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O2 Replacement

This is a discussion on O2 Replacement within the General Help forums, part of the LSx Technical Help Section category; I am in the midst of swapping in a set of LT's. Upon pulling my front O2's it appears that ...

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    O2 Replacement

    I am in the midst of swapping in a set of LT's. Upon pulling my front O2's it appears that one is most likely original and the other has been replaced at some point. I understand that the sensors degrade over time and that they should be replaced somewhere between 75,000 - 100,000 miles. As our car is creeping up on 74,000, and I am working on the exhaust system, now would be a good time.

    I have read somewhere on here that utilizing Corvette O2's is recommended as they provide faster feedback to the PCM. However, no details or part numbers were provided. Any recommendations on what to get, what to avoid and so forth? The rear O2 sensors will be removed and deleted in my tune, so they are not an issue.

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    cutting and welding mark21742's Avatar
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    Its a Bosch sensor, can't remember the part number either, but Frost had them on his site awhile back, you might check there

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    Bosch 1311.

    Denso makes the OEM o2's but they are more $$$$ and I don't remember the part #

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    Thanks guys.

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    Veteran 0rion's Avatar
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    bosch 13111

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    Junior Member 1leathalLs1's Avatar
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    i have heard that the bosch ones arent real good? Any truth tothis?

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    Veteran 0rion's Avatar
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    Quote Originally Posted by 1leathalLs1 View Post
    i have heard that the bosch ones arent real good? Any truth tothis?
    I've read that too but me and firebirdjones both went to the 13111 after having heater codes and what not. Been running mine 2 years I think and not 1 single issue or heater code. It'd be hard to convince me they aren't any good.

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    That guy thearborbarber's Avatar
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    I have a 1 1/2 on my bosch O2's and they work fine. No problems at all. After my headers were installed I ran the old ones till the coating baked in and then switched to new ones.

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    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by 0rion View Post
    I've read that too but me and firebirdjones both went to the 13111 after having heater codes and what not. Been running mine 2 years I think and not 1 single issue or heater code. It'd be hard to convince me they aren't any good.
    Yep, I switched at that time to the Bosch per Orion's recommendation. I haven't had any problems since.

    Wow has it been 2 years already Orion??

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    Moderator 35th-ANV-SS's Avatar
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    I've also read some bad things about the Bosch, but it sounds like a few people on here have had good success with them.

    I think the bad reviews may have came from people whose tuning wasn't proper and thus premature problems with the O2's.

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    Veteran 0rion's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    Yep, I switched at that time to the Bosch per Orion's recommendation. I haven't had any problems since.

    Wow has it been 2 years already Orion??
    I think it so. I was even thinking this spring might be 3 years but that seems too long. I think it was 2 years ago.

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    Life in the Fast lane sunsetorangess's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    I've also read some bad things about the Bosch, but it sounds like a few people on here have had good success with them.

    I think the bad reviews may have came from people whose tuning wasn't proper and thus premature problems with the O2's.
    Yepp, Too much Fuel and your 02 will take a pooo...
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    2001 SS, Its not the car its the Driver that matters....

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    Life in the Fast lane sunsetorangess's Avatar
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    Yepp, Too much Fuel and your 02 will take a pooo... Iv had mine for about 3 years, no issues
    J

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    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by 0rion View Post
    I think it so. I was even thinking this spring might be 3 years but that seems too long. I think it was 2 years ago.
    I think you are right. Man how time flies. Because I moved out here in Sept of 08 and I did the 02's long before I moved, at least the spring before. So ya it's probably going on 3 years,,,sheeeesh.

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    Ordered a pair of 13111's this afternoon so I should be all set for my header install. I removed the spark plugs and dropped the driver side manifold tonight after pulling all the top side stuff on Sunday. So far, so good. Is it ok to put a dab of anti-seize on the O2 threads as long as I don't get carried away, or is this not necessary with stainless headers?

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    Quote Originally Posted by pajeff02 View Post
    Ordered a pair of 13111's this afternoon so I should be all set for my header install. I removed the spark plugs and dropped the driver side manifold tonight after pulling all the top side stuff on Sunday. So far, so good. Is it ok to put a dab of anti-seize on the O2 threads as long as I don't get carried away, or is this not necessary with stainless headers?
    if memory serves me correctly they already come with a dab on the threads....if not it wouldn't be a bad idea to put some on there.

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    Quote Originally Posted by 0rion View Post
    if memory serves me correctly they already come with a dab on the threads....if not it wouldn't be a bad idea to put some on there.
    Thanks. Just wanted to be sure it was ok to do.

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    Next question: I was a little disappointed at how grimy the Kooks LT's were. They were literally full of metal shavings and other gunk so I hosed them out with brake clean and ran a couple of papertowels soaked in denatured alcohol down each tube to clean them out. I have heard that with ceramic coated headers that the initial start up "burn in period" can harm your O2 sensors. Of course, these are stainless but there is probably still some oil and other stuff that I missed. Should I use my old O2 sensors when I first start the car to allow the LT's to cook off any remaining crap?

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    Quote Originally Posted by pajeff02 View Post
    Next question: I was a little disappointed at how grimy the Kooks LT's were. They were literally full of metal shavings and other gunk so I hosed them out with brake clean and ran a couple of papertowels soaked in denatured alcohol down each tube to clean them out. I have heard that with ceramic coated headers that the initial start up "burn in period" can harm your O2 sensors. Of course, these are stainless but there is probably still some oil and other stuff that I missed. Should I use my old O2 sensors when I first start the car to allow the LT's to cook off any remaining crap?
    that's a tough call really. I don't think there would be enough residue in there to harm anything. If you wanted to be certain use your old ones since changing them really is just a couple of minutes. I probably would just put the new ones in there and call it a day but that's me.

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    Yes that is a good idea, use the old one for the first couple hundred miles, then switch them. I never did that, and I still have my OE sensors, time to change them now anyway. 86k on the car.
    Last edited by Too Fast; 02-03-2010 at 08:07 PM.

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