Bonneville V8-4.6L VIN Y (2004)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1
HEATED OXYGEN SENSOR (HO2S) REPLACEMENT BANK 1 SENSOR 1
REMOVAL PROCEDURE
NOTE: Refer to Oxygen Sensor Notice in Service Precautions.
IMPORTANT
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Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.
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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.
1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Support rear of the powertrain frame.
3. Remove four rear frame bolts.
4. Lower the frame no more than 73.2 mm (3 inches).
5. Disconnect the rear oxygen sensor electrical connector.
6. Remove the rear oxygen sensor from the rear exhaust manifold.
INSTALLATION PROCEDURE
NOTE: Refer to Fastener Notice in Service Precautions.
1. Install the rear oxygen sensor in the rear exhaust manifold.
Tighten the rear heated oxygen sensor (HO2S) sensor to 41 N.m (30 lb ft).
2. Connect the rear oxygen sensor connector.
3. Raise the frame.
4. Install the four rear frame bolts.
Tighten the frame bolts to 100 N.m (74 lb ft).
5. Lower the vehicle.