3.2. 9. Piston rings 1) Visual check Replace the piston rings with new ones if detected worn or broken when the engine is over- hauled. 2) Piston ring gap Insert the piston ring into the upper portion of the cylinder liner bore so that it is held at a right angle to the cylinder liner wall. Measure the piston ring gap with a feeler gauge. Replace piston rings with new ones if the gap is beyond the limit 3) Piston ring side clearance Fit the compression ring and oil ring in the piston ring groove. With a feeler gauge, measure side 간극 게이지 feeler gauge clearance of each ring, and replace either the ring or piston if the mea- sured value is beyond the specified limit.
EA0M4032 4) Piston ring tension With a tension tester, measure piston ring tension. Replace the piston ring if the measured value is beyond the limit. - 73 - INSPECTION AND MEASUREMENT Standard Limit Top ring 0.30 ~ 0.45 mm 1.5 mm 2nd ring 0.35 ~ 0.50 mm 1.5 mm Oil ring DE12T/TI/TIA 0.30 ~ 0.50 mm 1.5 mm DE12TIS 0.40 ~ 0.70 mm Standard Limit Top ring - 2nd ring 0.07 ~ 0.102 mm 0.15 mm 2nd ring 0.05 ~ 0.085 mm 0.15 mm Standard Top ring 2.27 ~ 3.41 kg 2nd ring 2.0 ~ 3.0 kg Oil ring 4.03 ~ 5.57 kg