Lincoln Navigator: Engine System - General Information / Valve Guide Inner Diameter. General Procedures
Check
NOTE:
Refer to the appropriate Section 303-01 for the specification.
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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.
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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.
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:
Removal steps in this procedure may contain installation details.
Drain the cooling system.
Refer to: Engine Cooling System Draining, Vacuum Filling and Bleeding
(303-03 Engine Cooling - 3.5L EcoBoost (272kW/370PS), General
Procedures)...
Adjustment
NOTE:
If the flash video link does not load or is
incompatible with your browser, a .wmv version of the video can be
accessed at:
http://www.fordservicecontent.com/Ford_Content/videos/FusionHeadlampAdj2.wmv
Click on the link above to view video...