

you trying with an open end wrench? since you are getting rid of them cut off the connector if you cant fit the wrench over it, and use the closed end. Otherwise try and pick up an 02 sensor socket form a parts store, they work well for breaking them loose.

Yeah I just bought an o2 sensor socket and pb blaster to see if this does the trick. Thanks for the help guys..3sgto ftw.

I used the autozone rent a tool O2 sensor remover tool. Worked great!

I replaced my o2 sensors with these:
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT