For 1990-2009 cars

#### Tools Required

J 39194-B Oxygen Sensor Wrench

### Removal Procedure

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Disconnect the pre and post heated oxygen sensor connectors.
3. Remove the muffler pipe flange bolts.
4. Remove the exhaust manifold flange nuts.
5. Remove the catalytic converter support bracket bolts.
6. Remove the catalytic converters from the muffler pipe flange.
7. Remove the muffler pipe flange gasket.
8. Use J 39194-B to remove the heated oxygen sensors.

### Installation Procedure

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

1. Use J 39194-B to install the heated oxygen sensors.

Tighten
Tighten the heated oxygen sensor to 42 N·m (31 lb ft).

2. Install the muffler pipe flange gasket.
3. Install the catalytic converters to the muffler pipe flange.
4. Install the catalytic converter support bracket bolts.

Tighten
Tighten the catalytic converter support bracket bolts to 20 N·m (15 lb ft).

5. Install the exhaust manifold flange nuts.

Tighten
Tighten the exhaust manifold flange nuts to 25 N·m (18 lb ft).

6. Install the muffler pipe flange nuts.

Tighten
Tighten the muffler pipe flange nuts to 40 N·m (30 lb ft).

7. Connect the pre and post heated oxygen sensor connectors.
8. Inspect all exhaust system clearances. Refer to Exhaust System Clearances .
9. Start the engine and inspect the exhaust system for leaks.
10. Lower the vehicle.