Removing rear o2 sensor on Evo IX
Sep 9, 2008, 02:05 PM
#17
Evolving Member
I don't have the special O2 Sensor removal tool. What size wrench could I use to remove it. Also, is the O2 sensor for the turbo outlet housing and cat the same. Thanks guys gals.
Sep 15, 2008, 11:53 AM
#19
Evolving Member
^Thanks^. I was talking with my neighbor and he recommended that I heat it up with a torch and spray WD40 on it. With a bit of brute force it came off without stripping or breaking. 
Dec 31, 2009, 11:38 AM
#20
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Any bolts having to do with the exhaust piping should be taken out with patience and care. It's a bigger headache to get a rounded/broken bolt than waiting to soak it with pb blaster or something.
Nov 24, 2017, 06:52 PM
#21
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I just got done installing a high flow cat on my Evo IX and it was a absolutely painful taking off those bolts and the O2 Sensor. Breaker Bar is your only friend. Start off with it and you’ll be fine, I started to round the tips of my bolts and immediately went all out w the breaker bar and it was used to get every bolt out, even the sensor.
Nov 24, 2017, 10:35 PM
#23
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