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Crankshaft & Main Bearings

  1. Mark bearing caps for reassembly. Measure journal diameter, out-of-round, taper and oil clearance. If measurement is not within specification, replace main bearings and/or machine crankshaft. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS  table under ENGINE SPECIFICATIONS.
  2. Align thrust bearing surfaces, and measure crankshaft end play. See THRUST BEARING below.
    NOTE: The distance between the rear main bearing thrust faces on some engines is .008" (.20 mm) wider than standard. This is identified by .008  stamped on the crankshaft's rear counterweight. If this stamping is found, be sure to replace the rear main bearings with .008"(.20 mm) wider bearings.
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