How To Get Water Out Of My Gas Tank

Water in your gas tank is a common problem that can cause a range of issues, from poor engine performance to complete engine failure. This article will guide you through the steps on how to get water out of your gas tank, explain why it's important to address this issue promptly, and offer tips on preventing it in the future.

Why is Water in Your Gas Tank a Problem?

While a small amount of condensation in your fuel tank is usually harmless, a significant accumulation of water can lead to serious problems. Here's why:

• Corrosion: Water promotes rust and corrosion within the fuel tank and fuel lines. This can lead to fuel leaks and the introduction of rust particles into the fuel system.
• Poor Engine Performance: Water doesn't burn like gasoline. When water enters the engine, it disrupts the combustion process, causing misfires, rough idling, and reduced power. You might notice the engine sputtering or struggling to accelerate.
• Fuel System Damage: Water can damage sensitive fuel system components like the fuel pump, fuel injectors, and fuel filter. Replacing these parts can be expensive.
• Freezing: In cold weather, water in the fuel tank can freeze, blocking fuel lines and preventing the engine from starting. This is particularly problematic in regions with freezing temperatures.
• Phase Separation (Ethanol Blended Fuels): Modern gasoline often contains ethanol. Ethanol readily absorbs water. If the gasoline absorbs too much water, it can cause phase separation. This means the ethanol and water separate from the gasoline, forming a layer of water-ethanol mixture at the bottom of the tank. Your engine then tries to run on this mixture, leading to severe performance issues or complete failure.

How to Choose the Right Method to Remove Water

The best method for removing water from your gas tank depends on the severity of the problem. Here are a few options:

1. Fuel Additives (Water Absorbers)

For small amounts of water, a fuel additive designed to absorb water might be sufficient. These additives, often labeled as "fuel system dryer" or "water remover," contain chemicals that bind to water molecules, allowing them to be burned safely along with the gasoline. Here's how to use them:

1. Read the Instructions: Carefully read and follow the instructions on the fuel additive bottle. Pay attention to the recommended dosage for your fuel tank size.
2. Pour into the Tank: Pour the recommended amount of additive into your fuel tank.
3. Fill Up the Tank: Fill the fuel tank with fresh gasoline. This helps distribute the additive throughout the fuel system.
4. Drive: Drive the vehicle as normal. The additive will work its way through the fuel system, absorbing the water and allowing it to be burned off.

Important: Fuel additives are effective for small amounts of water. If you suspect a significant amount of water in your tank, a more thorough method is required.

2. Siphoning the Fuel Tank

Siphoning involves using a hose to drain the fuel tank. Since water is heavier than gasoline, it will settle at the bottom of the tank. This method allows you to remove the water-contaminated fuel from the bottom of the tank. Here's how to do it:

1. Safety First: Work in a well-ventilated area and avoid sparks or open flames. Gasoline is highly flammable. Wear safety glasses and gloves.
2. Gather Supplies: You'll need a siphon hose, a clean fuel container (approved for gasoline storage), and possibly a hand pump.
3. Locate the Fuel Tank Access: On some vehicles, there's a drain plug on the bottom of the fuel tank. If not, you'll need to access the tank through the fuel filler neck.
4. Insert the Hose: Carefully insert the siphon hose into the fuel tank, ensuring it reaches the bottom. If accessing through the filler neck, you might need to navigate past anti-siphon devices. A flexible hose is essential for this.
5. Start the Siphon: Use a hand pump or the siphon hose itself (following the manufacturer's instructions) to start the siphon.
6. Drain the Fuel: Drain the fuel into the container. Monitor the fuel as it drains. You'll likely see a layer of water and debris at the bottom. Continue draining until you see clean gasoline.
7. Dispose of Contaminated Fuel Properly: Take the contaminated fuel to a local recycling center or hazardous waste disposal facility. Do not pour it down the drain or onto the ground.

3. Draining the Fuel Tank Completely

This is the most thorough method and is recommended if you suspect a large amount of water in the tank or if the engine is experiencing significant performance issues. It involves completely draining the fuel tank and potentially cleaning it. This is best performed by a qualified mechanic. Here's a general overview of the process:

1. Safety First: As with siphoning, safety is paramount. Work in a well-ventilated area, avoid sparks or open flames, and wear safety glasses and gloves.
2. Disconnect the Fuel Pump: The fuel pump needs to be disconnected before draining the tank. Consult your vehicle's repair manual for the location and procedure for disconnecting the fuel pump. This prevents the pump from running dry and potentially being damaged.
3. Locate the Fuel Tank Drain: Some vehicles have a drain plug on the bottom of the fuel tank. If not, the fuel lines will need to be disconnected.
4. Drain the Fuel: If a drain plug exists, open it and allow the fuel to drain into a suitable container. If disconnecting fuel lines, be prepared for fuel to spill. Use appropriate containers and absorbent materials to catch any spills.
5. Inspect the Tank: Once the tank is empty, inspect the inside for rust, debris, or excessive water. If necessary, clean the tank with a fuel tank cleaner.
6. Reassemble: Reconnect the fuel lines or drain plug securely. Reconnect the fuel pump.
7. Add Fresh Fuel: Add fresh, clean gasoline to the tank.

Warning: Draining the fuel tank completely can be a complex and potentially dangerous procedure. If you are not comfortable working with fuel systems, it is best to have a qualified mechanic perform this task.

Real-World Owner Experiences

Many car owners have experienced the frustration of water in their gas tanks. Here are some common scenarios and solutions:

Preventing Water from Entering Your Gas Tank

Prevention is always better than cure. Here are some tips to prevent water from accumulating in your gas tank:

• Keep Your Gas Tank Full: A full gas tank minimizes the amount of air inside the tank, reducing the opportunity for condensation to form.
• Check Your Gas Cap: Ensure your gas cap is properly sealed. A loose or damaged gas cap can allow water to enter the tank. Replace the gas cap if it is cracked or damaged.
• Use Fuel Stabilizer: If you plan to store your vehicle for an extended period, add a fuel stabilizer to the tank. Fuel stabilizers help prevent the breakdown of gasoline and the formation of water.
• Purchase Fuel from Reputable Stations: Choose gas stations that are well-maintained and have high fuel turnover. This reduces the likelihood of purchasing fuel that has been contaminated with water.
• Be Wary of Flooding: Avoid driving through deep water, as this can potentially flood the fuel tank vent and allow water to enter.

Frequently Asked Questions (FAQs)

Here are some frequently asked questions about water in gas tanks:

• Q: Can I drive with water in my gas tank?
  A: It's not recommended. Driving with water in your gas tank can damage your engine and fuel system. The longer you drive with water in the tank, the more severe the damage can be.
• Q: How much does it cost to have a mechanic drain my gas tank?
  A: The cost can vary depending on the vehicle and the mechanic's labor rates, but it typically ranges from $100 to $300.
• Q: Can water in my gas tank cause my car to fail an emissions test?
  A: Yes, water in the gas tank can lead to incomplete combustion, resulting in higher emissions levels and a potential failure of the emissions test.
• Q: Is it safe to use rubbing alcohol (isopropyl alcohol) to remove water from my gas tank?
  A: While some people suggest using isopropyl alcohol, it's generally not recommended. It can be corrosive to certain fuel system components, especially in older vehicles. It's better to use a fuel additive specifically designed for water removal.
• Q: How do I know if my gas has phase separated?
  A: Symptoms include difficulty starting, rough idling, poor acceleration, and a noticeable decrease in fuel economy. If you suspect phase separation, it's best to drain the fuel tank completely.

By following these guidelines, you can effectively remove water from your gas tank and prevent future occurrences, ensuring the longevity and performance of your vehicle's engine.