水没了就停了，不是油。
在4s的保修范围内吗？
开空调了吗
没开空调呀
这里的水是空气遇冷变成的吗？然后漏出来？长期那个漏水的地方岂不是会生锈？我去做service 店里会免费帮我查原因不？
差不多，废气到排气管遇冷的产物，只要不同时伴随冒白烟那就没问题，去保养的时候问问他们呗，估计要换也是你自己掏腰包
嗯 哪天我钻到车底好好看看，前几个月我就发现有水了，开始我以为是下雨漏下来的，结果这几天天好，还有水，看来等以后生锈烂穿了就得换一个了。
网络上查的，英语资料。
#### Water Condensation in Engines
This is the most common yet not to be worried about the reason behind water coming from your exhaust pipe. Water and carbon dioxide form a mixture as soon as you turn on your vehicle. After you park your car and the engine starts to cool down, the water vapour cools down to the water, dripping from the car’s exhaust pipe. This is quite normal and not a severe problem to be worried about.