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Coated Headers & O2 Sensor Fouling

This is a discussion on Coated Headers & O2 Sensor Fouling within the External Engine forums, part of the LSx Technical Help Section category; I have used search and haven't really found out anything. Will ceramic coated headers foul out your O2 sensors when ...

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    Member robert 98's Avatar
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    Coated Headers & O2 Sensor Fouling

    I have used search and haven't really found out anything. Will ceramic coated headers foul out your O2 sensors when they are first installed? If so how long does it take to break them in to where they no longer foul your sensors? Also are the front sensors and the rears the same? From what I can tell they are.

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    Shake and Bake Triple H Coating's Avatar
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    I have never heard of this, but with that being said your exhaust gas will have a higher temp. due to the heat sink that the ceramic causes. I guess it is possible, but again I have never heard of it personally.

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    That guy thearborbarber's Avatar
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    There have been cases of O2's fowling or becoming lazy from header coating. Also the newest 4th gen will be 7 years old so it is a good time to replace them.

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    Member robert 98's Avatar
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    Yeah I'm sure it wouldn't hurt to replace them, but if theres a possibillity of the new headers messing up the sensor I don't want to until whatever residue from the mfg process there may be has burned away,

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    That guy thearborbarber's Avatar
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    That's what I did. I used the old ones for a couple of months and then replaced them with new ones.

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    Member robert 98's Avatar
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    Quote Originally Posted by thearborbarber View Post
    That's what I did. I used the old ones for a couple of months and then replaced them with new ones.
    Cool,thats kinda what I was thinking, thanks man

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    autoconnectionllc.com 02transamce's Avatar
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    i have 1 year old o2s and had no problems with them after installing coated lts.

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    Member robert 98's Avatar
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    Thanks, does anyone know if the front and rear sensors are interchangable

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    autoconnectionllc.com 02transamce's Avatar
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    they are,they do different things,but the part number is the same.

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    Member robert 98's Avatar
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    thanks again

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    Member DaddySS's Avatar
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    Quote Originally Posted by thearborbarber View Post
    That's what I did. I used the old ones for a couple of months and then replaced them with new ones.
    That's good advice whether the headers are coated or not. Rust inhibitor on steel headers, cleaning chemicals left over from production, etc. all can cause sensor problems. I recommend always at least heat cycle new headers a couple of time with old sensors then install the new or good ones.

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