Catalytic Converter - LH

Catalytic Converter - LH, 3.5L GTDI

Removal

NOTE: Always install new fasteners and gaskets. Clean flange faces prior to new gasket installation to make sure of correct sealing.

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Jacking and Lifting Service and Repair.

2. Remove the LH Heated Oxygen Sensor (HO2S). For additional information, refer to Electronic Engine Controls Heated Oxygen Sensor (HO2S).

3. Remove the LH exhaust flexible pipe. For additional information, refer to Exhaust Flexible Pipe - LH LH - Exhaust Flexible Pipe.

4. Disconnect the LH Catalyst Monitor Sensor (CMS) electrical connector.

5. Remove the 3 LH catalytic converter-to-turbocharger nuts and the catalytic converter.
- Discard the nuts and gasket.

Installation

1. Inspect the LH turbocharger-to-catalytic converter studs for damage.
- If damaged or if a stud comes out when removing the nut, replace the stud.

- Tighten to 25 Nm (18 lb-ft).

2. NOTICE: Failure to tighten the LH catalytic converter manifold-to-turbocharger nuts to specification a second time will cause the LH catalytic converter manifold-to-turbocharger to develop an exhaust leak.

Using a new gasket and 3 new nuts, install the LH catalytic converter manifold to the turbocharger. Tighten the LH catalytic converter manifold in 2 stages.

- Stage 1: Tighten to 40 Nm (30 lb-ft).

- Stage 2: Tighten to 40 Nm (30 lb-ft).

3. Connect the LH Catalyst Monitor Sensor (CMS) electrical connector.

4. Install the LH exhaust flexible pipe. For additional information, refer to Exhaust Flexible Pipe - LH LH - Exhaust Flexible Pipe.

5. Install the LH Heated Oxygen Sensor (HO2S). For additional information, refer to Electronic Engine Controls Heated Oxygen Sensor (HO2S).