How much of a bitch is to get a almost 10 year old o2 sensor out of an exhaust manifold on a 99 si?.. [I remember trying to pull the one on my camaro being unreal, after PB blasting it and using a 7/8" wrench with a 3 foot pipe on the end of it all it did was begin to round off the hex but not break loose the littlest bit, and this is a car that has never been driven in the snow and very rarely in the rain.]

Also what size is the hex on the o2 sensor (i.e. what size wrench do I need)?

 

stop posting the same thing ten times.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DCSportEJ1Civic &raquo;</TD></TR><TR><TD CLASS="quote">stop posting the same thing ten times.</TD></TR></TABLE>

There all different questions revolving around the same topic...

 

22mm or 7/8" wrench, o2 socket.
I have used brake fluid on o2 sensors, instead of pb blaster.. it absorbs any moister, gets the rust off of it..
Stubborn sensors I usually give it a quick whack with a hammer.