Lincoln Navigator: Engine - 3.5L EcoBoost (272kW/370PS) / Exhaust Manifold LH. Removal and Installation

Materials

Removal

1. With the vehicle in NEUTRAL, position it on a hoist.
   Refer to: Jacking and Lifting (100-02 Jacking and Lifting, Description and Operation).
   

1. Remove the LH turbocharger.
   Refer to: Turbocharger LH (303-04B Fuel Charging and Controls - Turbocharger - 3.5L EcoBoost (272kW/370PS), Removal and Installation).
   

1. • Remove and discard the nuts.
     
   • Remove the exhaust manifold.
     

1. Remove and discard the exhaust manifold gasket and studs.
   

1. • Clean and inspect the exhaust manifold.
     Refer to: Exhaust Manifold Cleaning and Inspection (303-00 Engine System - General Information, General Procedures).
     

   • 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 wipes. Follow the directions on the packaging.
     Material: Motorcraft® Metal Surface Prep Wipes / ZC-31-B

Installation

1. • Hand start the new exhaust manifold studs.
     Torque: 115 lb.in (13 Nm)
   • Tighten the new exhaust manifold studs.
     Torque: 115 lb.in (13 Nm)
   • Install a new gasket.
     

1. Install the exhaust manifold and new nuts in the sequence shown.
   Torque:
     Stage 1:  142 lb.in (16 Nm)
     Stage 2:  16 lb.ft (22 Nm)

1. Install the LH turbocharger.
   Refer to: Turbocharger LH (303-04B Fuel Charging and Controls - Turbocharger - 3.5L EcoBoost (272kW/370PS), Removal and Installation).