I have to replace my front 02 sensors. Any words of wisdom before I start?
Thanks

 

Yes. Unplug your battery. 7/8th's open end wrenches are your friend. Disconnect the old sensor before trying to unscrew it. Don't connect the new sensor until its screwed in all the way. A little anti-sieze goes a long way. Beware of fish that jump in boat.

 

a little bit (keyword little) antiseize, and do not over torque on 'em

 

my advice to u is make sure they aren't any young children around when you try to break the old O2s loose. if they weren't anti-seized last time they went in, you are more than likely going to be cursing in 6 languages at your bruised knuckles....

realistically, there is no reason whatsoever to unplug the battery if the ignition isnt on (and why should it be?) when you unplug the sensors. you'll be screwing up your radio clock and station presets (and if u have a stock radio you could have serious issues with the "theftlock" system on it). on top of that if you have them unplugged long enough, the PCM will reset itself and the car will run sluggishly for 50-100 miles while it relearns all of the fuel and timing curves.

 

You can pick up an "O2 Sensor Socket" from AutoZone. It's a socket with a notch down the side. That way, the wiring pigtail can stick out the side and lets you use a socket wrench rather a box wrench.

 

DO NOT get anti-seize on the sensor, keep it on the threads. It can/will foul it just like a spark plug.

 

I'll simply repeat the above advice... DO NOT USE ANTI SIEZE. My AC/Delco factory replacement sensors were marked right on the wrapping that they were already coated with the correct, conductive anti-sieze compound.

Do not use any sort of sealant, or even expose any part of the sensor, inside element or outside body to any chemicals or oil. Do not cut the sensor wires if you need to make extensions... cut the harness wires only.