WHAT HAPPENS IF I'VE PUT ADBLUE INTO THE DIESEL TANK
Putting AdBlue (also known as Diesel Exhaust Fluid, or DEF) into a diesel fuel tank is a very serious and potentially costly mistake. Unlike misfuelling diesel for petrol, where the primary risk is poor combustion, AdBlue creates a corrosive chemical problem in the fuel system.
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The Immediate Chemical Reaction
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AdBlue is a solution of de-ionized water and urea. It is designed to be injected into the exhaust gases (not the fuel) to reduce emissions.
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AdBlue is corrosive to metals like aluminum, brass, and some common steel alloys found in the fuel system.
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AdBlue and Diesel Do Not Mix: The solution is denser than diesel and will sink to the bottom of the tank. If the engine is started, the fuel pickup will immediately draw the concentrated AdBlue/water solution into the fuel lines.
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What Happens When the Engine is Started
Corrosion: The AdBlue solution attacks the metal components of the fuel system, including the fuel pump, fuel lines, and high-pressure injection pump. This can cause components to seize or fail.
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Crystallization and Blockages: When the water in the AdBlue evaporates or is subjected to heat, the urea component quickly solidifies, forming crystals. These crystals clog the fine components of the fuel system, especially the highly sensitive fuel injectors.
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Fuel System Failure: The high-pressure diesel fuel system operates at thousands of PSI. AdBlue contamination can destroy the high-pressure pump and injectors, which are among the most expensive components in a modern diesel engine.
ADBLUE IN DIESEL FUEL TANK
If you've suffered the serious mistake of putting AdBlue into your diesel tank, immediate professional help is essential to prevent system failure. Do not start your engine! The Petrol Doctor specializes in AdBlue in diesel tank recovery, offering a crucial 24/7 emergency service. AdBlue is highly corrosive and, if circulated, will quickly crystallize and destroy your expensive fuel pump and injectors. Our expert mobile technicians will come to you to safely drain and dispose of the contaminated fluid, thoroughly flush the entire fuel system, and replace critical filters, ensuring your vehicle is recovered swiftly and damage is minimized.
Wrong Fuel In Car Symtoms
In general, if you have started the engine after misfuelling, you may notice:
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Difficulty starting or the engine failing to start at all.
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The engine stalling or cutting out shortly after leaving the forecourt.
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A noticeable loss of power or slower-than-usual acceleration.
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Unusual noises from the engine, such as loud knocking or rattling.
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Excessive smoke from the exhaust.
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The Engine Warning Light (EML) illuminating on the dashboard.
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