【问】汽车排气管滴水是怎么回事？

微路况 · 公众号 · 汽车 · 2016-09-15 10:55

正文

不难发现，不少汽车的尾部排气管有时候会出现滴水的情况，这到底是怎么回事呢？是车子出现毛病了么？

很多车主在启动车之前，经常会发现在汽车排气管下一地水迹，都以为自己的爱车出了什么毛病，其实不然。首先这是一个很正常的现象，不要慌，汽油在经过安全的燃烧后生成了二氧化碳和水蒸汽，水蒸汽冷凝后形成液态水，达到一定量就通过排气管排了出来。

这跟车出厂设计有关排气管一般都有一个小孔，就是用来排水的，有的排气管尾部设计的最后面比较低，这样在行车过程中就会把水排出来，这就是为什么你开车能看到前车的排气管向外滴答水，有的排气管中部比较低，厂家会中部的位置最低的地方打一个孔，让水排出来。

当然也有一种情况，这时候排气管出水是不正常现象，发动机中的冷却水露到燃烧室，导致排气管漏水，这个时候只要看下发动机舱冷却水箱中水有没有漏就好了。

另外，如果发现后排气管排黑烟，则表明汽车发动机汽油燃烧过度，要不是气缸气压过低或个别缸不工作，赶紧到4S店修理即可。

其实车子的排水管滴水说明了车子的引擎状况不错，汽车得到了充分燃烧，供油系统状况好，也代表了气缸没有磨损现象，你也不用担心了。

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