6.7 Cummins EGR Delete: 3-4 Hours DIY Step-by-Step Guide

Introduction

We see many 6.7 Cummins owners deal with clogged EGR systems that cause power loss and high repair bills. An EGR delete for 6.7 Cummins removes these problems.

We wrote the 6.7 Cummins EGR delete instruction after we did the job on our own truck. The process felt straightforward once we had the right parts and steps in front of us. We always start with the legal disclaimer — emissions system modifications may be illegal for on-road vehicles in many places.

Wondering how to delete EGR on 6.7 Cummins? Read on to see exactly what you need and learn the complete EGR Delete installation (removing the EGR valve, cooler & crossover tube) and the ECM tune updating process.

Quick Answer: How to Delete EGR on a 6.7 Cummins

Here are quick view of the 6.7 Cummins EGR delete instructions for removing parts and updating tuning. If you are learning how to do EGR delete on a 6.7 Cummins, the process is very easy, but it does take some time.

What does an EGR delete involve on a 6.7 Cummins?

An EGR delete on a 6.7 Cummins involves removal of the valve, cooler, and crossover tube. The process requires basic mechanical tools, coolant handling, and essential ECM tuning. Emissions system modifications may be illegal for on-road vehicles and are intended for off-road, competition, or export use only.

When you install EGR delete kit on 6.7 Cummins, you will:

• Remove the EGR Valve from the intake side
• Take out the cooler and crossover tube that carries exhaust gases
• Install block-off plates on the exhaust and intake manifolds to seal the ports
• Reroute the coolant with a bypass hose so the engine still gets proper flow
• Update ECM tuning to match the new setup.

This change stops hot exhaust gases from mixing back into the intake. Many owners report cleaner oil and fewer intake issues after the delete. The full job combines hardware work with software changes.

Also, these steps work together. Without the plates, we get leaks. Without the coolant reroute the engine may not reach temperature. Without the tune, we see fault codes right away.

What's more, we always start with the legal disclaimer. Emissions system modifications may be illegal for on-road vehicles in many places. We do these steps for off-road, competition, or export use only. Check your local rules before you begin any work.

We learned this the hard way on our first try. We skipped one small sensor plug and the truck went into limp mode. Now we double-check every connector.

How long does it take to delete the EGR on a 6.7 Cummins?

How long does it take to delete a 6.7 Cummins? It typically takes 3-4 hours. The installation process consists of two basic components (hardware removal and tuning).

Hardware removal takes approximately 2-3 hours, depending on how easy or difficult the bolts are to remove and if the area around the installation is easy or tight. We spend extra time on stuck bolts and cleaning old gaskets.

Tuning typically requires a minimum of 1 hour for unlocking the ECM and flashing the new file. However, first-time installations can take longer.

We spent almost 5 hours total on our initial delete because we had to find the right extensions for tight spots and deal with rusty clamps. Experienced hands can finish the hardware in under 3 hours on a clean truck.

Can I delete the EGR on my 6.7 Cummins myself?

How hard is it to delete a 6.7 Cummins? We think intermediate mechanical skill works best for this job.

• Beginner users might run into problems due to bolt tightness. Beginners who feel comfortable with basic socket work and coolant changes can try it.
• Intermediate DIY'ers can manage quite easily. We recommend watching full videos first and having a friend help with heavy parts.
• Professional assistance should be sought if there isn't enough time or tool availability. Shops charge extra for labor, but they handle the tune and test drive for us.

We did ours at home to save money and learn the truck better.

Understanding the Hardware: What Comes in a 6.7 Cummins EGR Delete Kit?

If you are going to install EGR delete kit on 6.7 Cummins, it is important to understand the function and installation of each component.

A good kit gives us block-off plates for the intake and exhaust manifolds. It includes gaskets, O-rings, and all necessary hardware to prevent leaks. Many kits also provide the coolant reroute hose and clamps.

What Is Included

Typically, an EGR delete kit for a 6.7 Cummins engine contains the following components:

• Block-off Plates (to block exhaust & intake passages)
• Gaskets/O-Rings (to seal off exhaust & intake passages at the EGR Valve)
• All Hardware Needed to Install (mounting bolts, nuts, washers)

We check the kit against our model year. Plates and hoses can differ between 2007.5-2009, 2010-2012, 2013-2018, and newer trucks. We always lay out every piece before we start, so we know nothing is missing.

Why do we need a coolant reroute after EGR delete on 6.7 Cummins?

We reroute coolant because the EGR cooler bridges the coolant circuit. We use a bypass hose to keep flow correct so the engine reaches operating temperature safely.

When you remove EGR cooler on 6.7 Cummins, there won't be any more flow in the coolant. Normally, the EGR cooler has connections to the coolant passage. Without it, there is an open loop in the system that must be closed.

A bypass purge hose reconnects the supply and return ports, so coolant flows correctly through the engine.This keeps the engine at safe operating temperature.

Without the reroute, we risk overheating or slow warm-up. The hose is simple to install, but we torque the clamps properly to stop leaks.

Should we keep the throttle valve or install a high-flow intake horn?

We often replace the throttle valve with a high-flow intake horn for better airflow.

We can leave the factory throttle valve in place for a basic budget delete. Or you may simply unplug the throttle valve because it no longer serves a purpose after EGR removal.

However, many of the more popular upgrades have either replaced or eliminated this part with high-flow intake horns. The modification to your 6.7 Cummins engine's throttle valve gives a cleaner look under the hood, improves air flow, and removes restrictions.

We noticed smoother throttle response with the high-flow piece on our truck.

What Tools and Supplies Do We Need for a 6.7 Cummins EGR Delete?

We need a socket set from 8mm to 15mm, deep sockets, wrenches, and hose clamp pliers. A torque wrench helps us tighten everything to spec. We also grab penetrating oil for rusty bolts and shop towels for spills.

When tackling the 6.7 Cummins EGR delete instructions, having the right tools and a clean setup is essential. Installing the EGR delete kit on your 6.7 Cummins becomes much easier when you're prepared, as it helps cut down on errors and speeds things up.

Required Tools:

• 8mm-15mm socket set and deep sockets
• Wrenches
• Hose clamp pliers
• Torque wrench, which helps us tighten everything to spec.

Supplies:

• Fresh coolant
• Drain pan
• Shop towels for spills
• Penetrating oil for stuck bolts
• Gasket scraper

Safety Preparations for the EGR Delete on a 6.7 Cummins

Before removing EGR cooler on a 6.7 Cummins, do the following:

• Disconnect the batteries and allow the engine to cool. Keep away from burns or shocks.
• Drain or capture the coolant into a clean pan so we can reuse it later.
• Remove the engine cover to create space.
• Pull the oil dipstick tube for better access in tight areas.
• Check the model year of the EGR cooler for fitment.

Good preparation will result in a faster and cleaner job. Small differences in bracket locations or hose lengths can surprise us if we grab the wrong kit.

We lay out all kit parts and compare them to the factory pieces we will remove. This prep step saves us time and mistakes later.

Step-by-Step Instructions: How to Delete the EGR on a 6.7 Cummins

We prepare the truck. We clear access. We disconnect sensors. We remove the crossover tube. We remove the EGR valve and cooler. We install block-off plates. We reroute coolant. We install the intake horn. We reassemble and refill.

Here we shows you the EGR Performance EGR delete instructions on how to delete EGR on the 6.7 Cummins in simple steps.

Step 1: Disconnect the battery and remove the valve cover.

Step 2: Remove the dipstick tube for easier access.

Step 3: Unplug EGR valve and all related sensors.

Step 4: Loosen the V band clamps and take out the crossover tube.

Step 5: Carefully unbolt the EGR valve and cooler assembly and set them aside carefully to avoid big coolant spills.

Step 6: Install block-off plates with new gaskets and properly torque them to spec.

Step 7: Install a bypass hose between the factory ports to reroute the coolant. <Also check the 6.7 Cummins CCV reroute delete process>

Step 8: If necessary, install the intake horn or throttle body assembly.

Step 9: Reassemble brackets, reconnect sensors and fill with coolant. Then bleed the system.

We work slowly and take photos of each step on our phone. This helps if we need to reverse anything.

Do You Need a Tune After an EGR Delete on a 6.7 Cummins?

Yes, we need a tune. The ECM expects the EGR system to work. Without new tuning, we get check engine lights and limp mode. The tune tells the computer to ignore the missing parts and adjust the fuel and air strategy.

Every set of 6.7 Cummins EGR delete instructions comes with tuning included. If you're curious about how to do an EGR delete on a 6.7 Cummins, keep in mind that tuning is essential for the engine to run smoothly.

Why the ECM Must Be Updated

Here are the reasons why you should update your ECM after eliminating the EGR valve components:

• To prevent your 'check engine light' (CEL)
• To prevent your vehicle from going into 'limp mode.'
• To ensure your engine runs correctly

What Happens Without Tuning

When you remove the EGR cooler on a 6.7 Cummins without any tuning, it can cause several issues:

• Fault codes will be stored.
• You may have drivability issues.
• You may have limited engine performance. The truck may feel sluggish or enter reduced power mode.

The Benefits of Tuning

Proper tuning of your engine improves the overall performance of your engine, including;

• Proper airflow through your engine and intake system
• Improved throttle response
• Cleaner and more simplified operation of your engine.

Read the best tuner for 6.7 Cummins comparison here.

We use a quality tuner that matches our exact truck year and other mods. We flash the tune after hardware is complete and before the first test drive.

What Common Problems Happen During a 6.7 Cummins EGR Delete?

We deal with stuck V-band clamps and bolts. We use heat or penetrating oil. We reach hard bolts with swivel sockets. After install we check for coolant leaks and CEL.

The following pro tips and EGR Performance EGR delete instructions help you avoid common installation problems.

However, expect a few basic challenges during the process.

Hardware Issues

• Using penetrating oil or a light heat source can help to loosen the stuck v-band clamp or the bolt.
• Using a swivel socket and an extension could provide easier access to your hard-to-reach bolts.

Post-Install Troubleshooting

• Make sure to check all of your connections for coolant leaks following your first heat cycle.
• Watch for check engine lights (CEL) to avoid missed sensor plugs or tuning issues.

We had one small leak on our first job because we did not torque a clamp enough. A quick re-tightening fixed it.

What Long-Term Effects Come After EGR Delete on 6.7 Cummins?

We get cleaner intake and oil with less soot. We monitor the bypass hose for wear. We check block-off plate bolts after 500 miles. We keep the software updated.

Read the benefits of deleting a 6.7 Cummins engine. Even after you install an EGR delete kit on a 6.7 Cummins, maintenance remains important.

Positive Impacts

By deleting the EGR system and eliminating the EGR system's function, there is reduced soot build-up in the engine. Therefore, the following occurs:

• Intake manifolds stay cleaner and less soot in the oil.
• Engine oil remains cleaner.
• You enjoy an extended life for your engine oil, which can extend oil change intervals.
• The engine bay looks tidier without the bulky cooler.

Routine Maintenance

• Regularly monitor coolant levels and inspect the bypass hose for wear or leaks.
• Re-torque block-off plate bolts after the first 500 miles of operation, because vibration can loosen them.
• Keep the tuning software up to date to ensure stable vehicle operation.

FAQs

What parts are removed during an EGR delete?

EGR valve, EGR cooler, and crossover tube. They are replaced with block-off plates and rerouted hoses. We also often unplug or remove the throttle valve. These pieces no longer serve a function after the delete.

What happens if I delete the EGR but not the DPF?

The engine may still run, but restrictions and soot remain. You may still face DPF regeneration cycles and possible codes. Many of us do a full delete that includes DPF for best results. Tuning may still be required.

Will an EGR delete cause a check engine light?

Yes, without proper tuning, a CEL and fault codes will appear, because ECM sees that the EGR system is gone. A good tune turns off the monitors and clears the codes.

Is deleting EGR on a 6.7 Cummins legal?

No. Deleting an EGR is considered illegal for use on the road in most states. It's only meant for off-road, competition, or export use only. We always check local laws.

Can you leave the throttle valve in place after the EGR delete?

No. You can keep your throttle body after doing this. However, many people unplug it or replace it with a high-flow horn to remove restrictions and get more efficient airflow.

How much does it cost to delete the EGR on a 6.7 Cummins?

The cost of deleting an EGR differs widely. A basic EGR delete kit costs $300 to $500. Tuning adds another $300 to $800, depending on the device and custom files. Total DIY cost often stays under $1,000. Shop installs push the price higher with labor.

Can I pass emissions or smog with an EGR?deleted 6.7 Cummins?

No, if you delete your EGR, then you will most likely fail emissions testing. The truck will fail visual or OBD checks because the EGR system is missing.

Will an EGR delete improve fuel mileage on a 6.7 Cummins?

Yes, but the degree to which you will have an increase in your fuel economy may vary based on your load, terrain and tuning. Many owners see 1-3 MPG gains depending on driving style and other mods. We noticed about 2 MPG better on highway trips after our delete and tune.

Conclusion: Is an EGR Delete on a 6.7 Cummins a DIY Job?

The 6.7 Cummins EGR delete instructions make it clear that the task involves both hardware and software components working together for optimal results.

You'll need to eliminate the EGR valve, cooler, and crossover tube, then put in block-off plates, reroute the coolant, and tweak the ECM tuning. If you're experienced DIYers and figuring out how to do an EGR delete on a 6.7 Cummins, it's definitely manageable with the right tools and a little patience.

Don't forget that proper tuning and checking for leaks after the work are super important. After you finish, take the truck for a road test, monitor the temperatures, check your local rules and ensure you're meeting all compliance standards.

For the best results and support, we choose EGR Performance as our go-to solution because their EGR delete kits for 6.7 Cummins and guidance make the process simple and reliable.

More Reading

• 6.7L Cummins Problems
• 6.7L Cummins Maintenance
• 6.7L Turbo Diesel for Heavy Duty Pickups