Catalytic Converter — LH Manifold, 3.5L Ti-VCT

Removal

NOTE: Exhaust fasteners are of a torque prevailing design. Use only new fasteners with the same part number as the original. Torque values must be used as specified during reassembly to make sure of correct retention of exhaust components.

NOTE: Always install new nuts, studs 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 Section 100-02 .

2. Disconnect the LH Heated Oxygen Sensor (HO2S) electrical connector.

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

4. Remove the 4 bolts and the LH catalytic converter manifold heat shield.

5. Remove and discard the top 3 LH catalytic converter manifold-to-cylinder head nuts.

6. Remove the exhaust Y-pipe. For additional information, refer to Exhaust Y-Pipe in this section.

7. If equipped, remove the skid plate and the 10 retainers.

8. Remove and discard the lower 3 LH catalytic converter manifold-to-cylinder head nuts.

9. Remove the 2 LH catalytic converter manifold support bracket-to-transmission bolts.
   • Remove the LH catalytic converter manifold and discard the gasket.

10. Remove and discard the 6 LH catalytic converter manifold-to-cylinder head studs.

Installation

1. Install 6 new LH catalytic converter manifold-to-cylinder head studs.
   • Tighten to 12 Nm (106 lb-in).

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

   Using a new gasket, install the LH catalytic converter manifold and 6 new nuts. Tighten in 2 stages in the sequence shown:
   • Stage 1: Tighten to 25 Nm (18 lb-ft).
   • Stage 2: Tighten to 25 Nm (18 lb-ft).

3. Install the 2 catalytic converter manifold support bracket-to-transmission bolts.
   • Tighten to 48 Nm (35 lb-ft).

4. If equipped, install the skid plate and the 10 retainers.
   • Tighten to 70 Nm (52 lb-ft).

5. Install the exhaust Y-pipe. For additional information, refer to Exhaust Y-Pipe in this section.

6. Install the catalytic converter manifold heat shield and the 4 bolts.
   • Tighten to 10 Nm (89 lb-in).

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

8. Connect the LH Heated Oxygen Sensor (HO2S) electrical connector.