Lincoln Aviator 2020-2025 Service Manual / Powertrain / Engine / Engine System - General Information / General Procedures - Exhaust Manifold Cleaning and Inspection

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

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

General Procedures - Cylinder Head Distortion

Special Tool(s) / General Equipment Feeler Gauge Check NOTE: Refer to the appropriate Section 303-01 for the specification. NOTE: Make sure all cylinder head surfaces are clear of any gasket material, silicone sealant, oil and coolant...

General Procedures - Piston Diameter

Check Measure the piston diameter 90 degrees from the piston pin and piston diameter (DN) height down from the top of the piston at the point indicated...

Other information:

Lincoln Aviator 2020-2025 Owners Manual: Opening the Doors

Front Doors Press the door release button on the armrest to release the door. Push the door out to open the door. Rear Doors Press the unlock switch on the door and then press the door release button on the armrest to release the door. The first press unlocks the door and the second press unlatches the door...

Lincoln Aviator 2020-2025 Service Manual: Removal and Installation - Timing Chain

Special Tool(s) / General Equipment Flat-Bladed Screwdriver Vise Vise Jaw Protectors Removal RH and LH timing chains 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, can cause engine failure...

Seatbelt Height Adjustment

WARNING: Position the seatbelt height adjuster so that the seatbelt rests across the middle of your shoulder. Failure to adjust the seatbelt correctly could reduce its effectiveness and increase the risk of injury in a crash.

Adjust the height of the shoulder belt so the belt rests across the middle of your shoulder. Slide the adjuster up to raise the belt. Press the button and slide it down to lower the belt.