Hey guys. I'm trying to fix a rich condition in my car in order to pass emissions, so I bought a new O2 sensor, and I cant figure out how to get enough leverage to get the old one out. Do I need to wait till the engine has cooled down so that the metal can expand or contract or whatever.

Is this easiest to go at from the top? Or the bottom? I tried both but I found it easier to put my wrench on the old sensor from the top. Leverage seemed to be allright one I stuck a screwdriver through the wrench, from the top.

Any hinters on how to get these O2's out will be of much help thanks guys in advanced

 

Here is my end all solution.....




Assasinate the emissions *****!!!!!!!!

 

well metal should expand when cold, so it should be better with it warm.

 

Amen mdricken !

Anyways, i will try it with the car cold in the morning (so the headers dont burn me lol), and go back to the Emissions place and run it. I think I have like half a tank, so I'll probably put like 4 or 5 bottles of that STP fuel cleaner or whatever it is (red bottle lol) in my car. How much is too much of that STP stuff before it stops letting the car detonate?

 

What I ended up doing was to hold a wrench on to it from the bottom, then pass a rope through the ring end and out the side and got my bro and dad to pull on the ropes. With 3 of us pulling on it, it finally turned...... this is after plenty of penetrating oil was applied.

Si.

 

With an O2 wrench, you can easily reach it from above. You can rent them from your local Auto Zone(money back when you return it). Otherwise, a 22mm crow's foot on a rachet will work very nicely from underneath.

The Delco sensor had anti-seize on it, so it shouldn't be difficult to remove, hot or cold. You prolly just haven't gotten the wrench on it securely to give it a good turn.

As for fuel system cleaners, I'd think you can put too much in, but maybe not. BUT some say to run them through a tankful and then refill with fresh gas(no cleaner) before you get tested. Just a guess, but the cleaner's gonna be cleaning and blowing crap through your exhaust, and you prolly don't want that during your test.

Another important thing is to run the car for awhile to get the engine good and HOT. That can make the difference between an older engine failing or passing. So go for a nice drive before you head for your test station.