The catalytic converter is serviced by replacing the entire assembly. Always replace the gasket at the rear flange when servicing the catalytic converter. Never reinstall the original gasket.

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

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.

2. Suitably support the exhaust system.



3. Remove the catalytic converter bolts.
4. Remove the catalytic converter gasket.



5. Remove the exhaust manifold pipe stud nuts.
6. Remove the catalytic converter.
7. Remove the exhaust manifold pipe seal.
8. Inspect the seal. Replace as necessary.

1. Install the exhaust manifold pipe seal.

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.

2. Install and support the catalytic converter.

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.

3. Install the exhaust manifold pipe stud nuts.

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




4. Install the catalytic converter gasket.
5. Install the catalytic converter bolts.

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

6. Remove the support from the exhaust system.
7. Inspect for leaks and underbody contact.
8. Lower the vehicle.