LSS V6-3.8L VIN K (1997)
Oxygen Sensor: Service and Repair
NOTICE: The Heated Oxygen Sensor (H02S) and the Oxygen Sensor use a permanently attached pigtail and connector. Do not remove this pigtail from
the Heated Oxygen Sensor. Damage or the removal of the pigtail or the connector could affect the proper operation of the sensor.
Take care when handling the HO2S and the O2S. Keep the in-line electrical connector and the louvered end free of grease, dirt, or other contaminants.
Also avoid using cleaning solvents of any type. Do not drop the HO2S or the O2S. Do not roughly handle the HO2S or the O2S.
IMPORTANT: Take care when handling the heated oxygen sensor. The in-line electrical connector and louvered end must be kept free of grease, dirt or
other contaminants. Also, avoid using cleaning solvents of any type. Do not drop or roughly handle the heated oxygen sensor/catalyst monitor. A
dropped sensor is a bad sensor.
NOTICE: Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.
NOTICE: Take care when handling oxygen sensors. The electrical connector and louvered end must be kept free of contaminants. Do not use cleaning
solvents on the sensor. Do not drop or mishandle the sensor.
NOTICE: A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the
threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.
REMOVAL PROCEDURE
IMPORTANT: The heated oxygen sensor may be difficult to remove when engine temperature is below 48°C (120°F). Excessive force may damage
threads in exhaust manifold or exhaust pipe.
1. If HO2S 2 is being replaced, raise the vehicle.
2. Electrical connector.
3. Carefully back out heated oxygen sensor.
INSTALLATION PROCEDURE
IMPORTANT: A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of graphite suspended in fluid and
glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have
the compound applied to the threads. If a sensor is removed from an engine and if for any reason is to be reinstalled, the threads must have anti-seize
compound applied before reinstallation.
1. Coat the threads of heated oxygen sensor/catalyst monitor with anti-seize compound P/N 5613695, or equivalent if necessary.
2. Install the Heated Oxygen Sensor. Torque the Heated Oxygen Sensor to 41 N.m (30 lb ft).
3. Connect the electrical connector.
