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Home >> Mazda >> 1981 >> B2000 Base >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> MAZDA Engines - 4-Cylinder >> Crankshaft Main & Connecting Rod Bearings >> Main & Connecting Rod Bearings >> Inspection

Main & Connecting Rod Bearings: Inspection

  1. Using a micrometer, measure diameter of connecting rod and main journals. If wear is more than 0.002" (0.051 mm) at any journal, crankshaft must be ground to fit 0.010" (0.25 mm) 0.020" (0.50 mm) or 0.030" (0.75 mm) undersize bearings.
  2. Using a dial indicator, check crankshaft for out-of-round. Maximum allowable out-of-round is 0.0012" (0.030 mm).
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