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2. Measure outer diameter of piston pin “Dp”. Standard diameter “Dp”: 21.989 - 22.001 mm (0.8657 - 0.8662 in) 3. Calculate piston pin clearance. dp − Dp = 0.002 - 0.006 mm (0.0001 - 0.0002 in) If it exceeds the above value, replace piston assembly with pin. PISTON RING SIDE CLEARANCE Side clearance: Top ring 0.045 - 0.080 mm (0.0018 - 0.0031 in) 2nd ring 0.030 - 0.070 mm (0.0012 - 0.0028 in) Oil ring 0.065 - 0.135 mm (0.0026 - 0.0053 in) Max. limit of side clearance: 0.2 mm (0.008 in) If out of specification, replace piston and/or piston ring assembly. PISTON RING END GAP End gap: Top ring 0.20 - 0.30 mm (0.0079 - 0.0118 in) 2nd ring 0.35 - 0.50 mm (0.0138 - 0.0197 in) Oil ring 0.20 - 0.60 mm (0.0079 - 0.0236 in) Max. limit of ring gap: 1.0 mm (0.039 in) If out of specification, replace piston ring. If gap still exceeds the I When replacing the piston, inspect cylinder block surface for CONNECTING ROD BEND AND TORSION Bend: Limit 0.15 mm (0.0059 in) Torsion: Limit 0.30 mm (0.0118 in) If it exceeds the limit, replace connecting rod assembly. AEM024 Micrometer SEM024AA NG OK Feeler Feeler gauge Ring SEM822B SEM038F Bend Feeler gauge SEM003F Torsion Feeler gauge CYLINDER BLOCK SR20DE Inspection (Cont’d) EM-111 |