Piston Pins

With piston and rod assembly removed from cylinder bore, remove snap rings from piston pin bore. Heat piston to approximately 140°F (60°C) and remove piston pin. Mark or identify piston pin to ensure that it is installed in original piston. Separate connecting rod from piston.
To check fit of pin in piston, heat piston to approximately 140°F (60°C) and install piston pin. Pin should push through piston with slight thumb pressure. If pin slides into piston too easily, piston and pin both must be replaced.
Check fit of piston pin in connecting rod. If clearance exceeds 0.0006" (0.015 mm) for 8R-C engines or 0.0008" (0.020 mm) for 18R-C engines, connecting rod bushing must be replaced. Using a suitable mandrel (09222-30010) and an arbor press, press old bushing out of connecting rod. Install new bushing and hone to correct clearance for piston pin.
To assemble piston and rod assembly, heat piston to approximately 140°F (60°C) and place piston in rod so that notch in top of piston and side of rod with Japanese character are facing in same direction. Lubricate piston pin and slide in pin bore in piston and connecting rod. Install snap rings making sure they are fully seated in groove.

Fig 1: Piston & Rod Assembly
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CRANKSHAFT MAIN & CONNECTING ROD BEARINGS