Accidentally putting AdBlue in the fuel tank can cause significant damage to your vehicle. AdBlue is designed to reduce emissions in diesel engines, but it should never mix with fuel. If this mistake occurs, it’s important to act quickly to avoid costly repairs. In this article, we will explore the consequences of putting AdBlue in the fuel tank and the steps you should take to fix it.
What Is AdBlue and Its Purpose?
AdBlue is a liquid solution used in diesel vehicles equipped with Selective Catalytic Reduction (SCR) systems. Its purpose is to reduce harmful nitrogen oxide (NOx) emissions by converting them into nitrogen and water. AdBlue is stored in a separate tank and injected into the exhaust system, never mixing with the fuel.
Key Features of AdBlue:
- Composition: A mixture of deionized water and urea.
- Purpose: Reduces nitrogen oxide emissions in diesel vehicles.
- Separate Tank: Must never be mixed with diesel or petrol.
Consequences of Putting AdBlue in the Fuel Tank
Accidentally adding AdBlue in fuel tank is a serious issue that can lead to engine damage. Since AdBlue is made up of water and urea, it is not suitable for combustion in diesel or petrol engines. When it enters the fuel system, it can cause multiple problems, including clogged filters, corrosion, and damaged fuel injectors.
1. Fuel Contamination
One of the main issues is fuel contamination. AdBlue is not a fuel; it’s a chemical additive. When it mixes with diesel or petrol, it contaminates the fuel, causing it to become unusable. This prevents the engine from running properly, and in most cases, the vehicle won’t start.
2. Damage to Fuel System Components
AdBlue can damage various components of the fuel system, including:
- Fuel Injectors: AdBlue can block and corrode the fuel injectors, leading to inefficient fuel delivery.
- Fuel Pump: The fuel pump may become clogged or damaged by AdBlue, which is not designed to pass through it.
- Filters and Fuel Lines: Since AdBlue is water-based, it does not mix well with fuel and can cause blockages in filters and fuel lines.
3. Engine Failure
If the vehicle is driven with AdBlue in the fuel tank, the contaminated fuel can lead to engine failure. The engine may misfire, stall, or fail to start at all. This can result in extensive repairs and the need to replace key components like the fuel injectors, fuel pump, and even parts of the engine itself.
Immediate Actions After Putting AdBlue in the Fuel Tank
If you realize that you’ve accidentally put AdBlue in the fuel tank, follow these steps to minimize the damage:
1. Do Not Start the Engine
The most critical step is to avoid starting the engine. Starting the vehicle will circulate the contaminated fuel throughout the system, leading to more severe damage. If the car has already been started, turn it off immediately.
2. Contact a Professional Mechanic
Once you’ve realized the mistake, the next step is to call a professional mechanic. They will be able to drain the fuel tank and flush the system to remove the AdBlue. This needs to be done before any fuel circulates through the engine.
3. Drain the Fuel Tank
The mechanic will need to drain the fuel tank completely to remove the contaminated diesel or petrol. This is essential to prevent AdBlue from reaching the engine or other critical parts of the fuel system.
4. Replace the Fuel Filter and Flush the System
Even after draining the fuel, the fuel filter will need to be replaced. AdBlue can leave behind residues that block the fuel filter, which can cause long-term damage. Flushing the fuel lines and replacing the fuel filter will ensure that the fuel system is clean.
5. Refuel with Clean Diesel or Petrol
Once the system has been thoroughly cleaned and the fuel filter replaced, the mechanic will add clean diesel or petrol to the tank. This will ensure that the engine receives proper fuel and can run efficiently without further damage.
Long-Term Effects of AdBlue in the Fuel Tank
If AdBlue circulates through the fuel system, the long-term effects can be severe. Even after flushing the system, some residual damage may occur if the issue is not addressed quickly.
1. Corrosion of Fuel Components
AdBlue can cause corrosion in metal parts of the fuel system, such as the fuel injectors and the fuel pump. This corrosion can lead to long-term performance issues and eventually require the replacement of these parts.
2. Damage to Engine Sensors
AdBlue contamination may also damage the vehicle’s engine sensors. Sensors responsible for monitoring fuel delivery and engine performance may fail due to exposure to AdBlue, leading to further engine malfunctions.
3. Costly Repairs
If the issue is not resolved quickly, the cost of repairs can be significant. In severe cases, components like the fuel pump, fuel injectors, and even parts of the engine may need to be replaced. These repairs can be expensive and time-consuming.
How to Prevent Putting AdBlue in the Fuel Tank
Prevention is always better than cure, especially when it comes to avoiding this mistake. Follow these tips to ensure that you never accidentally add AdBlue to the fuel tank:
1. Use Clearly Labeled Fuel Caps
Make sure that your vehicle’s fuel cap and AdBlue tank cap are clearly labeled. This will help you avoid confusion when refueling. In many modern vehicles, the AdBlue tank is a different size and color to prevent mix-ups.
2. Pay Attention While Refueling
Always stay focused while refueling. If you’re driving a different vehicle or unfamiliar with where the AdBlue tank is, take a moment to check the labels. Being aware and alert at the pump can save you from costly mistakes.
3. Know Your Vehicle’s AdBlue Requirements
If your vehicle uses AdBlue, understand where it goes and how to fill it properly. The AdBlue tank is separate from the fuel tank, and the two should never mix. If you’re unsure, consult your vehicle’s manual or ask for help at the fuel station.
4. Check the Pump Before Filling
Before refueling, double-check the pump to ensure you are using the correct one. Diesel and AdBlue pumps are usually labeled, but it’s always a good idea to verify before filling your tank.
Conclusion
Accidentally putting AdBlue in the fuel tank can lead to serious engine damage and costly repairs. If you notice the mistake, the best course of action is to avoid starting the car and contact a mechanic immediately. Draining the fuel tank, replacing the fuel filter, and flushing the system are essential steps to avoid further damage.
Preventing this issue is simple: stay alert while refueling, double-check the labels on the pumps, and make sure your vehicle’s AdBlue and fuel tanks are clearly marked. By following these precautions, you can avoid the costly consequences of mixing AdBlue with fuel.
Read More Related Article Click Here
