Ford Fusion: Engine System - General Information / Bearing Inspection. General Procedures
Inspection
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Cratering - fatigue failure
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Spot glazing - incorrect seating
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Scratching - dirty engine oil
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Base exposed - poor lubrication
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Both edges worn - journal damaged
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One edge worn - journal tapered or bearing not seated
Inspection and Verification - Engine Performance
NOTE:
There are 2 diagnostic paths that can be followed depending
on the type of engine concern. Carry out Inspection and Verification -
Engine Performance or Inspection and Verification - NVH...
Check
NOTE:
Refer to the appropriate Section 303-01 for the specification.
NOTE:
The crankshaft connecting rod journals must be
within specifications to check the connecting rod bearing journal
clearance...
Other information:
Check
NOTE:
Refer to the appropriate Section 303-01 for the specification.
NOTE:
Crankshaft main bearing journals must be within specifications before checking journal clearance.
Remove the crankshaft main bearing cap and crankshaft main bearing...
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. The center
electrode ceramic insulator surface is often a matte or dull finish and
pure white in color...