Replace the entire converter assembly in order to properly service the 3-way catalytic converter.

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Disconnect the Heated Oxygen Sensor connector. Refer to Heated Oxygen Sensor 1 Replacement in Engine Controls
3. Remove the exhaust manifold pipe nuts from the exhaust manifold pipe studs.



4. Remove the catalytic converter nuts from the exhaust pipe.
5. Remove the 3-way catalytic converter.

Notice: To prevent internal damage to the flexible coupling of the catalytic converter assembly, the converter must be supported. The vertical movement at the rear of the catalytic converter assembly must not exceed 6 degrees up or down.

1. Install a new catalytic converter gasket.
2. Install a new exhaust manifold pipe gasket.
3. Position and support the new 3-way catalytic converter under the vehicle.
4. Install the exhaust pipe to the 3-way catalytic converter with the catalytic converter nuts. Do not tighten the nuts.




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.

5. Install the exhaust manifold pipe nuts to the exhaust manifold pipe studs.

Tighten

•	Tighten the exhaust manifold pipe nuts to the exhaust manifold pipe stud to 35 N·m (26 lb ft).

•	Tighten the catalytic converter nuts to 34 N·m (25 lb ft).

6. Lower the vehicle.