Lincoln Navigator: Engine - 3.5L EcoBoost (272kW/370PS) / Crankshaft Rear Seal. Removal and Installation

Materials

Removal

NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces that enters the oil passages, coolant passages or the oil pan, may cause engine failure.

1. Remove the flexplate.
   Refer to: Flexplate (303-01 Engine - 3.5L EcoBoost (272kW/370PS), Removal and Installation).
   

1. Remove the crankshaft sensor ring and the engine-to-transmission spacer plate.
   

1. Disconnect the CKP sensor electrical connector.
   

1. Remove the bolt and the CKP sensor.
   

1. Remove the oil pan-to-crankshaft rear seal bolts.
   

1. Remove the bolts and the crankshaft rear seal retainer. Discard the crankshaft rear seal retainer.
   

1. Clean and prepare the RTV sealing surface.
   Refer to: RTV Sealing Surface Cleaning and Preparation (303-00 Engine System - General Information, General Procedures).
   

Installation

1. NOTICE: Failure to use Motorcraft® High Performance Engine RTV Silicone may cause the engine oil to foam excessively and result in serious engine damage.

   NOTE: The crankshaft rear seal retainer must be installed and the bolts tightened within 10 minutes of sealant application.

   Apply 5 mm (0.196 in) bead of silicone sealant.
   Material: Motorcraft® High Performance Engine RTV Silicone / TA-357 (WSE-M4G323-A6)

1. NOTICE: Failure to use Motorcraft® High Performance Engine RTV Silicone may cause the engine oil to foam excessively and result in serious engine damage.

   NOTE: The crankshaft rear seal retainer must be installed and the bolts tightened within 10 minutes of sealant application.

   Apply 3 mm (0.11 in) bead of silicone sealant.
   Material: Motorcraft® High Performance Engine RTV Silicone / TA-357 (WSE-M4G323-A6)

1. Lubricate the crankshaft rear seal with clean engine oil.
   Material: Engine Oil - SAE 5W-30 - Synthetic Blend Motor Oil / XO-5W30-Q1SP (WSS-M2C946-B1)

1. 1. Install the crankshaft rear seal retainer at an angle above the oil pan flange to avoid scraping off the sealer.
      
   2. Tilt the seal retainer up and onto the rear of the cylinder block.
      

1. Install the bolts and tighten in sequence shown.
   Torque: 89 lb.in (10 Nm)

1. Install the oil pan-to-crankshaft rear seal bolts.
   Torque: 89 lb.in (10 Nm)

1. Install the CKP sensor and the bolt.
   Torque: 62 lb.in (7 Nm)

1. Connect the CKP sensor electrical connector.
   

1. Install the engine-to-transmission spacer plate and the crankshaft sensor ring.
   

1. Install the flexplate.
   Refer to: Flexplate (303-01 Engine - 3.5L EcoBoost (272kW/370PS), Removal and Installation).