Catalytic Converter - LH Manifold

Catalytic Converter - LH Manifold, 3.5L

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.

2. Remove the LH Heated Oxygen Sensor (HO2S) sensor.

3. Remove the 3 heat shield bolts and the heat shield.

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

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 .

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

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


9. 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. NOTE: Do not tighten the 3 new lower LH catalytic converter manifold-to-cylinder head nuts at this time.

Install a new gasket, the LH catalytic converter manifold and loosely install 3 new lower LH catalytic converter manifold-to-cylinder head nuts.

- Do not tighten the 3 lower LH catalytic converter manifold-to-cylinder head nuts at this time.


3. Install the 3 new upper LH catalytic converter manifold-to-cylinder head nuts.
- Tighten to 25 Nm (18 lb-ft).


4. Tighten the 3 lower LH catalytic converter manifold-to-cylinder head nuts
- Tighten to 25 Nm (18 lb-ft).


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


6. Install the exhaust Y-pipe. For additional information, refer to Exhaust Y-Pipe .

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

8. Install the heat shield and the 3 heat shield bolts
- Tighten to 12 Nm (106 lb-in).


9. Install the LH Heated Oxygen Sensor (HO2S) sensor.