Lincoln Navigator: Engine System - General Information / Valve Guide Inner Diameter. General Procedures
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.
-
Measure the ball gauge with a micrometer.
-
If the valve guide is not within specifications, install a new cylinder head assembly.
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...
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:
Removal
NOTE:
It is not necessary to remove the transmission fluid
filter to remove the transmission fluid auxiliary pump.
Remove the transmission fluid pan and gasket.
Refer to: Transmission Fluid Pan, Gasket and Filter (307-01 Automatic
Transmission - 10-Speed Automatic Transmission – 10R80, Removal and
Installation)...
Diagnostic Trouble Code (DTC) Chart
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
REFER to: Passive Anti-Theft System (PATS) - System Operation and
Component Description (419-01B Passive Anti-Theft System (PATS),
Description and Operation)...