V45 12. CRANKSHAFT/PISTON SERVICE INFORMATION 12-1 BEARING INSPECTION 12-8 TROUBLESHOOTING 12-2 BEARING SELECTION 12-10 CONNECTING ROD REMOVAL 12-3 CRANKSHAFT INSTALLATION 12-12 PISTON REMOVAL 12-4 PISTON AND ROD INSTALLATION 12-12 CRANKSHAFT REMOVAL 12-7 SERVICE INFORMATION GENERAL All bearing inserts are select fit and are identified by color code. Select replacement bearings from the code tables. After installing new bearings, recheck them with plastic gauge to verify clearance. Apply molybdenum disulf led grease to the main journals and crankpins during assembly. Before removing the piston and connecting rod assemblies, clean the top of the cylinder of any carbon deposits. For servicing the piston, connecting rod and crankshaft, the crankcase assembly must be separated (Section 11). SPECIFICATIONS ITEM STANDARD SERVICE LIMIT Crankshaft Connecting rod big end side clearance 0.10-0.30 mm (0.004-0.012 in) 0.40 mm (0.016 in) Runout 0.03 mm (0.001 in) — Crankpin oil clearance 0.028-0.052 mm (0.0011-0.0020 in) 0.08 mm (0.003 in) Main journal oil clearance 0.028-0.052 mm (0.0011-0.0020 in) 0.08 mm (0.003 in) Cylinder I.D. 70.000-70.015 mm (2.755-2.756 in) 70.10 mm (2.76 in) Warpage 0.10 mm (0.004 in) Piston Ring-to-groove Top 0.015-0.045 mm (0.0006-0.0018 in) 0.10 mm (0.004 in) clearance Second 0.015-0.045 mm (0.0006-0.0018 in) 0.10 mm (0.004 in) Ring end gap Top 0.10-0.30 mm (0.004-0.012 in) 0.50 mm (0.020 in) Second 0.10-0.30 mm (0.004-0.012 in) 0.50 mm (0.020 in) Oil (Side rail) 0.30-0.90 mm (0.012-0.035 in) 1.1 mm (0.04 in) Piston 0.0. 69.960-69.990 mm (2.754-2.755 in) 69.85 mm (2.750 in) Piston-to-cylinder clearance 0.01-0.055 mm (0.004-0.002 in) 0.10 mm (0.004 in) Piston pin bore 18.002-18.008 mm (0.7087-0.7090 in) 18.1 mm (0.71 in) Piston pin 0.0. 17.994-18.000 mm (0.7084-0.7086 in) 17.98 mm (0.70 in) Piston-to-piston pin clearance 0.002-0.014 mm (0.0001-0.0006 in) 0.04 mm (0.002 in) Connecting rod small end I.D. 18.016-18.034 mm (0.7093-0.7100 in) 18.08 mm (0.712 in) Piston pin-to-connecting rod clearance 0.016-0.040 mm (0.0006- 0.0016 in) 0.060 mm (0.0024 in) Cam chain Length at 13 kg (29 lb) tension 323.85-324.30 mm (12.750-12.767 in) 326.120 mm (12.84 in) TORQUE: Crankpin: 30-34 N•m (3.0-3.4 kg•m, 22-25 ft-lb) TOOL Special Piston Ring Compressor 07954-2830000 or Commercially available compressor (Automotive style) Date of Issue: October, 1982 167 © HONDA MOTOR CO., LTD. 1 2- 1