Replacing O2 sensors (Pre-Cats)
05-02-2011, 10:44 PM
#2
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i used die electric on mine, and i bought the socket. worked great i used my ratchet,extension,o2 socket and my bar from cherry picker for leverage. took like 5 mins for both o2's.
05-03-2011, 08:14 AM
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they should come with anti-seize on the threads right out of the box. you can either use an oxygen sensor socket or a 7/8" wrench, depending on the accessibility in your engine bay
05-03-2011, 10:22 PM
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If you have headers already it is definitely an undercar procedure, for manifolds I would think it would be easier from underneath as well. They don't have anti-seize on the threads out of the box, they come with a small tube of copper based stuff you apply yourself, I just used a new set on my BBK install.
05-04-2011, 04:50 PM
#7
02 sensors are like spark plugs.....don't tighten them too much. Literally snug them with a wrench, then give it one more medium tug, nothing crazy. Also, before you plug it in spin the wires in the direction where if the 02 sensor did somehow start to come loose, the twisted wire will put pressure in the "tightening" direction. Then there is no possible way it can come out. No anti-seize needed. My 02 sensors came out with a small amount of pressure on the wrench after 6 years.
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05-05-2011, 10:46 AM
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02 sensors are like spark plugs.....don't tighten them too much. Literally snug them with a wrench, then give it one more medium tug, nothing crazy. Also, before you plug it in spin the wires in the direction where if the 02 sensor did somehow start to come loose, the twisted wire will put pressure in the "tightening" direction. Then there is no possible way it can come out. No anti-seize needed. My 02 sensors came out with a small amount of pressure on the wrench after 6 years.
05-05-2011, 12:15 PM
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took me like 10 mins to get mine off and replaced. the toughest part is getting them to break loose but i used leverage and it came right out, it probably helped my car has never been in rust belt just chilling in sunny Florida weather haha.
