气门密封性能变差或更换新的气门、气门座、气门导管,都要进行气门研磨。当前,大多数维修者是采用“拍打法”,即气门拍(又称气门吸碗)吸住气门,不断往复地提起和拍下,并稍作转动(每次1/4～1/3圈),使气门、气门座间的密封环带在有气门磨砂参与的情况下,互相拍打而实现研磨。 Valve sealing performance deterioration or replacement of the new valve, valve seat, valve guide, should be valve grinding. At present, most of the repairers use the “slap method”, that is, the valve flap (also called valve suction cup) sucks the valve, constantly lifts and shoots, and makes a slight turn (1/4 ~ 1/3 Circle), so that the valve, the valve seat between the sealing ring with valve scrub in the case of participation, each other and beat to achieve grinding.