F 250 4WD Super Duty V8-6.4L DSL Turbo (2008)
Crankshaft Main Bearing: Testing and Inspection
Crankshaft Main Bearing Journal Diameter
Crankshaft Main Bearing Journal Diameter
1. Clean the crankshaft with a suitable solvent. Dry with compressed air.
2. Use a stiff nylon brush to clean all internal oil passages of the crankshaft. Loosen all accumulated dirt, sludge and deposits. Flush oil passages with
a suitable solvent.
3. Inspect crankshaft journals for scratches, grooves and scoring.
4. Inspect crankshaft main bearings for scratches, grooves, scoring, pitting and inconsistent coloring.
5. Use a 75-100 mm (3-4 inch) micrometer to measure the diameter of each journal. Measure each journal at 2 points, 90 degrees apart. Move the
micrometer over the entire width of the journal.
