如何判断活塞环磨损超限１、排气管冒蓝烟。油底壳与空滤器油盘里机油油位在规定范围内，气门导管与气门杆配合间隙正常，发动机使用一段时间后，排气管冒蓝烟，说明活塞环开口间隙与边间隙已超限。２、压缩力显著下降。气门间隙正常，减压机构技术状态良好。缸套与活塞磨... How to determine the wear and tear of the piston ring overrun 1, the exhaust pipe to take the blue smoke. Oil sump and air filter oil pan oil level within the specified range, the valve guide and valve stem with the normal gap, the engine for some time, the exhaust pipe to take blue smoke, indicating the piston ring opening gap and the edge clearance has been exceeded . 2, compressive force decreased significantly. Valve clearance is normal, decompression mechanism technology is good. Cylinder liner and piston mill ...