Lots Of Water Coming Out Of Exhaust: Why And What To Do?

Your exhaust system that you find in your vehicle is there to get rid of the byproducts that are made if your vehicle is running. The byproducts are coming out through the tailpipe. Some car drivers can also find some water that is leaking out of their tailpipes. 

So why is there a lot of water coming out of your exhaust and what can you do about it? There are plenty of reasons why there is a lot of water coming out of your exhaust and each reason has different solutions. So what you have to do first is that you have to know the cause so that you will know the solution.

Most of the time, this is not something that should worry you. Sometimes, it just means that there is little water in your exhaust system, and it will have to go out. However, there are also sometimes that this is a difficult situation. 

With that, this article is made to provide knowledge to those car drivers who are having a hard time figuring out what’s wrong with their exhaust system. In this article, we’ll discuss whether you need to have your vehicle checked by a professional. 

So if you are worried about your exhaust system, make sure to read this article. You will be able to know a lot about the exhaust system. 

So without further ado, let’s get started. 

Lots Of Water Coming Out Of Exhaust

Is Water In Exhaust Bad?

It depends. Water in your exhaust is not considered harmful, and sometimes, it is called normal. Combustion gasses have one part, and it is water vapor. 

It will drip from the tailpipe because it condenses in a cold or an excellent exhaust system. If the system is then fully warmed up, you will not see any liquid dripping from the exhaust. These water droplets will drop out of the exhaust, which is a good sign of a healthy engine. 

So it means that the air or the air-fuel mix is undergoing complete combustion in the combustion stroke. After the combustion, there will be black smoke, which means that the charge has too much fuel. It would not also give out carbon monoxide and nitrides. 

If there is a cloud of white smoke, some part of the fuel will be left unburnt. This will equate to a poor economy, and the performance of your vehicle will drop. 

There will also be pollutants. So a healthy engine means that there is clear smoke with water droplets.

What Can Cause Water From Exhaust?

There can be a few reasons why there’s water that is coming out of your exhaust. We will list down below these causes. 

1. Water Condensation And Engine Combustion

Combustion will happen in your vehicle’s engine if your vehicle starts, and there will be a mixture of carbon dioxide and water, and it will form. If the engine cools down, it will completely cool down the engine. The exhaust gasses will exit the combustion chamber. 

The condensation of the carbon dioxide and the water will be noticed more, and you can notice water dripping from your vehicle’s exhaust pipe. This is a regular occurrence, and you might not have to take your vehicle to a professional. 

2. Catalytic Convertor Byproduct

A catalytic converter is playing a vital role in decreasing the pollutants that will go into the environment. The byproducts of the vehicles will be transformed into substances that will not harm the environment. The waste products of the vehicle will be converted into components that are not harmful, like in water or in the form of gas. 

If there is water dripping out of your exhaust, it can mean that the catalytic converter is working its best. You should not worry about this situation. There is another issue with the catalytic converter. 

It is theft. Way back in the years 2020 and 2021, the number of cases of catalytic converter theft has been rising. 

3. Condensation Produced By Heat

If you’re in a cold climate, your vehicle will be needed to warm up to work in a proper manner. This will cause an excess in heat that will be built up in your vehicle. It will also be later expelled into the tailpipe. 

The heat will then make some condensation in your exhaust system. With that, you will see water that is dropping out of your tailpipe. This situation can be dangerous, but you just have to let your engine run for just a few minutes before you start driving. 

4. Water Emissions And Smoke Emissions

If you notice that water and smoke are going out of your tailpipe, this is a significant sign that your pistons are not working correctly. There is also a more complex situation. 

You might notice that there is a burning smell or a sweet smell inside or around your vehicle. This can be a difficult situation. You must bring your vehicle to be checked by an expert. 

Water Coming Out Of Exhaust

How Do I Get Water Out Of My Exhaust?

If you notice that water is coming out of your tailpipe if you start the engine, it can be a clear sign that your system reservoir is full of fuel residues. So how do you get water out of your exhaust? First, you must operate your car in a way that will lessen the build-up of the fluid. 

In winter, you need to warm up your engine. You can do this with a reduced speed. This will make your entire exhaust system so that it can warm up quickly. 

Your vehicle must then run for at least forty minutes. Experts also advised that you do not include short trips in the winter. In a long drive and you have high speeds, the entire water in your exhaust system will turn into steam. 

It will then be removed by itself. You can call this muffler drying. This is the most effective way so that you can remove the fluid from your exhaust system. 

You can remove water from your tailpipe by heating your exhaust system so that the water will evaporate. You can run your vehicle at high speeds for forty minutes or more in just one month.

Water Coming Out Of Exhaust When Starting Car: What To Do?

If your vehicle is in a cold climate, you need to warm it up to work properly. This will then cause an excess of heat to build up in your vehicle. It will then be expelled through your tailpipe. 

The heat will cause condensation in your exhaust system. You will then see water that is coming out of your tailpipe. Again, this can be dangerous but you can allow your engine to run for just a few minutes before you will start driving. 

Water Coming Out Of Exhaust When Revving: What To Do?

Sometimes, this is just normal. Sometimes, this can also be dangerous. But what you can do is you have to allow your engine to run for just a few minutes. 

You have to run your vehicle for a few minutes before you will drive your vehicle. If you do not know what to do, then you have to consult an expert. Bring your vehicle to a mechanic. 

Water Coming Out Of Exhaust While Idling: What To Do?

If there’s water coming out of your exhaust while your vehicle is idling, it can be expected sometimes. But if there will be a continuous drip after driving or during driving, you have to check your cylinder head gasket. 

You need to check if there are any damages. You have to note that if the water is dripping, the white smoke will be noticeable if there is damage to your vehicle. Have your vehicle checked by an expert. 

Water Coming Out Of Exhaust While Running: What To Do?

Sometimes, it can be expected. But to be sure, you have to take your vehicle to a mechanic. They will know what to do, and they can diagnose your vehicle much correctly. 

Oily Water Coming Out Of Exhaust: What To Do?

Suppose there is smoke that is coming out of your exhaust pipe. You can notice it. However, if you have oil that is coming out of your exhaust pipe, it is a different scenario. 

An oil leak can be tricky. If there is oil coming out of your vehicle’s exhaust pipe, it can be a sign that there is a severe failure, or you have a wear in the internal components in your engine. You can have wear in your valve guides. 

You might also have damaged or broken piston rings and a bad head gasket. An oil that is coming out of your exhaust pipe is a sign that your vehicle has problems. 

You need to have your car looked at by a professional mechanic. It must be repaired as soon as possible so that you can avoid further damage to your vehicle. 

Water In Exhaust But Not In Oil: Is That Ok?

Water is a byproduct of the internal combustion of gasoline engines. There is a cooling system pressure test, and it will tell you if there are any external or internal cooling systems leaking. If the leak is internal and you find it in a cylinder head down test, it will tell you where it is. 

Cooling and heating will make the water condense inside your exhaust system. But it is just condensation. 

Condensation is very common in cold weather. The moisture in the air will warm up your running engine. It will then cause fog in your exhaust system. 


In summary, many car drivers have been reporting that a lot of water is coming out of their exhaust. Most times, a lot of car drivers are confused and scared about the meaning of this. 

There are many reasons why there’s a lot of water coming out of your exhaust. You have to know what the reason is so that you can know what to do.

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My name is Hank, and I've been in the automotive industry for 27 years. I've been working in my own auto repair shop for the last 13 years, and now I want to help you here, on my blog. Let me know if you have any questions. Read more