Maintenance specification table (unit : mm) - 178 - APPENDIX Group Part Inspection Item Stand value for assembly Limit for use Correction Remark Engine body Cylinder block & liner Inside diameter of Cylinder liner for wear N123 ~ N123.023 N123.223 Replace liner Measure unworn portion beneath the rim of the upper side Projected portion of liner 0.03 ~ 0.08 The upper surface of Cylinder block of distortion 0.05 - Correct with a surface grinder Per distortion length for 200 mm Hydraulic test for 1 minute (kg/cm2) 4 Cylinder head & valve Valve seat depression Intake 0 ~ 0.3 0.55 In case of new valve and seat Exhaust 0 ~ 0.3 0.55 Height 114.95 ~ 115 113.9 Replace cyl.
head Hydraulic test for 1 minute (kg/cm2) 4 - Replace if leaky Water temp. 70˚C Major moving parts Piston Piston diameter (18 mm from the lower side) N122.873 ~ N122.887 - Clearance between piston and liner 0.113~0.152 - - Width of piston ring grooves Top ring 3.5 - Replace piston if groove width is beyond specified value 2nd ring 3.060 ~ 3.080 - Oil ring 4.040 ~ 4.060 - Piston projection from cylinder block upper surface 0 ~ 0.12 - Measure unworn portion beneath the rim of the upper side Permissible weight difference of each piston ±15 g 96 g Piston ring Piston ring gap Top ring 0.30 ~ 0.45 1.5 Standard gauge inside diameter :
N123 *mark DE12TIS 2nd ring 0.35 ~ 0.50 1.5 Oil ring 0.30 ~ 0.50 *0.30 ~ 0.70 1.5 Piston ring side clearance Top ring - - Replace ring or piston Limit for use if for standard clearance 2nd ring 0.07 ~ 0.102 0.15 Oil ring 0.05 ~ 0.085 0.15 Direction of ring gap - - Install ring by 120˚C