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Cars have an interesting relationship with water. Standing water, combined with road salt, leads to rust. And depending on where you live, rainwater can even cause paint damage. But we also need water to keep cars clean and prevent other kinds of damage. And water mixed with antifreeze helps keep modern engines cool. But it can be disconcerting to see water coming from your cars exhaust pipes. Especially if you havent been driving it in some time. But is this something you should be worried about? Car exhausts do normally emit some water Water flows from the exhaust of a car in Boxmeer, on June 3, 2016. (Photo credit should read KOEN VAN WEELAFP via Getty Images) While it is true that gasoline, especially if its been sitting for some time, can be contaminated with water. And if that happens, that can cause engine damage. However, as Advanced Auto Parts explains, its totally normal for you to see a bit of water dripping from your cars exhaust. For a gasoline or diesel car to work, it has to ignite fuel in the presence of air. Specifically, reacting the gasoline or diesel, which is a hydrocarbon, with oxygen. This produces CO2 as well as H20—aka water vapor. The water vapor thats really hot doesnt actually look like steam or vapor; its invisible. But, if your cars been shut off for some time, the hot exhaust gases have had time to cool. So, the vapor condenses into liquid water. Then, when you turn the engine on again, it gets pushed out of the tailpipe. Also, Mechanic Base reports a car engine is particularly hot when its first turned on before oil and coolant have had time to circulate. If its particularly cold outside, these extra-hot exhaust gases can look like steam, or even condense somewhat into water. In addition, your catalytic converter also produces water as it does its job. The combustion process unwanted side-products like carbon monoxide, NOx, and potentially SOx; aka smog. Converting the carbon monoxide and smog into less-harmful emissions creates water vapor. However, while a little water coming from your car exhaust isnta problem, a lot of water is another story. Excessive water and smoke signal a problem If youre noticing that, even after youve been driving your car for some time, the waters still coming out its exhaust, theres something wrong with your car. White exhaust smoke, with a sweet odor in the air, means your engines burning coolant, It Still Runs reports. There are several potential causes for this. One possibility is a head gasket leak, It Still Runs reports. The head gasket is what separates the engines combustion chambers from oil, coolant, and contaminants. Because it is a physical seal, over time the gasket can fail. Or, if the engine overheats, for example, if the water pump fails, the head gasket can fail along with it. Luckily, this is a fairly simple and inexpensive fix. A coolant leak, though, can have more severe causes. Itspossible a cylinder or the engine block itself is cracked. If thats the case,its possible to run a compression test on each cylinder. If the results aretoo low, theres a crack somewhere. While it can be repaired, often times thismeans youll need a new engine. Whitish smoke and water, though, arent the only things that can come out of your car exhaust. What else your car exhaust can tell you Black smoke, Car Throttle explains, is a sign of unburned fuel. This can be caused by a blocked fuel injector, faulty oxygen or air-flow sensor, or a broken fuel pressure regulator. A sufficiently-dirty air filter can also introduce contaminants, which interfere with the combustion process. And, of course, there are the coal-rollers, who deliberately aim to do this with their diesel trucks. Bluish or blue-black smoke, though, signals an oil leak.This can be caused by damaged piston rings, which normally seal the piston headagainst the cylinder wall. But, if theyre worn down enough, the oil lubricatingthe wall can seep into the combustion chamber and burn. Damaged valves or valeseals can also leak oil. But if the only thing coming out of your car exhaust is abit of water, youre in the clear. Follow more updates from MotorBiscuit on our Facebook page. The exhaust system in your car works by getting rid of the byproducts that are created when your car is running. The byproducts are expelled through the tailpipe and you may find a little bit of water leaking out of the tailpipe. This typically isnt a huge concern, it just means that there is a little bit of water in your exhaust system that needs to get out. Sometimes what you see could be more serious, so make sure you read this full article to help you determine if you need to get your car checked out by a professional. Get a free quote However, if you are worried that something isnt right, it doesnt hurt to get your vehicle checked out by one of our mobile mechanics at Wrench. We are working towards bringing more convenient ways of repairing your car for a better price. Our services are mobile, so if you are in a safe place, we can come to work on your vehicle then and there. We are just a friendly phone call away, book your appointment today!Share our infographic with your friends and family!Main Reasons for Water Dripping Out From the Exhaust:Engine Combustion and Water CondensationAs combustion takes place in your vehicles engine whenever the vehicle starts, a mixture of water and carbon dioxide is formed. When the engine cools down completely and exhaust gasses exit the combustion chamber, condensation of water and carbon dioxide can be noticed much more, and in a moment like this, you notice water dripping from your cars exhaust pipe. This is completely normal and you dont have to take your car to a professional.Catalytic Convertor ByproductCatalytic converter plays a major role in reducing the pollutants that go into the environment. It transforms the byproducts of vehicles into substances that do not harm the environment. It converts the toxic waste products of the vehicle into non-harmful components as in water or gas form. Water dripping out from exhaust is an example of a catalytic convertor working at its best and this is not something that you should be worried about. Another issue specifically with catalytic converters is theft. In 2020 and 2021, the number of cases of catalytic converter theft has been rising dramatically. To learn more about catalytic converter theft and what you can do to protect yourself, click here!Condensation From HeatIf your car is in a colder climate, it will need to warm up before it can work properly. This causes excess heat to be built up in your car and is later expelled through the tailpipe. That heat will produce condensation in your exhaust system, so you will see water droplets coming out of your tailpipe. This has the potential to be dangerous, but all you need to do is let the engine run for a few minutes before you start driving.Smoke and Water EmissionsIf you notice smoke and water coming out of your tailpipe, this could be a big warning sign that your pistons are not working properly. If the situation is a more serious one, you might also notice a burning smell or a sweet smell. This is very serious and you should get your vehicle checked out by one of Wrenchs mobile mechanics as soon as possible so we can keep your car safe and sound on the road.Now that you know what kind of water from the exhaust pipe is serious and what is not, we hope that you can move on with your day with peace of mind. However, if you noticed that smoke and water are coming out of your exhaust pipe, you might be a little bit worried. To get your car checked out by one of our ASE-certified mobile mechanics, click the button below and fill out our short service request form. We will make sure we thoroughly inspect your vehicle so you can get back on the road safely. How To Book A Diagnostic Appointment With Wrench If you need our mobile mechanics to come take a look at your vehicle, book an appointment today! All you need to do is click the button below to go to the homepage of our website or download our mobile app. Then you will sign into your Wrench account if you already have one, or you can create an account on the spot. We will need to know what kind of car you have if it isnt already saved in our system, so be prepared to give us the year, make, and model of your car as well as the VIN and license plate numbers.Then you will be able to select the services that your car needs. If you have a particular service in mind, such as an oil change or tire rotation, let us know. If you are experiencing issues with your car such as water coming out of your exhaust pipe, you can book a diagnostic if you dont know which part of your car is failing. To learn more about our diagnostic services, click here!Then we will provide you with a FREE auto repair quote, including both time and cost estimates, so you can book you appointment on a date that will work the best for you. Once you have choose a date, time, and location for your auto repair or maintenance appointment with Wrench, you will be able to sit back and relax knowing we got your back! Get a free quote

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