裏麵的油都成油泥了,早就沒了潤滑功能了,valve stem 已經磨損漏油了所以才會冒藍煙燒機油。
裏麵的油都成油泥了,早就沒了潤滑功能了,valve stem 已經磨損漏油了所以才會冒藍煙燒機油。
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