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Piston & Rod Assembly

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  1. Each rod is sorted into one of 4 tolerance ranges. Size depends on crank journal bore. A number between 1 and 4 is stamped on split line of rod big end. Any combination of numbers between 1 and 4 may be found on any engine. See CONNECTING RODS  under ENGINE SPECIFICATIONS.
    NOTE: Reference numbers are for big end bore code, and DO NOT  indicate rod position in engine.
  2. Connecting rod big end bore size is 1.89" (48.0 mm). Install piston and connecting rod so arrow on top of piston is toward timing belt, and connecting rod oil hole is toward intake manifold side of engine. See Fig 1.
Fig 1: Positioning Piston Onto Connecting Rod
G96F07971Courtesy of AMERICAN HONDA MOTOR CO., INC.