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SEM258C 3. Measure piston skirt diameter. Piston diameter “A”: Refer to SDS (EM-60). Measuring point “a” (Distance from the top): 54 mm (2.13 in) 4. Check that piston-to-bore clearance is within specification. Piston-to-bore clearance “B”: 0.010 - 0.030 mm (0.0004 - 0.0012 in) 5. Determine piston oversize according to amount of cylinder Oversize pistons are available for service. Refer to SDS (EM- Cylinder bore size is determined by adding piston-to-bore Rebored size calculation: D = A + B − C where, D: Bored diameter 7. Install main bearing caps, and tighten to the specified torque. 8. Cut cylinder bores. I When any cylinder needs boring, all other cylinders must I Do not cut too much out of cylinder bore at a time. Cut 9. Hone cylinders to obtain specified piston-to-bore clearance. 10. Measure finished cylinder bore for out-of-round and taper. I Measurement should be done after cylinder bore cools SEM316A CRANKSHAFT 1. Check crankshaft main and pin journals for score, wear or 2. With a micrometer, measure journals for taper and out-of- Out-of-round (X − Y): Less than 0.005 mm (0.0002 in) Taper (A − B): Less than 0.005 mm (0.0002 in) SEM434 3. Measure crankshaft runout. Runout limit (Total indicator reading): 0.1 mm (0.004 in) GI MA LC EC FE AT PD FA RA BR ST RS BT HA EL IDX CYLINDER BLOCK Inspection (Cont’d) EM-49 |