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2026-09-19 · 4 min read

Car Leaking Oil? Different Locations Mean Different Problems

Oil stains under your car or grease in the engine bay? The colour and location of a leak tells you exactly what's wrong.

Car Leaking Oil? Different Locations Mean Different Problems

发现车子底下有油渍,或引擎舱有油污,别等「看看再说」。漏油的颜色和位置能帮你缩小问题范围,有些情况需要尽快处理,有些可以预约时再修。

黑色或深褐色油——机油漏

最常见的漏油。来源通常是气门室盖垫(rocker cover gasket)、油底壳垫片、曲轴油封、机油滤芯座。欧洲车上了年份特别容易。少量渗漏短期影响不大,但要监控机油液位,避免机油过低损伤引擎。

红色或粉红色油——变速箱油漏

ATF 或 CVT 油通常是红色。来源是变速箱密封圈、冷却管接头、变速箱油底壳垫片。变速箱缺油会导致换挡顿挫、过热,严重的会变速箱报废,不能拖。

透明或淡黄色液体——刹车液 / 动力方向盘油

刹车液漏了最危险,通常出现在车轮附近(刹车卡钳或煮令),会导致刹车失效。动力方向盘油漏通常在引擎舱前方,方向盘会变重或有异响。

绿色 / 橙色 / 蓝色液体——冷却液漏

冷却液(coolant)颜色视品牌而定,常见绿色或橙色。漏冷却液会导致引擎过热。如果看到水渍但闻到甜味,很可能是冷却液,不是普通水。

要怎么处理

看到漏油先检查相应液位。机油、冷却液、刹车液任何一样液位严重偏低,不要继续开,叫拖车或来店。小量渗漏可预约检查,但不要一直「等等再说」,渗漏通常只会越来越严重。

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