1.湿式缸套座孔变形1台康明斯C240系列发动机经大修后,有几个缸的排气口窜机油严重,曲轴箱窜气也比较严重。开始以为故障原因是气门油封漏油或曲轴箱通风不畅,经过检查以上2个部位正常,怀疑很有可能是活塞环窜气。装配发动机前,修理人员仔细检查测量过缸套活塞组件(湿式缸套)的状况,缸套的圆度、圆柱度以及缸套与活 1. Wet Cylinder Block Hole Deformation 1 Cummins C240 ​​series engine overhaul, there are several cylinder exhaust channeling serious oil, crankcase blow-by gas is also more serious. Initially that the fault is the cause of the valve oil seal leakage or crankcase poor ventilation, after checking the above two parts normal, it is suspected that piston ring blow-by gas. Before assembling the engine, the repairer carefully examined the condition of the measured cylinder liner piston assembly (wet liner), the liner’s circularity, cylindricity, and the liner and live