Catalytic Converter Replacement - Left Side 5.7L Engine

Caution: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

Caution: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury.

1. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement .
2. Remove the connector position assurance (CPA) lock.
3. Disconnect the oxygen sensor electrical connector.
4. Remove the oxygen sensor.



5. Remove the exhaust manifold nuts (1).
6. Remove the left catalytic converter and gasket (2).

Notice: When inspecting or replacing exhaust system components, make sure there is adequate clearance from all points on the underbody to prevent overheating of the floor pan and possible damage to the passenger compartment insulation and trim materials.

1. Install a NEW catalytic converter gasket (2).
2. Install the left 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 nuts (1).

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




4. Install the oxygen sensor.

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

5. Connect the oxygen sensor electrical connector.
6. Install the CPA lock.
7. Install the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement .