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Crankshaft & Main Bearings

  1. Check crankshaft connecting rod journals for wear, out-of-round, taper and undersize. Machine or replace crankshaft and/or bearings as necessary. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS  table under ENGINE SPECIFICATIONS.
  2. Before removing main cap, measure and record crankshaft end play by prying crankshaft forward then rearward. Using Plastigage method, measure and record main bearing oil clearance. Remove crankshaft. Measure and record each main journal diameter in 2 places.
  3. Main bearing caps are marked and must be installed in original position. Tighten bearing caps evenly to specification. See TORQUE SPECIFICATIONS .
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