缸头和活塞积碳比较厉害,感觉还是过多机油进入燃烧室。既然缸盖打开,应该顺便把valve seal 换掉。
缸头和活塞积碳比较厉害,感觉还是过多机油进入燃烧室。既然缸盖打开,应该顺便把valve seal 换掉。
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