故障现象一辆奥迪A6轿车因行驶时加速无力,且气门异响来我公司修理。 检测排除接车后起动试验,发动机起动正常,起动后机油灯灭。靠近发动机,能听到发动机左侧气门室部位有异响声。拆下发动机罩及气门室盖,查看凸轮轴及气门的工作状况,发现左侧凸轮轴上没有机油润滑, Symptoms An Audi A6 sedan acceleration due to weakness, and the valve to my company to repair abnormal sound. After the test excludes the car to start the test, the engine starts normally, the engine oil lamp is off after starting. Close to the engine, you can hear the left part of the engine chamber abnormal sound. Remove the hood and valve chamber cover, check the working conditions of the camshaft and valve and found no oil lubrication on the left camshaft,