Deleting the EGR (Exhaust Gas Recirculation) system on a Detroit Diesel DD15 engine involves ECM tuning and physically blocking off the EGR gas flow. This guide provides a comprehensive overview of the process. While this modification can offer potential benefits, it’s crucial to understand and comply with all local, state, and federal emissions regulations before proceeding. This information is for off-road use only.
DD15 EGR Delete: ECM Tuning and Block Off Plates
A complete DD15 EGR delete requires two key steps: ECM (Engine Control Module) tuning and blocking the EGR gas flow with plates. The ECM tuning adjusts the engine’s parameters to operate without the EGR system. This often includes deleting other emissions components like the DPF (Diesel Particulate Filter), DOC (Diesel Oxidation Catalyst), SCR (Selective Catalytic Reduction), and DEF (Diesel Exhaust Fluid) systems. Our Detroit EGR delete tuning provides a mild, fleet-safe power upgrade and potential fuel efficiency improvements. We offer delete tunes for a range of Detroit Diesel engines.
After the ECM is tuned, you can proceed with blocking off the EGR valve. This involves installing steel plates on both the hot and cold sides of the EGR system to prevent exhaust gas recirculation.
EGR Block Off Procedure: Hot and Cold Side Blocking
The EGR block off procedure is similar across various engine models. It involves placing steel plates on both the hot and cold sides of the EGR cooler. The hot side block off plate is installed where the EGR manifold connects to the exhaust manifold. The cold side block off plate is placed where the EGR manifold connects to the intake manifold.
Blocking both sides is recommended for optimal engine performance. This method minimizes the risk of air leaks on the intake (cold) side and exhaust leaks on the exhaust (hot) side.
This image shows the location of the block off plates on the exhaust side of a Detroit Diesel DD15 engine. The DD13 and DD16 engines have similar configurations.
In this example, expansion plugs were used to block both ends of the EGR flex pipe.
This image illustrates how expansion plugs (freeze plugs) are used to block off the EGR flex pipe on a DD15 engine.
On the intake side, the crossover pipe needs to be unbolted. A block off plate is then inserted between the crossover pipe and the intake manifold.
This image depicts the location of the block off plate on the intake side (crossover pipe) of a Detroit Diesel DD15. The DD13 and DD16 engines have similar layouts.
Conclusion
A Dd15 Egr Delete Kit, encompassing ECM tuning and block off plates, can modify your engine’s emissions system. Remember to adhere to all applicable laws and regulations regarding emissions modifications. This guide provides a general overview for informational purposes only and should not be considered a substitute for professional mechanical advice. Always consult with a qualified diesel mechanic for any maintenance or modifications to your vehicle.
