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 John Larson <jdlarson@ix.netcom.com> said, in part:

Re: John Lajza`s message, John, never use RTV silicone in a vehicle with
an O2 sensor,as it`s a potential cause of sensor death, and you know how
that hurts. I just wouldn`t do it. Been to too many Bosch classes and
seminars where they told us not to. 
_ _ _ _ _ _
This is a pretty general statement John, and surprising to me.  RTV
outgasses acetic acid while it cures and then is relatively inert.  Are you
saying to not use it where the outgassing could get to the sensor, or where
chunks of cured rubber can be burned in the engine and the effluent get to
the sensor, or anywhere near the sensor, or anywhere on the car, or anywhere
in the same driveway, or ....  I used it to temporarily fix a tear in my
"octopus" hose, curing it off the vehicle, and there was no apparent effect
on the sensor after it was re-installed, nor would I expect one.  Could you
enlighten us with Bosch's exact words, as best you remember them, so we can
judge how and when to avoid problems in the future.

                .... Kirby   (Kirby A. Smith)
                              2 x 1988 90q
                          New Hampshire USA