FAQ – SCR Systems and Tec4 Ad-Blue Clean & Protect
Tec4 has launched a comprehensive FAQ page covering SCR systems and Ad-Blue service, designed specifically for professional workshops and fleet operators. Learn about common issues such as crystallization, injector contamination, and reduced SCR efficiency, and discover how Tec4 Ad-Blue Clean & Protect effectively prevents these problems while keeping the system performing at its best.
1. What is an SCR system and how does it work?
A Selective Catalytic Reduction (SCR) system is an emissions control technology used in diesel vehicles to reduce NOx emissions. The system injects Ad-Blue (urea solution) into the exhaust stream, which reacts in the catalyst to convert harmful nitrogen oxides into harmless nitrogen and water vapor.
2. Why do SCR system problems occur?
Common issues include:
- Ad-Blue crystallization: evaporation or chemical reactions can form crystals that block the system.
- Injector contamination: deposits on the Ad-Blue injector reduce spray efficiency.
- Reduced SCR efficiency: clogged or contaminated systems can lead to higher NOx emissions and engine power loss.
- Freezing issues: Ad-Blue can freeze in low temperatures, temporarily disabling the system.
3. How can SCR system problems be detected?
Signs include:
- Increased NOx emissions or fault codes from the vehicle diagnostic system
- Reduced engine performance or irregular operation
- Ad-Blue or SCR system warning lights
- Visible crystal formation or residue on the injector or in the system
4. How does Tec4 Ad-Blue Clean & Protect help?
Tec4 Ad-Blue Clean & Protect provides a complete SCR service solution:
- Breaks down existing crystals in injectors and lines
- Prevents new crystallization by stabilizing Ad-Blue fluid
- Cleans the Ad-Blue injector, ensuring optimal spray efficiency
- Lowers the freezing point of Ad-Blue to -20°C, improving reliability in cold conditions
- Restores SCR efficiency, reducing NOx emissions and preventing power loss
5. When should Tec4 Ad-Blue Clean & Protect be used?
- Preventive service: add with every Ad-Blue refill to prevent crystallization and contamination
- Corrective service: treat systems showing existing crystallization or injector blockages
6. Is the product safe for all diesel vehicles with SCR systems?
Yes, it is suitable for all vehicles with SCR systems, including trucks, campervans, buses, commercial vehicles, and modern diesel cars.
7. Does Tec4 Ad-Blue Clean & Protect prevent emissions and engine issues?
Yes. By keeping the SCR system clean and Ad-Blue fluid stable, the additive ensures optimal emission reduction, reduces fault codes and power loss, and helps avoid costly repairs.
8. How does this benefit workshops and fleet operators?
Regular use provides:
- Fewer SCR system failures and reduced vehicle downtime
- Lower service costs
- Improved emission compliance
- Extended service life of SCR components and injectors