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Crankshaft & Main Bearings

  1. Before removing main caps, measure and record crankshaft end play. Using Plastigage, measure and record main bearing oil clearance. DO NOT rotate crankshaft when measuring oil clearances.
  2. Remove crankshaft. Measure and record each main journal diameter in 2 places. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS  table under ENGINE SPECIFICATIONS. Machine or replace crankshaft as necessary. Main bearing upper halves are grooved.
  3. Install main bearing caps in original positions. Tighten bearing cap bolts in sequence and to specification. See Fig 1. See TORQUE SPECIFICATIONS .
Fig 1: Main Bearing Cap Bolt Tightening Sequence
G00014117Courtesy of KIA MOTORS AMERICA, INC.
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