Catalytic Converter Replacement L18

1. Raise and suitably support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.
2. Support and raise the transmission using a suitable transmission jack.
3. Remove the transmission mount nuts.



4. Remove the transmission support nuts and bolts.
5. Remove the transmission support from the vehicle.



6. Disconnect the oxygen sensors electrical connectors.
7. Remove the catalytic converter nuts.
8. Remove and discard the exhaust manifold seals.



9. Remove the exhaust muffler nuts.
10. Remove catalytic converter.
11. Remove and discard the catalytic converter gasket.

1. Install a NEW catalytic converter gasket to the converter.
2. Install catalytic converter.
3. Loosely install the exhaust muffler nuts.



4. Install NEW exhaust manifold seals.
5. Loosely install the catalytic converter 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.

6. Tighten the catalytic converter and exhaust muffler nuts.

Tighten

1. Tighten the catalytic converter nuts to 64 N·m (47 lb ft).
2. Tighten the exhaust muffler nuts to 64 N·m (47 lb ft).
7. Connect the oxygen sensors electrical connectors.



8. Install the transmission support to the vehicle.
9. Install the transmission support nuts and bolts.

Tighten
Tighten the transmission support nuts and bolts to 70 N·m (52 lb ft).

10. Lower and remove the transmission jack.



11. Install the transmission mount nuts.

Tighten
Tighten the transmission mount nut to 40 N·m (30 lb ft).

12. Lower the vehicle.