Lincoln Navigator: Engine System - General Information / Exhaust Manifold Cleaning and Inspection. General Procedures

Lincoln Navigator 2018-2025 Workshop Manual / Engine / Engine System - General Information / Exhaust Manifold Cleaning and Inspection. General Procedures

Special Tool(s) / General Equipment

Feeler Gauge

Cleaning

Clean the exhaust manifold using a suitable solvent. Use a plastic scraping tool to clean the gasket sealing surfaces.

Inspection

NOTE: New exhaust manifold gaskets, studs, nuts and/or bolts must be installed when an exhaust manifold is serviced.

NOTE: Use a Straightedge that is calibrated by the manufacturer to be flat within 0.005 mm (0.0002 in) per running foot of length, such as Snap-On® GA438A or equivalent. For example, if the Straightedge is 61 cm (24 in) long, the machined edge must be flat within 0.010 mm (0.0004 in) from end to end.
Using the Straightedge and a Feeler Gauge Set, check the exhaust manifold sealing surface for warpage. If the warpage is greater than 0.76 mm (0.0299 in), install a new exhaust manifold.
Use the General Equipment: Feeler Gauge

Engine Noise Identification and Location. General Procedures

NOTE: This procedure uses multiple tools/methods to help locate the source of engine noise. It may be necessary to repeatedly compare the sound between the tools/methods to help locate the source of the noise...

Intake Manifold Vacuum Test. General Procedures

Bring the engine to normal operating temperature. Connect the Vacuum/Pressure Tester to the intake manifold. Run the engine at the specified idle speed...

Other information:

Lincoln Navigator 2018-2025 Workshop Manual: Second Row Seat Cushion Adjuster - Vehicles With: Multi-Contour Seats. Removal and Installation

Special Tool(s) / General Equipment Interior Trim Remover Removal NOTE: Right hand (RH) shown, left hand (LH) similar. Remove the second row single seat cover. Refer to: Second Row Single Seat Cushion Cover - Vehicles With: Multi-Contour Seats (501-10B Second Row Seats, Removal and Installation)...

Lincoln Navigator 2018-2025 Workshop Manual: Glove Compartment. Removal and Installation

Special Tool(s) / General Equipment Interior Trim Remover Removal NOTE: Removal steps in this procedure may contain installation details. NOTE: Floor console shown removed for clarity. Release the clips and remove the trim panel...

Rear Camber Adjustment. General Procedures

Special Tool(s) / General Equipment

Wheel Alignment System

Activation

NOTICE: Suspension fasteners are critical parts that affect the performance of vital components and systems. Failure of these fasteners may result in major service expense. Use the same or equivalent parts if replacement is necessary. Do not use a replacement part of lesser quality or substitute design. Tighten fasteners as specified.

Using alignment equipment and the manufacturer's instructions, measure the rear camber.
Use the General Equipment: Wheel Alignment System