The EGR (Exhaust Gas Recirculation) system in your BMW 335d, while designed to reduce emissions, can often lead to decreased performance and reliability issues. An EGR delete for the 335d offers a solution by removing the EGR valve and cooler, preventing exhaust gases from re-entering the intake manifold. This article explores the benefits, installation process, and considerations for an EGR delete on a BMW 335d.
Understanding the EGR System and Its Drawbacks
The EGR system routes a portion of exhaust gases back into the intake, lowering combustion temperatures and reducing NOx emissions. However, this process can introduce soot and other contaminants into the intake manifold, leading to:
- Reduced airflow: Carbon buildup restricts airflow to the engine, hindering performance.
- Clogged intake manifold: Accumulated soot can clog the intake manifold, further reducing performance and potentially causing engine damage.
- Turbocharger issues: Soot can also damage the turbocharger vanes, impacting boost pressure and efficiency.
- Cooler failure: The EGR cooler, responsible for cooling the recirculated exhaust gases, is prone to leaks and failures.
Benefits of an EGR Delete 335d
Performing an EGR delete on your 335d offers several advantages:
- Increased performance: By eliminating the recirculation of exhaust gases, the engine receives a cleaner, denser air charge, resulting in improved power and throttle response.
- Improved reliability: Removing the EGR cooler eliminates a potential point of failure, enhancing overall engine reliability.
- Cleaner intake system: Preventing soot buildup keeps the intake manifold and turbocharger clean, ensuring optimal performance and longevity.
- Lower intake temperatures: Cooler intake air leads to denser air charge and increased power output.
EGR Delete Kit Installation
EGR delete kits for the 335d typically include a replacement pipe or blanking plate for the EGR valve and block-off plates for the EGR cooler. Installation involves removing the EGR valve and cooler and installing the components from the kit. It is highly recommended to have this procedure performed by a qualified mechanic experienced with BMW diesel engines.
Important Considerations
While an EGR delete offers performance and reliability benefits, it’s crucial to consider the following:
- Emissions regulations: Removing the EGR system can affect your vehicle’s compliance with emissions regulations. Check local laws before proceeding.
- ECU reprogramming: After deleting the EGR, the vehicle’s ECU (Engine Control Unit) will likely detect a fault and trigger a warning light. Reprogramming the ECU is necessary to disable the EGR function and prevent the warning light.
- Professional installation: Due to the complexity of the procedure and the potential for ECU reprogramming, professional installation is strongly recommended.
Conclusion
An EGR delete for the BMW 335d can significantly improve performance and reliability by eliminating the drawbacks associated with the EGR system. While there are legal and technical considerations, the potential benefits make it a popular modification among 335d owners seeking enhanced performance and longevity. Consult with a qualified mechanic and ensure compliance with local regulations before proceeding with an EGR delete. Remember that Darkside Developments offers professional installation services for their EGR delete kits, ensuring a hassle-free experience.
