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2026-06-18 · 3 min read

Exhaust Leak Symptoms — More Than Just a Loud Engine

An exhaust leak isn't just a noise issue. It can let carbon monoxide seep into the cabin — a serious health risk. Here's how to spot an exhaust leak early.

Exhaust Leak Symptoms — More Than Just a Loud Engine

排气系统从引擎连接到车尾,包含排气歧管、催化器、消声器和排气管尾段。任何接头、焊点或管身裂缝都可能漏气,影响从噪音到健康的各方面。

漏气的症状

引擎声变大:排气管漏气绕过了消声器,引擎轰鸣声比以前响得多。

「噗噗」或「嘶嘶」声:尤其冷车启动时或急加速时更明显。

废气味渗入车内:在低速、停车或关窗行驶时能闻到类似硫磺或烧焦的气味。

油耗增加:漏气点在 O2 传感器前方,传感器读数异常,ECU 误调混合比。

Check Engine 灯亮:伴随 O2 传感器相关故障码。

漏在哪里的分别

排气歧管(引擎旁边):声音最响,废气在引擎舱内散发,风险最高。

催化器后段:声音较小,废气可能从车底渗入车内。

消声器或尾管:噪音明显,但废气直接从车底排出,风险相对低。

一氧化碳的危险

排气管漏气最严重的危险是一氧化碳(CO)进入车内。CO 无色无味,高浓度会导致头晕、恶心甚至晕厥。

低速或塞车时尤其危险——废气在车底积聚,关紧车窗时容易渗入。

发现废气味进车内,立刻开窗,不要继续驾驶。

结论

听到引擎声变大,或车内有废气味,要尽快检查排气系统。不要因为「只是声音大」而拖着不修。4M CARCARE 可检查整段排气系统,找出漏气位置并修复。

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