started doin regular tune up by myself last weekend since my 99 Si hit 120k miles
CEL light came on cos of primary O2 sensor so main part of this tune up is changin the O2 sensor
but the problem is I've been tryin to break loose the sensor but I couldn't
ran the car like 15 min then spray PB on the thread and use sensor wrench already
no work are done so far
call dealership......charge me 80 bucks and still sayin they might not be able to loose it plus got to wait until next monday
mean I hv to stuck at home til then.....(this car is my only ride)
So anyone hv any suggestion?
Thx

 

Should be a 7/8ths wrench size. Sometimes PB takes a little bit to work its magic. Best thing you can do is get some kind of breaker bar to fit over the wrench to gain some leverage on it. If that fails, you can always try taking a torch to its base and heat it up just a little to loosen it up.

 

I know how those O2 sensors get rusted in & I'd be afraid of breaking a stud off trying to break the damned thing loose.

Maybe pick up a cheap header like a Megan Racing just so you have a new header that isn't all rusted to hell so you can get your new O2 sensor screwed into it.

 

found the megan's one costs about 200
then should I get this mugen one for the same price?
http://cgi.ebay.com/ebaymotors...52878

 

22mm spanner and a hammer. if its that jammed then a few taps on the end of the spanner with the hammer works a treat

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carlsberg &raquo;</TD></TR><TR><TD CLASS="quote">22mm spanner and a hammer. if its that jammed then a few taps on the end of the spanner with the hammer works a treat</TD></TR></TABLE>

I had to look up what a spanner was. You're better off using a spanner with a 5 or 6 foot poll on it to try to break it loose. Those O2 sensors are a bitch to get out.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by joe.wong321 &raquo;</TD></TR><TR><TD CLASS="quote">found the megan's one costs about 200
then should I get this mugen one for the same price?
http://cgi.ebay.com/ebaymotors...52878
</TD></TR></TABLE>

Damn, I thought they were only around $70-80.

 

i just threw some megans racing headers on my b20 and they're clean for the $60 i paid for them (used) of course... but they're great condition. And all I did was take an open ended wrench and pulled REALLY hard... For any bolts I couldn't get off I just used engine degreaser. The only problem is my o2 sensor on the headers doesn't line up. so now im trying to seal it in crooked otherwise it'll grind on the axle. hope that helps somewhat

 

I'm with ej6mike, i just took my o2 off my 235k mi. z6, some PB blaster and a strong arm is all you need .

 

wth the metal constanlty being heated up and then cooled the o2 sensor is set in tight.

 

easiest way to remove any O2 sensor the first time, with minimal effort. (all though burns are possible if you're not careful)

start car, let car idle till car is warm. Turn off car.
grab sensor with spanner wrench and turn out.

the addition of heat make all the difference in the world.

 

ran into this too many times....ummm.. Get some Vise Grips and a pipe that will fit around them clamp the **** out of the sensor "reallyyyyy hard" and stand on the pipe and just give it hell. i also heated mine up with the propane torch to helped a lil. good luck