Why an EGR Delete...
May 07, 2025
How Long Will a Deleted 6.7 Cummins Last?
One of the biggest questions diesel owners have before deleting their 6.7 Cummins is: "How long will my engine last after deleting?"
The answer depends on several factors, including driving habits, maintenance, and tuning choices. Let’s break down what affects a deleted Cummins’ lifespan and how you can maximize it.
Does Deleting a 6.7 Cummins Shorten Engine Life?
Contrary to some myths, properly deleting and tuning a 6.7 Cummins can actually extend its lifespan—if done correctly. Here’s why:
✅ Reduced Carbon Buildup – EGR systems recirculate soot, clogging the engine over time. Deleting eliminates this issue.
✅ Lower Engine Temperatures – EGR and DPF systems increase heat stress; removal reduces thermal wear.
✅ Cleaner Oil & Fuel System – Without soot contamination, oil stays cleaner longer, reducing engine wear.
However, poor tuning, excessive power upgrades, or neglecting maintenance can shorten engine life.
How Many Miles Can a Deleted 6.7 Cummins Last?
With proper care, a deleted 6.7 Cummins can easily surpass 300,000–500,000 miles—some even reach 750,000+ miles. Key factors include:
1. Quality of the Delete & Tune
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A professional-grade delete kit (like our EGR Delete Kit) ensures proper airflow and cooling.
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A well-calibrated tune prevents excessive cylinder pressure and premature wear.
2. Maintenance Habits
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Frequent oil changes (every 5,000–7,500 miles with full synthetic).
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Regular fuel filter replacements (every 15,000 miles).
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Cooling system upkeep (prevents overheating).
3. Driving Style
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Towing heavy loads frequently? Ensure your tune supports it.
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Aggressive racing or excessive high-RPM driving? This can wear the engine faster.
Will Deleting Void My Warranty?
Yes—deleting a 6.7 Cummins will void the factory warranty. If your truck is still under warranty, weigh the pros and cons carefully.
How to Maximize Your Deleted Cummins’ Lifespan
✔ Use a conservative tune (avoid extreme horsepower tunes for daily driving).
✔ Monitor engine vitals (EGTs, boost pressure, coolant temps).
✔ Upgrade supporting mods (better cooling, turbo, and fuel systems if pushing big power).
Final Verdict: A Deleted 6.7 Cummins Can Last Longer—If Done Right
When properly maintained, a deleted 6.7 Cummins can outlast a stock engine thanks to reduced soot, heat, and stress. The key is smart tuning, quality parts, and regular maintenance.
Ready to delete your Cummins? Check out our top-rated:
🔗 6.7 Cummins EGR Delete Kit
Want more power? Explore our 6.7 Cummins Performance Upgrades for maximum reliability!
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