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Oxygen Sensor: Installation

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CAUTION: Correct tightening of oxygen sensor is critical to prevent crushing glass beads in graphite anti-seize compound. Crushing glass beads will cause sensor to seize in exhaust manifold. This may necessitate replacement of exhaust manifold upon next removal.
  1. Whenever oxygen sensor is removed, coat threads with anti-seize compound before reinstallation. New oxygen sensors already have this compound applied to threads.
  2. Install oxygen sensor in exhaust pipe. Tighten oxygen sensor to specification. See TORQUE SPECIFICATIONS . Reconnect harness connector to oxygen sensor. Lower vehicle and test system.
Fig 1: Locating Heated Oxygen Sensors (4.3L Shown; Others Are Similar)
G00147744Courtesy of GENERAL MOTORS CORP.