Exhaust Manifold - LH

Exhaust Manifold - LH

















Removal

All engines
1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Maintenance/Service and Repair.
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 2 RH and 2 LH exhaust Y-pipe 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. CAUTION: 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 (9 lb-ft).





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 (15 lb-ft).

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 RH and 2 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.