Water Coming Out From Car Silencer- A Good Sign Or Bad Sign?

“Water dropping engine” is a common phrase you come across when you are looking to buy a used vehicle. It is generally believed that the water coming out of the silence is a verifiable sign of a healthy engine, perhaps rightly so. But it’s better to understand why exactly water comes out of the silencer/exhaust pipe, and is it always good to see a car throwing water out of its exhaust, or is it something you should be concerned of?

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There are a number of harmless reasons why you could be noticing this in addition to some more serious causes. Here’s what you need to know about water coming out from silencer and when exactly you should be worrying.

Engine Combustion Water Condensation

As combustion takes place in your car’s engine, a mixture of water and carbon dioxide is created. You are more likely to notice this condensation when the engine has cooled and exhaust gases exit the combustion chamber, mostly in the morning. This is when you’re likely to see water dripping from your car’s exhaust pipe.


Catalytic Converter Byproduct

The purpose of your car’s catalytic converter is to convert otherwise harmful emissions into things that are less harmful before they exit the exhaust. One of the many byproducts that this vehicle component produces is a small amount of water vapor.

Hot Engine Condensation

You may also notice water in your exhaust when the car’s engine first heats up, because in the heating process condensation can also take place inside the exhaust system and ends up in your silencer. But if water is continuously running from your exhaust after your car has been running for a while, you should be concerned. This is bad sign and there is a problem.

Smoke and Water Emissions

You should take particular notice if you see both smoke and water emitting from your exhaust and smelling like burning oil. This could be a sign of bad rings or a cracked piston in your car or coolant is leaking into your engine. Also, liquid coming from your tailpipe and having a particular sweet smell could be a sign of a more serious engine problem.

Related: What To Do If Your Car Overheats

Water leaking from the exhaust pipe is usually nothing to worry unless it’s coupled with other stranger malfunctions, and the brief instances when you see water dripping from the exhaust are likely negligible and does indicate that your engine is doing its job perfectly.


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A car enthusiast associated with the 3D Animation industry of Pakistan since year 2000 having worked with leading organizations and production facilities across Pakistan. Passionate about cars ever since, and a strong desire to see the automobile industry of Pakistan flourish in true means, Usman Ansari has a vast experience of writing for major automobile portals of the country. Drives a Honda City SX8 as a daily runner, as well as a 10th generation Toyota Corolla Gli. CarSpiritPK.com was initiated by Usman Ansari in May 2016.
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