Catalytic Converter Replacement - Left Side LY7

Caution: Refer to Exhaust Service Caution in the Preface section.

Caution: Refer to Protective Goggles and Glove Caution in the Preface section.

1. Remove the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Left Side .
2. Remove the catalytic converter to exhaust manifold nuts (1).
3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .



4. Disconnect the heated oxygen sensor (HO2S) electrical connector (2) from the engine wiring harness electrical connector.



5. Remove the left catalytic converter to exhaust flexible pipe nuts.



6. Remove the catalytic converter from the vehicle.
7. Remove and discard the catalytic converter to exhaust manifold gasket (2).
8. Remove and discard the catalytic converter to exhaust flexible pipe gasket (1).

1. Install a NEW catalytic converter to exhaust manifold gasket (2) onto the catalytic converter.
2. Install the catalytic converter to the vehicle.
3. Install a NEW catalytic converter to exhaust flexible pipe gasket (1) between the converter and the flexible pipe.

Notice: Refer to Fastener Notice in the Preface section.




4. Install the left catalytic converter to exhaust flexible pipe nuts.

Tighten
Tighten the bolts to 25 N·m (18 lb ft).




5. Connect the HO2S electrical connector (2) to the engine wiring harness electrical connector.
6. Lower the vehicle.



7. Install the catalytic converter to exhaust manifold nuts (1).

Tighten
Tighten the nuts to 50 N·m (37 lb ft).

8. Install the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Left Side .