在GB/T18344—2001 《汽车维护、检测、诊断技术规范》规定的汽车二级维护作业内容要调整气门间隙,其目的是使配气机构中的气门间隙符合技术标准,以确保恢复发动机的动力性能。在实际调整气门间隙的操作中通常是用塞规来测量气门间隙,但当遇到气门摇臂磨损出凹槽时,塞规往往无法准确测出磨凹的部分,以致气门间隙失准,气门产生异响。在实际工作中,还有一些老师傅采用手拎气门 In the GB / T18344-2001 “vehicle maintenance, testing, diagnostic specifications,” the contents of the second-level maintenance of the vehicle to adjust the valve clearance, the purpose is to make the valve body in the valve clearance in line with technical standards to ensure the restoration of engine power performance. In the actual adjustment of the valve clearance is usually used to measure the valve gauge gauge, but when the valve rocker wear out of the groove, the plug gauge often can not accurately measure the concave part, resulting in misalignment of the valve, the valve Abnormal sound. In actual work, there are some old masters adopted the hand to carry the valve