TBz,非常感激,机油滤清器底部的冲压铁板还发动机上的螺柱上,

because space is limited,管钳 too big.I tried 尖嘴钳插进铁板周围的圆孔中，逆时针拧, It doesn't work.I consulted with repair agent, he said it needs to dismantle 发动机的螺柱部件.