一些柴油机气门间隙调好后,工作不长时间,就明显出现气门间隙自动改变。常见气门间隙变大的原因有:(1)摇臂轴与摇臂村套配合间隙过大。(2)摇臂轴座紧固螺钉及气门间隙调整螺钉松动或滑扣。(3)气门导管安装时未压到合适位置,造成推杆顶弯或摇臂开裂。气门间隙迅速变小的原因有:(1)研磨气门时残留的研磨砂未洗净,造 Some diesel valve clearance adjusted, the work is not a long time, it is clear that the valve clearance automatically changes. Common causes of larger valve clearance are: (1) rocker arm and rocker arm set with the gap too large. (2) rocker arm shaft mounting screws and valve clearance adjusting screws loose or slipping. (3) When the valve guide tube is not installed to the proper position, resulting in push rod bending or rocker cracking. Valve gap quickly become smaller because: (1) the abrasive grinding wheel remains unwashed, made