Getting old O2 sensor out?

[gloryaccordy]

I finally got a new O2 sensor, but the old one is stuck in there pretty good, and with it being under the car it's hard to get the necessary leverage. Plus, I can't find my breaker bar. Anyways how can I get it out? I'm gonna see if a shop will just take it out for me.

[cp[mike]]

o2 tool and borrow a breaker bar. its in there tight, but not that tight.

[Granite CB7]

If you DIY, heat (propane torch) the area of the dp around the o2 sensor (bung) so that the metal expands away from it. Either the o2 tool or a large crescent wrench. I used the crescent wrench but a big 15" one I had!

Dan

[ZcMack]

i had this same trouble. real easy fix. either cut the old wires or take off the harness first and get a box wrench in the proper size over the o2 sensor. no problem, provided you've got a big enough wrench.


if at first you don't succeed, spray a shit ton of pipe break on there.




oh yeah, and if you do it after driving it'll help too, the pipes will be warm (constricted a bit) and that'll work in your favor.

[cp[mike]]

oh i forgot to mention the easy way!

if you have a new o2 to replace it, smash the whole top of it off, so its just a single nut remaining. then its easy to fit a big box-end wrench in there.

[gloryaccordy]

oh i forgot to mention the easy way!

if you have a new o2 to replace it, smash the whole top of it off, so its just a single nut remaining. then its easy to fit a big box-end wrench in there.

Just hit it with a hammer or something? I'll give it a shot. Somehow I get the feeling a deep socket will do the trick though.

[cp[mike]]

i just slide my body under the car and kick the wrench as hard as i can

a deep enough socket will work if you cut the wires off... but you wont have much room to get a breaker bar in there with the socket sticking up so high...

[4GAccordH22]

Lots of penetrating lube (wd-40, liquid wrench, stuff like that)... That's what I did

[gloryaccordy]

i just slide my body under the car and kick the wrench as hard as i can

a deep enough socket will work if you cut the wires off... but you wont have much room to get a breaker bar in there with the socket sticking up so high...

Well my socket completely separated from the sensor...so I don't imagine that being much of a problem.

[gloryaccordy]

I got it out and put the new one in. Hooray! No more CEL!!!

The old one was toast. If I wasn't lazy I would have taken a picture. Oh well...here's to respectable gas mileage!