How to Install EGR Delete on LML Duramax: A Step-by-Step Tutorial

Product: EGR Delete Kit for LML 2011-2016 GMC/Chevy 6.6L Duramax Diesel

Author: Lars - SPETUNER Professional Modification Specialist

Welcome, fellow DIY enthusiasts! If you’re here, you’re probably gearing up to enhance the performance and reliability of your LML Duramax. This guide will walk you through the installation of an EGR Delete Kit step-by-step. Whether you're an experienced modifier or tackling this for the first time, we've got you covered.

Before we dive in, remember that this modification is for off-road use only. Please familiarize yourself with the emissions laws in your region and ensure you’re in compliance before proceeding. Let’s roll up our sleeves and get to work. 

Installation Outline

1. Preparation

Tools and Materials Checklist

To make this process as smooth as possible, gather the following before starting:

Tools:

• Torque wrench
• Ratchet with 8mm, 10mm, 13mm, and 15mm sockets
• Flathead screwdriver
• V-band clamp tool
• Cutting wheel (for stubborn components)
• Coolant draining tool

Supplies:

• Copper anti-seize lubricant
• New coolant (compatible with your engine)
• 5/8 to 3/4 coolant hose adapter
• Replacement coolant hoses

Safety First

• Park your truck on a level surface and secure it with jack stands.
• Disconnect the negative terminals on both batteries to prevent electrical shorts.
• Ensure your workspace is well-lit and ventilated.

Step-by-Step Installation

Step 1: Initial Disassembly

1. Disconnect Battery Terminals:
   Locate the batteries and remove the negative cables from both. Safety is key here!
2. Remove Air Intake Components:
   Detach the intake bridge and air intake pipes. Loosen clamps and remove the connected sensors. This will give you room to work around the engine.

Step 2: Coolant System Drainage

1. Drain Coolant:
   Using a coolant drain tool, carefully drain the coolant into a container. Avoid spills and dispose of old coolant responsibly.
2. Remove Coolant Hoses:
   Loosen the metal clamps securing the hoses and detach them. Use penetrating spray if the connections are stuck.

Step 3: EGR System Removal

1. Detach the EGR Cooler:
   Locate and remove all bolts securing the cooler. Disconnect hoses and sensors attached to the EGR system.
2. Remove the Up Pipe:
   Loosen the bolts connecting the up pipe to the turbo and exhaust manifold. Apply penetrating oil to help with stubborn bolts.

Step 4: Turbo and Exhaust Components

1. Remove the Turbo Heat Shield:
   Unscrew the 8mm or 10mm bolts holding the heat shield in place. If needed, use a cutting wheel to loosen stubborn parts.
2. Disconnect Turbo Lines:
   Carefully detach the oil and coolant lines from the turbo, ensuring the seals remain intact for reinstallation.

Step 5: Installing New Components

1. Install the EGR Blocker Plate:
   Attach the plate where the EGR components were removed. Reuse the factory gaskets for a secure seal.
2. Install the New Up Pipe:
   Align the new up pipe with the turbo and exhaust manifold. Use copper anti-seize on the bolts to prevent them from seizing in the future.
3. Reconnect Coolant Hoses:
   Using a 5/8 to 3/4 adapter, connect the replacement hoses to the coolant system. Double-check for leaks.

Step 6: Reassembly

1. Reinstall the Turbo and Air Intake:
   Secure the turbo and reconnect all detached components, including the intake bridge and sensors.
2. Reattach the Downpipe:
   Position the downpipe and fasten it with a V-band clamp or flange, depending on your model year. Ensure all connections are tight.

Step 7: Testing the System

1. Refill Coolant:
   Add new coolant to the system and allow the engine to reach operating temperature. Top off as needed.
2. Check for Leaks:
   Inspect the system for any leaks in the coolant and exhaust connections. Tighten fittings if necessary.
3. Test Drive:
   Take your truck for a short drive to verify performance and stability. Listen for unusual noises or signs of leaks.
4. After Installation

• Reinspect all bolts, clamps, and hoses to ensure everything is secure.
• Regularly check the EGR blocker plate and up pipe connections to ensure they remain in good condition.
• Remember that this modification is for off-road use only. Operating on public roads may result in fines or legal issues.

Pro Tips from Lars

• Use plenty of penetrating oil on stubborn bolts—patience pays off!
• Take photos as you disassemble components to ensure easy reassembly.
• When in doubt, take a break. This can be a challenging job, but it's worth it.

By following this guide, you’ll unlock your LML Duramax’s full potential while improving reliability and performance. If you encounter any issues, SPETUNER is here to help. Feel free to contact us or explore our website for additional resources.

Happy modding!

FAQs

Q1: What are the benefits of an EGR delete on an LML Duramax?
A1: An EGR delete improves engine reliability by reducing soot buildup, lowering exhaust gas temperatures (EGT), and preventing carbon deposits in the intake manifold. It also enhances fuel efficiency and allows for better performance tuning.

Q2: Can I delete an EGR without deleting the DPF?
A2: No, deleting the EGR typically requires removing the DPF as well. The truck’s emissions system is interconnected, so the ECM must be tuned to function properly without both components.

Q3: What are the disadvantages of an EGR delete?
A3: EGR deletes are illegal for on-road use in many regions, and you may face fines or emissions-related issues during inspections. Additionally, it can void your warranty and potentially increase NOx emissions.

Q4: Do you gain HP from an EGR delete?
A4: Yes, deleting the EGR can result in horsepower gains, especially when paired with proper tuning. By reducing exhaust gas recirculation, the engine breathes better, allowing for improved combustion and power output.

Q5: Is an EGR delete legal for off-road use?
A5: Yes, EGR deletes are legal for vehicles used exclusively for off-road purposes, such as racing or agricultural work. Always verify local regulations before proceeding.

Q6: How much time does it take to install an EGR delete on an LML Duramax?
A6: Installation can take anywhere from 6 to 8 hours, depending on your experience level and whether additional components like the turbo need to be removed.

Q7: Will an EGR delete affect my fuel efficiency?
A7: Yes, an EGR delete often improves fuel efficiency by optimizing engine performance and reducing inefficiencies caused by recirculated exhaust gases.

Q8: Do I need to tune my truck after an EGR delete?
A8: Yes, tuning is essential after an EGR delete. Without tuning, the ECM will trigger error codes and the engine may not operate properly.

Q9: Can an EGR delete cause engine damage?
A9: When installed correctly and tuned properly, an EGR delete does not harm the engine. In fact, it often prolongs engine life by reducing soot and carbon buildup.

Q10: Is an EGR delete reversible?
A10: Yes, an EGR delete can be reversed by reinstalling the original components. However, this can be time-consuming and may require new parts if the originals are damaged.