Catalytic Converter Replacement RPOs L26/L32

Important: The catalytic converter is serviced by replacing the entire assembly. Always replace the gaskets at the front and rear flanges when servicing the catalytic converter. Never install the original gasket.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
3. Remove the catalytic converter pipe stud nuts (2).
4. Remove the catalytic converter pipe gasket (1).
5. Support the exhaust system.



6. Remove the catalytic converter nuts.



7. Remove the catalytic converter hangers.
8. Remove the catalytic converter.
9. Remove the catalytic converter gasket.
10. Clean and inspect the exhaust manifold and the exhaust pipe gasket mating surfaces.
11. Remove the HO2S. Refer to Heated Oxygen Sensor 2 Replacement in Engine Controls - 3.8L.

1. Install the HO2S. Refer to Heated Oxygen Sensor 2 Replacement in Engine Controls - 3.8L.

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 a new gasket to the exhaust pipe studs.
3. Install and support the catalytic converter.

Notice: Refer to Fastener Notice in the Preface section.

4. Install the catalytic converter nuts.

Tighten
Tighten the nuts to 60 N·m (44 lb ft).




5. Install a new catalytic converter pipe gasket (1).
6. Install the catalytic converter pipe stud nuts (2).

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




7. Install the catalytic converter hangers.
8. Remove the support from the exhaust system.
9. Connect the HO2S electrical connector.
10. Inspect the exhaust system for leaks and underbody contact.
11. Lower the vehicle.

Catalytic Converter Replacement LY7

Important: The catalytic converter is serviced by replacing the entire assembly. Always replace the gaskets at the front and rear flanges when servicing the catalytic converter. Never install the original gasket.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
3. Remove the exhaust manifold pipe stud nuts (2).
4. Remove the exhaust manifold pipe gasket (1).
5. Support the exhaust system.



6. Remove the catalytic converter nuts.



7. Remove the catalytic converter hangers.
8. Remove the catalytic converter.
9. Remove the catalytic converter gasket.
10. Clean and inspect the exhaust manifold and the exhaust pipe gasket mating surfaces.
11. Remove the HO2S. Refer to Heated Oxygen Sensor 2 Replacement in Engine Controls - 3.6L.

1. Install the HO2S. Refer to Heated Oxygen Sensor 2 Replacement in Engine Controls - 3.6L.

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 a new gasket to the exhaust pipe studs.
3. Install and support the catalytic converter.

Notice: Refer to Fastener Notice in the Preface section.

4. Install the catalytic converter nuts.

Tighten
Tighten the nuts to 60 N·m (44 lb ft).




5. Install a new exhaust manifold pipe gasket (1).
6. Install the exhaust manifold pipe stud nuts (2).

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




7. Install the catalytic converter hangers.
8. Remove the support from the exhaust system.
9. Inspect the exhaust system for leaks and underbody contact.
10. Lower the vehicle.