>I noticed that there is a
>coupler in the exhaust manifold that acts like a reducer, perhaps your new
>O2 sensor will fit if you remove the reducer? Sometimes the reducer comes
>off with the O2 sensor (mine did). When I unscrewed the old sensor the
>coupler was fused to it and both pieces unscrewed from the cast iron
>exhaust manifold. It too some effort to separate the threaded coupling
>from the old sensor, I had to destroy the old sensor in the process.
He is dead right. The "reducer"/collar thingy (technical term for ya...) is
a royal PITA to get loose from the old sensor. It took me and a friend
several minutes of straining and grunting to break mine loose. I changed the
O2 in a friends 94 SE recently, and his may as well have been welded on--the
collar absolutely would not budge, even after heating it with a propane
torch (which is a fairly effective trick, if you haven't tried it). I ended
up just giving him my old collar, since I have headers that are threaded so
that the sensor goes directly in.
Hope this helps,
JWolfe
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