Exhaust Manifold - LH

Exhaust Manifold - LH





4.6L (2V) Engine










5.4L (2V) Engine









Removal

All engines

1. With the vehicle in NEUTRAL, position it on a hoist.

2. Remove the engine cover.

4.6L (2V) engine

3. Disconnect the upper and lower fitting and remove the EGR system module-to-exhaust manifold tube.





All engines

4. Remove the 4 exhaust Y-pipe flange nuts (2 RH and 2 LH).
- Discard the 4 flange nuts.





5. Remove the 8 nuts and the exhaust manifold.
- Discard the 8 exhaust manifold nuts.

6. Remove and discard the exhaust manifold gasket.
- Clean the sealing surfaces with metal surface prep. Follow the directions on the packaging.

7. Remove and discard the 8 exhaust manifold-to-cylinder head studs.

8. Clean and inspect the exhaust manifold.

Installation

All engines

1. 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 sealing surfaces with metal surface prep.

2. Install 8 new exhaust manifold-to-cylinder head studs.
- Tighten to 12 Nm (106 lb-in).

4.6L (2V) engine

3. Using new exhaust manifold gaskets, position the LH exhaust manifold and install the 8 new nuts in the sequence shown.
- Tighten to 20 Nm (177 lb-in).





5.4L (2V) engine

4. Using new exhaust manifold gaskets, position the LH exhaust manifold and install the 8 new nuts in the sequence shown.
- Tighten to 25 Nm (18 lb-ft).





5. Position the Y-pipe flange and install the 2 new RH and 2 new LH nuts.
- Tighten to 40 Nm (30 lb-ft).

4.6L (2V) engine

6. Install the EGR system module-to-exhaust manifold tube and tighten the upper and lower fittings in 2 stages.
- Stage 1: Connect the upper and lower fittings and hand-tighten.

- Stage 2: Tighten to 42 Nm (31 lb-ft).





All engines

7. Install the engine cover.