Lincoln Aviator 2020-2025 Service Manual / Powertrain / Engine / Engine System - General Information / General Procedures - Valve Guide Inner Diameter
Lincoln Aviator: Engine System - General Information / General Procedures - Valve Guide Inner Diameter
Check
NOTE: Refer to the appropriate Section 303-01 for the specification.
-
NOTE: Valve guides tend to wear in an hourglass pattern. The ball gauge can be inserted into the combustion chamber side of the valve guide, if necessary.
-
Use a ball gauge to determine the inside diameter of
the valve guides in 2 directions at the top, middle and bottom of the
valve guide.
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Measure the ball gauge with a micrometer.
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If the valve guide is not within specifications, install a new cylinder head assembly.
-
Use a ball gauge to determine the inside diameter of
the valve guides in 2 directions at the top, middle and bottom of the
valve guide.
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General Procedures - Spark Plug Inspection
Inspection
NOTE:
Dropped spark plugs should always be discarded.
Unfired
An unfired spark plug should appear very clean
with a pure nickel finish to the threads and ground strap...
General Procedures - Valve Stem Diameter
Check
NOTE:
Refer to the appropriate Section 303-01 for the specification.
Measure the diameter of each intake and exhaust valve
stem at the points shown...
Other information:
Lincoln Aviator 2020-2025 Owners Manual: Operating All-Wheel Drive (AWD) Vehicles With Spare Tires
Do not use a different size spare tire other than the tire provided. If the mini-spare tire is installed, the AWD system will disable and enter rear-wheel drive only mode to protect driveline components. Some limited AWD traction could be provided if the mini-spare is installed on one of the front wheels...
Lincoln Aviator 2020-2025 Owners Manual: Stopping the Engine When Your Vehicle is Moving
WARNING: Switching off the engine when your vehicle is still moving results in a significant decrease in braking assistance. Higher effort is required to apply the brakes and to stop your vehicle. A significant decrease in steering assistance could also occur...
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Fastening the Seatbelts
The front outboard and rear safety restraints in the vehicle are combination lap and shoulder belts.
Insert the belt tongue into the proper buckle (the buckle closest to the direction the tongue is coming from) until you hear a snap and feel it latch. Make sure that you securely fasten the tongue in the buckle.
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