Exhaust Manifold - LH

Exhaust Manifold - LH













Removal

1. Remove the LH catalytic converter. For additional information, refer to Exhaust System Service and Repair.

2. Remove the LH Heated Oxygen Sensor (HO2S). For additional information, refer to Electronic Engine Controls - 3.5L Heated Oxygen Sensor (HO2S).

3. Remove the 3 bolts and the LH exhaust manifold heat shield.

4. Remove the 6 nuts and the LH exhaust manifold.
- Discard the nuts and gasket.

5. Clean and inspect the LH exhaust manifold. For additional information, refer to Engine System - General Information Exhaust Manifold Cleaning and Inspection.

6. Remove and discard the 6 LH exhaust manifold studs.





7. NOTICE: Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These may cause scratches and gouges resulting in leak paths. Use a plastic scraper to clean the sealing surfaces.

Clean the exhaust manifold mating surface of the cylinder head with metal surface prep. Follow the directions on the packaging.

Installation

1. Install 6 new LH exhaust manifold studs.
- Tighten to 12 Nm (106 lb-in).

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

Using a new gasket, install the LH exhaust manifold and 6 new nuts. Tighten in 2 stages in the sequence shown:

- Stage 1: Tighten to 20 Nm (177 lb-in).

- Stage 2: Tighten to 25 Nm (18 lb-ft).





3. Install the LH exhaust manifold heat shield and the 3 bolts.
- Tighten to 10 Nm (89 lb-in).

4. Install the LH HO2S. For additional information, refer to Electronic Engine Controls - 3.5L Heated Oxygen Sensor (HO2S).

5. Install the LH catalytic converter. For additional information, refer to Exhaust System Service and Repair.