XJR (X300) L6-4.0L SC (AJ16) (1995)
Oxygen Sensor: Technical Service Bulletins
Engine Controls - Removal of Seized Oxygen (O2) Sensors
NUMBER: JAGA309-001
*(ISSUE 2)*
*DATE: 29 APR 2008*
MODEL: ALL
THIS ISSUE REPLACES JAGA309-001, ISSUED 11 SEP 2006. CHANGES ARE SHOWN WITH ASTERISKS.
SECTION: 309 - EXHAUST SYSTEM
REMOVAL OF SEIZED OXYGEN (O2) SENSORS
AFFECTED VEHICLE RANGE:
ALL
VIN:
ALL
MODEL YEAR: ALL
CONDITION SUMMARY:
REMOVING O2 SENSORS WITH SEIZED THREADS
CAUTION:
This procedure applies to all O2 exhaust gas sensors. Oxygen sensor breakaway torque must not exceed 70 Nm (52 lbf-ft). A breakaway torque
exceeding 70 Nm (52 lbf-ft) may indicate that the threads have become seized. Damage to the exhaust catalyst threads may occur if breakaway
torque application exceeds 70 Nm (52 lbf-ft).
Situation:
This information only bulletin has been issued to inform Dealers of a procedure to remove any O2 sensor with seized threads. This method has been
developed to minimize damage to the exhaust catalyst threads while attempting to remove any O2 sensor from an exhaust catalyst where the threads may
have become seized.
Action:
When removing any O2 sensor, should the breakaway torque exceed 70 Nm (52 lbf-ft), refer to the Repair Procedure detailed in this bulletin to remove
the O2 sensor.
PARTS
WARRANTY:
No warranty. Information purposes only.
Normal warranty policy and procedures apply.
REPAIR PROCEDURE
REMOVING AN OXYGEN (O2) SENSOR WITH SEIZED THREADS
CAUTION:
If an O2 sensor breakaway torque exceeds 70 Nm (52 lbf-ft), do NOT apply additional torque. The threads may have become seized and
damage to the catalyst threads may occur with additional torque application.
*WARNING:
Use care to not cut or damage the O2 sensor electrical connector or attached wiring.*
1.
Disconnect the O2 sensor electrical connector.
NOTE:
Upon removal, a 'seized' O2 sensor may turn 90 - 270° before reaching the breakaway torque threshold.