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EGR Delete or Keep? Insights for Cummins Engine Owners

Explore the costs, benefits, and top kits for 6.7 Cummins EGR delete. Optimize engine performance with expert insights.


The Exhaust Gas Recirculation (EGR) system plays a crucial role in managing emissions and engine performance in 6.7 Cummins engines. Understanding its function and the implications of cleaning or deleting it is essential for diesel vehicle owners.

1: Analysis of 6.7 Cummins EGR Cleaning Costs

Professional vs. DIY EGR Cleaning

When considering EGR maintenance, cost is a significant factor. Professional services for EGR cleaning can vary widely, typically ranging from $200 to $500 depending on location and service provider. For those inclined towards DIY solutions, the cost can be significantly reduced to around $50-$100, primarily spent on cleaning solutions and basic tools.

Explore the detailed breakdown of professional EGR cleaning costs and DIY methods.

2: Overview of EGR Delete Kits and Selection Guide

What is an EGR Delete Kit?

An EGR delete kit is designed to remove or bypass the EGR system, offering various benefits to diesel engine performance and longevity. For 6.7 Cummins engines, these kits come in different configurations, catering to specific needs such as improved power output and reduced maintenance.

Types of EGR Delete Kits for 6.7 Cummins

There are several options available when selecting an EGR delete kit for your 6.7 Cummins engine. These include complete deletion kits that remove all EGR components, as well as tuners that disable EGR function while keeping components intact for potential reinstallation.

Explore the features and benefits of 6.7 Cummins EGR delete kits, including comparisons with Ecodiesel options.


3: Installation Steps and Tips for EGR Delete Kits


  1. Disconnect both batteries' negative cables.
  2. Remove the passenger side inner fender liner.
  3. Drain coolant from the radiator's lower corner (right side).
  4. Take out the intake assembly.
  5. If you face difficulties during disassembly, seek help from a certified diesel performance shop.

Installation Steps:

  1. Remove the EGR's hot side pipe heat shield and disconnect it from the EGR valve and cooler.
  2. Take off the turbo intake horn and PCV hose.
  3. Loosen and remove the bolts securing the turbo intake horn.
  4. Remove the small aluminum coolant line assembly connected to the Y-bridge.
  5. Detach the plastic intercooler pipe from the Y-bridge.
  6. Disconnect the wire harness from the Y-bridge and throttle blade.
  7. Unbolt the AC compressor and release tension from the serpentine belt.
  8. Remove the compressor's bale connector bracket.
  9. Take out the bolts securing the AC compressor.
  10. Remove the bolts holding the Y-bridge to the intake runners.
  11. Remove the heat shield from the shorter EGR hot side pipe.
  12. Disconnect all coolant hoses from the upper EGR valve and remove its bolts.
  13. Install the steel manifold block-off plate onto the exhaust manifold and torque bolts.
  14. Remove the large diameter steel coolant pipes from the thermostat crossover housing.
  15. Install the billet plug with O-ring into the thermostat housing's coolant port.
  16. Disconnect the small coolant line from the turbo to the EGR cooler.
  17. Remove the bolts holding the EGR cooler to the engine and take it out.
  18. Remove the aluminum coolant hardline on the passenger side.
  19. Install the 20" long, 5/8" hose assembly in place of the hardline.
  20. Connect the upper end of the new hose assembly to the heater core hose fitting.
  21. Disconnect the small rubber hoses at the Urea Injector and remove the hose/hardline assembly.
  22. Install the barbed plug into the rubber hose.
  23. Remove the turbocharger and SCR.

Final Steps:

  1. Reinstall the radiator coolant drain plug.
  2. Reinstall the intake assembly.
  3. Reinstall the fender liner.
  4. Start the truck and check for any leaks after idling for some time. You may need to top off coolant once or twice as the system burps air.


Learn about common installation challenges and how to troubleshoot them effectively.

4: Impact of EGR Delete on Engine Performance and Environmental Factors

Effects on Engine Performance

Deleting the EGR system from your 6.7 Cummins engine can lead to noticeable improvements in performance metrics such as horsepower and torque. By eliminating recirculated exhaust gases from entering the intake manifold, the engine can operate more efficiently, resulting in enhanced throttle response and overall power output.

Fuel Efficiency Considerations

Improved combustion efficiency often translates to better fuel economy, as the engine operates more effectively without the EGR system's restrictions. This can be particularly beneficial for drivers looking to optimize their vehicle's fuel usage over long distances.

Explore detailed performance benchmarks and real-world driving scenarios after EGR deletion.

5: Relationship Between EGR Delete and Other Vehicle Systems

Interaction with DPF System

The Diesel Particulate Filter (DPF) system in 6.7 Cummins engines is closely linked to the EGR system in managing emissions. Deleting the EGR system may impact DPF performance and maintenance requirements.

Operational Efficiency of DPF

Without EGR, the DPF may experience reduced soot buildup and regeneration frequency, potentially extending its lifespan. However, proper tuning and monitoring are crucial to ensure the DPF continues to function effectively in emission control.

Discuss strategies for optimizing DPF performance post-EGR deletion.


6: Long-term Considerations and Recommendations for EGR Delete

Maintenance Costs and Longevity

Deleting the EGR system from your 6.7 Cummins engine can lead to reduced maintenance costs over time. By eliminating components prone to clogging and wear, such as the EGR valve and cooler, owners may experience fewer repairs related to emissions control.

Engine Longevity

Improved airflow and reduced carbon buildup can contribute to extended engine life. Regular maintenance checks and adherence to manufacturer guidelines for tuning and servicing are essential to maximize these benefits.

Explore expert tips for maintaining a diesel engine after EGR deletion.


In conclusion, understanding the intricacies of 6.7 Cummins EGR cleaning costs and the option to use an EGR delete kit is crucial for diesel vehicle owners seeking to optimize engine performance and longevity. Whether opting for professional EGR cleaning or installing a delete kit, each approach carries its own set of benefits and considerations. By weighing the costs, performance impacts, and long-term maintenance factors, owners can make informed decisions that align with their vehicle's needs and environmental regulations.

For those ready to take the next step, exploring reputable EGR delete kits and consulting with experienced technicians can provide valuable insights into maximizing vehicle efficiency while maintaining compliance with emissions standards.

Related Article:

1. Pros And Cons Of L5p Duramax Egr Dpf Delete

2. Pros And Cons Of Lml Duramax EGR DPF Delete

3. Pros And Cons Of 6.7 PowerStroke EGR Delete Problems

4. How To Delete EGR 6.7 Cummins

5. Enhance Your Dodge Cummins With An EGR Delete Kit: Boost Performance And Efficiency

6. Ultimate Guide: Deleting EGR On 6.7 Cummins Engine

7. Ultimate Guide: 6.7 Cummins Oil Capacity & Maintenance Tips

8. 6.7L Cummins EGR Delete: Pros And Cons Explained



Q1: Can I delete EGR and keep DPF? 

A1: Yes, it's possible to delete the EGR system while keeping the DPF (Diesel Particulate Filter) intact. Many aftermarket EGR delete kits allow for this configuration, which can enhance engine performance while maintaining emissions compliance.

Q2: Is deleting EGR bad for the engine? 

A2: Deleting the EGR system can improve engine performance and reduce maintenance related to EGR components. However, improper tuning or installation could potentially impact engine reliability and emissions compliance.

Q3: Does blanking EGR affect DPF? 

A3: Blanketing or deleting the EGR system typically does not directly affect the DPF. However, proper tuning and monitoring are crucial to ensure both systems work optimally together to meet emissions standards.

Q4: Does blanking EGR improve performance? 

A4: Yes, blanking or deleting the EGR system can improve engine performance by reducing intake restrictions and optimizing airflow. This can lead to better throttle response and increased power output.

Q5: What happens if you blank the EGR off? 

A5: Blanketing or deleting the EGR system prevents exhaust gases from being recirculated into the engine intake. This reduces intake manifold deposits and can lower engine operating temperatures.

Q6: Is it bad to block off EGR valve? 

A6: Blocking off the EGR valve can improve engine performance and reduce the likelihood of intake system deposits. However, it's essential to ensure proper tuning and compliance with local emissions regulations.

Q7: How does EGR delete affect engine longevity? 

A7: EGR delete can potentially improve engine longevity by reducing the buildup of carbon deposits in the intake and exhaust systems. Regular maintenance and tuning are essential to maximize these benefits.

Q8: Will EGR delete void my vehicle's warranty? 

A8: EGR delete modifications can void portions of the vehicle's warranty, especially if they lead to drivetrain or emissions system issues. It's advisable to consult with a qualified technician or dealership for specific warranty implications.

Q9: Can EGR delete improve fuel economy? 

A9: Yes, EGR delete can improve fuel economy by optimizing engine efficiency and reducing the need for regeneration cycles in diesel particulate filters (DPF). This efficiency gain varies based on driving habits and vehicle conditions.

Q10: How can I ensure EGR delete is done correctly? 

A10: To ensure proper EGR delete installation, consider using reputable delete kits and working with experienced technicians. Verify that the tuning is compatible with your vehicle's engine and emissions system requirements.

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