Oxygen Sensor Replacement

[Louis Baiani]

I was wondering, does anyone have experience with O2 sensor
replacement?  I have an 84 Century, and the sensor was replaced by a
mechanic who did work on the car in the past.  In the manual, it shows
that a clearance of 8mm should be maintained between the boot and the
base to ensure proper sampling of ambient air.  Is this true?  I have an
aftermarket Bosch sensor - is it different from the original in that it
wouldn't require this gap?

Louis

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