"Normal" O2 sensor

[Bruce Plecan]

Speaking of protection from the dragons breath.
How about using the spark plug antifoulers to space it more out of the
exhuast stream, when using oem mountings?.
Grumpy



> >I guess this data might well be classified as 'Extraneous'.
> >
> >Fact: Blown head gasket pumping copious amounts of anti freeze
> >and oil out the exhaust system.
> >...
> >I suspect the long trips which involve extended turbo use and
> >associated higher exhaust temps, 'clean?' the sensor. Just a
> >feeling not based on measurements. Oh yes, before I forget, the
> >sensor was tested recently and pronounced "well within spec",
> >whatever that means.
>
> I dunno why "extraneous"?; a known on-the-spot counter-example IS data,
> ya know. :)  Now if you'd said you blew a head gasket and your O2 sensor
> died 5yrs later right after a visit to Aunt Minnie's, I might consider
> THAT extraneous. :)  Or casting serious suspicion on Aunt Minnie's
> chilly.
>
> All we seem to get are rumors on this contamination issue, which was why
> I was trolling for more "factual" inputs like the above (consider it an
> unwanted experiment Mother Science forced you into, just for this
> purpose/destiny :). I've "heard" (once again, just people writing what
> they "think" they saw on a darkNcloudy night when the lightning cast a
> shadow, ifyaknowadamean) that carbon contamination from losing a valve
> seal or the like, and then having it repaired sorta fairly soon, had
> left the O2 sensor either lazy or sleepy, only to come back to life
> after some more driving after the repairs and oil source was removed. It
> may be that the source of contamination from antifreeze is ALSO a
> reversible contamination process. Who knows?
>
> BUTTTTTTT.... [caution, Farkle SES light is lit]
>
> You wanna hear the juiciest of ALL O2 contamination rumors; I mean this
> has gotta be the MOTHER of all O2 contamination rumors, and especially
> as you'll see how it could affect the important is$ue of contaminating
> WB O2 sensors with leaded racing gas, AND why the huge spread of results
> people have been seeing on lead contamination (or not) with leaded
> racing gas on WBs.
>
> OK, drum roll.......I've been told this by two different sources in
> private (juicier by the minute, huh?), OK two different private RELIABLE
> sources (heh heh, better huh?), AND actually the subject came up because
> I (MOI, ME, yeah this dweeb) was having the same suspicions from what
> we'd been seeing with EGOR on lead, and brought up the question. So I
> was sorta sniffing around for "explanations" (ya know, intellectually,
> nature abhors a vacuum too, in more ways than one :).
>
> OK, OK, I won't leave you hangin any longer... There's this "theory"
> that if you "condition" the sensor in an unleaded environment for a
> goodly few hours, and get it coated up with whatever deposits ARE normal
> for unleaded-gas exhaust system deposits (ya know, the ones we know
> DON'T harm an O2 sensor, other than age it some), and THEN you expose
> the sensor to leaded gas, somehow the normal deposits protect it or at
> least considerably delay it's contamination from the subsequent lead
> exposure. OR maybe there's a layer that's constantly being deposited and
> spalled off, and if you start with a goodly thickness of more harmless
> layer, and later slobber some lead on it nowNthen, it gets cleaned off
> without permanent damage.
>
> BUT woe be told if you start a brand new O2 sensor off with leaded gas
> from the get-go and it get's directly in the pores and under the skin,
> sotaspeak; it will be in O2-sensor heaven in short order. Remember, what
> you've just read is a RUMOR, not science, OK? So PULLLEEZEE don't go
> quoting me as "Garfield said...nah nah nah".
>
> Hell, I dunno; this is darts ya know, not science. An idea you think of
> when you're on the floor, lamenting, "I've fallen, and can't reach my
> beer". Heh.
>
> This would explain why we can't seem to kill one with lead, because ALL
> our repertoire of O2 performers here ALL were run for considerable time
> in unleaded testing first, before we got up the courage to expose the
> two we put aside for said destructive testing, that we did consign to
> eventual murder-by-lead. So far, no murder; not even a hint of
> aging/degradation.
>
> Unfortunately, nobody I know of has been paying that close attention to
> the history of their sensors, to see if there's a forceful correlation;
> it's just something that more than a few people have begun to suspect,
> thinking back at how their sensors were used in the beginning, and which
> ones got hit with the lead early vrs late in life.
>
> See now I told you that was a juicy rumor. And ya know what, just wadaya
> spose will be the almost immediate outcome of us diligently spreading
> this rumor around as fact!? Huh?? YEP, you guessed it, vendors will
> forthwith spring up, offering an O2 sensor Conditioning Service!!! You
> bet. Heh.
>
> OR we'll see people saying, "we can't guarantee our WB O2 sensors for
> even one hour of exposure to leaded fuel, unless you buy them *directly*
> from us, cuz we slather on some special salsa on them at the 'factory'
> here, and then shake'mNbake'm till their properly conditioned."
>
> Then there'll be ads all over the place on how "You can make money while
> JUST driving your car around". All you have to do is install a few
> hundred O2 sensor bungs along your exhaust pipes, and O2 sensor vendors
> will PAY you to condition sensors for them! Yup, a regular cottage
> industry will form; I can see it know.
>
> Oooops, I forgot, it's way past my time to take my medication.
>
> Garfarkle
>
>
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