O2 sensor nuts
#1
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O2 sensor nuts
I'm having difficulty replacing my 02 sensor. I've PB blasted the nuts and I'm trying to figure out what size the nuts they are. Anybody have an idea or have any tips? I have a 1991 4wd 22re. Thanks!
#3
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I soaked mine with PB Blaster for about a week, then used a steel brush on them, then ended up cutting into them with a Dremel/air grinder. Be careful not to hit the stud threads.
Once you take out an edge with the dremel, they should come right off. They are either 10 or 12 mm, six point.
Once you take out an edge with the dremel, they should come right off. They are either 10 or 12 mm, six point.
#6
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might help if you run the motor long enough to warm the exhaust. a little heat helps a lot just don't burn yourself.
Last edited by DudeBud; 06-02-2007 at 10:13 PM.
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#11
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i can get mine off. so then i planned on taking the whole downpipe off but i cant get that off either. the bolts are so ˟˟˟˟˟˟ rusted. drenched in PB blaster and the bolts just do not turn. the head of the bolts just bends and strips.
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i had to take the whole pipe off and change it... Former owner had welded a bung on and used a cheapo thread on 02 sensor tho
#14
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i have a full cat back so i cant be cutting things off. right now im looking for a good replacement to compliment my cat back. i want a downpipe with a high flow cat that i can bolt on.2 1/4 insh. the nearest reasonablely priced muffler shop around me is operated by a full on coke addict.
#16
Wizard wheel and replace them with new studs and nuts. I have never had any luck with penetrating oils because as soon as you drive the oil is burned off .
Last edited by PistonSlap; 06-04-2007 at 05:43 AM.
#17
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If it is a 12mm socket, it'll be an M8-1.25mm nut. I have an LC Engr. header on my '85 and use a pair of stainless steel bolts, nuts, lock washers for mine and it works great. Been on for about 8 years now and comes off as easy now as the day I installed the header.
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