在车辆维修保养中，如发现因气门密封不严引起发动机气缸压力降低时，通常采取研磨气门的办法加以解决。但只研磨气门有时会引起发动机窜机油的故障现象，特别是气缸磨损圆度较大时，这一故障现象更为明显。所以在解决气门密封不严气缸内压力下降的问题时，要综合考虑，采取适 In the vehicle maintenance, found that due to lax valve seal caused by the engine cylinder pressure is reduced, usually taken to solve the grinding valve. However, only grinding the valve sometimes causes the engine oil channeling fault, especially when the cylinder wear roundness is larger, the phenomenon of this fault is more obvious. Therefore, to solve the valve seal lax pressure drop in the problem, we must take into account, to take appropriate