Water In Cylinder: Is It Serious? (All You Need To Know)

Any foreign substance that enters a car cylinder will severely damage its functions. For example, water is not a compressible substance, causing your car engine to seize and stop functioning.

So, is the water in the cylinder serious? Yes, if water gets to your car cylinder, it is severe, the engine will refuse to start. As a result, you can’t use your car. 

The presence of the water inside your car cylinder will prevent combustion from happening, especially if the water level is high.

Also, it will cool the cylinder wall and stop contraction and expansion inside the engine. If you hear your car jolting or creating a heavy sputtering sound, the combustion inside has a problem.

Water contamination inside the cylinder corrodes the fuel lines, injectors, and pump. As a result, you will have to repair these all at once, surely costing you a lot.

The hydro locking also occurs when there is water in the internal combustion engine. Moreover, you can avoid water contamination in your car cylinder by checking it every day.

You can also lock it, especially if you have kids; they might accidentally put it inside your cylinder. 

If you want to lessen the possibility that your car cylinder gets contaminated with water, you can continue reading below.

Water In Cylinder

What Happens If Water Gets Into The Cylinder?

If a car cylinder is contaminated with water, the engine will not start no matter how you try because water, fire, and fuel aren’t a good mix. 

Unfortunately, water always finds its way into the engine, especially if your area is always raining or flood-prone. When water enters, it will create electrical faults inside or rust. 

How To Remove Water From An Engine Cylinder?

Removing water from an engine cylinder can be done at home. You can start by using a hand pump to suck out the contaminated fuel.

You should make sure that the pump hose reaches the bottom part of your fuel tank. Adding methanol is also helpful in reducing the water inside. 

What Causes Water In Engine Cylinders?

The cause of water in the engine is due to heavy rainfall and flooding. If you didn’t seal the fuel cap, the water could easily access inside. Always check the fuel cap to protect your engine cylinder from contamination. 

Water In Cylinder Head?

Water gets in the cylinder head due to leakage gasket. It may also be due to ice buildup inside your engine’s cooling system.

How Do You Get Water Out Of A Cylinder Head?

To get the water out of a cylinder head, first, you should dry every part affected by water. Next, remove the spark plugs and push a small cloth through the spark plug hole. 

If you can’t reach all the water inside, you can remove the spark plug and crank the engine to get all the water inside. 

Why Is There Water In My Cylinder Head?

Water always has its way to getting into the car engine part, like the cylinder head. But, especially if you are in a place that keeps on raining, you can put it in a dry place to protect your car. 

If there is a flood, you can wrap it in a large tarp to avoid your car engine getting damaged. You may also put your car in a high place. 

How To Check If Water Has Entered The Engine Cylinder?

You can observe that there is water entering the engine cylinder of your car if it won’t start. You can also tell that there is water inside it when it creates unusual noise. 

Can You Drive A Car With Water In The Engine Cylinder?

You can’t drive a car with water inside its engine cylinder. Once the water enters the cylinder, your fuel will react, causing it to break down the engine. If this happens, you can’t use your car because it won’t start. 

Can A Flooded Cylinder Fix Itself?

No, it won’t fix itself. It should be fixed by a professional. Flooded cylinders need to be drained by using specific tools to open them. 

Cylinders have sealed openings; after draining, you can use a pump to get excess water inside it before replacing new fuel. 

Related: Water In Engine Block


Water finds its way into the cylinder, especially during bad weather. If you let your car soak in the rain, the water droplets will get inside the cylinder. 

 Also, if you forget to lock its opening, water can easily access inside. When water contaminates inside the cylinder, it will cost you a repair. 

It can be costly, significantly, if it damages other parts near it. Take your car to a safe, dry place to avoid getting any droplets of water coming inside. If you have a car garage, you can put your car for safety.

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Image credits – Canva

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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