The three way catalytic converter is serviced by replacing the entire assembly. Always replace the gaskets at the front and rear flanges when servicing the three way catalytic converter assembly. Never reinstall the original gaskets.

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Support the three way catalytic converter and the exhaust muffler.



3. Remove the exhaust manifold pipe nuts from the exhaust manifold.
4. Remove the catalytic converter bolts from the exhaust pipe at the three way catalytic converter.



5. Remove the three way catalytic converter.
6. Remove the exhaust manifold pipe gasket from the three way catalytic converter front flange.



7. Remove the catalytic converter gasket from the three way catalytic converter rear flange.

1. Install a new catalytic converter gasket to the three way catalytic converter rear flange.



2. Install a new exhaust manifold pipe gasket to the three way catalytic converter front flange.




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.

3. Install the new three way catalytic converter. Support the converter.
4. Install the catalytic converter bolts.
5. Install the exhaust manifold pipe nuts to the exhaust manifold pipe studs.

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.

Tighten

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

•	Tighten the catalytic converter bolts to 45 N·m (33 lb ft).

6. Lower the vehicle.