Lincoln Navigator: Engine - 3.5L EcoBoost (272kW/370PS) / Exhaust Manifold RH. 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. NOTICE: The exhaust manifold heat shield provides critical protection for dual generator-equipped engines. If removed, it must be properly reinstalled.

   Engines equipped with dual generators.
   Remove the bolts and the exhaust manifold heat shield.
   

1. Remove the EGR cooler exhaust tube from the exhaust.
   

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

1. Remove and discard the EGR to exhaust manifold connector.
   

1. Remove the nuts and the RH exhaust manifold. Discard the nuts.
   

1. Remove the nuts, the RH exhaust manifold gasket and discard.
   

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. NOTE: Install short end of stud into cylinder head assembly.

   • Loosely install the new studs into the RH cylinder head.
     
   • Tighten the studs.
     Torque: 115 lb.in (13 Nm)
   • Install the new exhaust manifold gasket.
     

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

1. NOTE: The new EGR to exhaust manifold connector comes lubricated, no lubricant needs to be applied.

   Install the new EGR to exhaust manifold connector.
   Torque: 125 lb.ft (170 Nm)

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

1. Engine equipped with dual generator.
   Install the exhaust manifold heat shield and bolts.
   Torque: 18 lb.ft (25 Nm)