E 150 V8-4.6L (2007)
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 ft. lbs).
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 ft. lbs).
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 ft. lbs).
5. Position the Y-pipe flange and install the 2 RH and 2 LH nuts.
^
Tighten to 40 Nm (30 ft. lbs).