缸頭和活塞積碳比較厲害,感覺還是過多機油進入燃燒室。既然缸蓋打開,應該順便把valve seal 換掉。
缸頭和活塞積碳比較厲害,感覺還是過多機油進入燃燒室。既然缸蓋打開,應該順便把valve seal 換掉。
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