How to Add Urea to a Diesel Vehicle?
2 Answers
In diesel vehicles, there is a separate urea filling port. Simply open the port and add the urea. The most basic function of automotive urea solution is to convert nitrogen oxides in vehicle exhaust into harmless nitrogen and water, which is energy-saving and environmentally friendly, enabling the vehicle to meet the national exhaust emission standards. Below is an introduction to automotive urea: 1. Origin: Automotive urea solution was first used in Europe, where it is called AdBlue. In North America, it is referred to as DEF (Diesel Exhaust Fluid), and in China, it is known as automotive urea solution or "automotive denitrification agent." However, it is now generally referred to as "automotive urea" in China. 2. Function: Automotive urea solution is crucial for reducing pollutant emissions from diesel vehicles. It is a urea-based chemical reactant, composed of high-purity urea and deionized water, forming a solution with a concentration of 32.5%. The application of automotive urea solution in the SCR system is key to ensuring that engine exhaust emissions meet the National IV and higher emission standards.
When I first started driving a diesel car, I was also confused about how to add urea, but I figured it out through trial and error. First, locate a small blue cap under the hood—that’s usually the urea filler port; don’t mistake it for the fuel tank cap. Go to an auto parts store and buy dedicated automotive urea fluid, like AdBlue, and never use plain water or cleaning agents, as they can damage the emission system. Before filling, prepare a funnel to prevent spills. I wear gloves because urea is slightly corrosive—just pour it gently until full, avoiding haste to prevent splashing on the car paint, which is hard to clean. After filling, tighten the cap and start the car to let the system circulate automatically. Check the fluid level roughly every 5,000 km, and if the warning light comes on, refill immediately. The first time might feel a bit nerve-wracking, but it becomes simple with practice, and it helps reduce exhaust pollution.
