Welcome to our guide for the LML Duramax EGR delete!
The aim of this guide is to compare the best ways of removing the EGR valve and cooler, which are part of the factory emissions system on your Duramax.
Speaking of emissions, the EGR removal goes hand in hand with deleting the DPF, and a lot of lml owners go for installing both kits at the same time in order to eliminate both of the failure prone emissions systems at once.
It’s a great way to kickstart your truck’s performance and efficiency. Let’s take a look at some of the benefits.
Benefits of an EGR Delete
The main benefit of removing the EGR system is that hot and sooty exhaust gasses will no longer be fed back into your intake, which has always been a problem when dealing with diesel engine longevity and efficiency.
This translates into lower intake temps. Your turbo will spool up faster and heat up your exhaust less, which means lower EGT’s. Your coolant will also be able to recirculate much faster, which means lower coolant temps.
You can expect to see an increase of a few MPG and HP after blocking off or removing the EGR system.
Duramax LML EGR Delete Kit
When putting together the parts for your EGR delete, you’ll have to consider which route you want to take with the kind of kit that you get. Basically, there’s an easier way to remove the EGR that takes about 3-6 hours to install, or there’s the full delete option that takes longer.
At the bare minimum, when removing the EGR on the LML you’re going to need some blockoff plates, hoses for rerouting the coolant and a tuner to edit the ECM.
If you don’t already have a tuner, take a look at the best options for the LML.
Once you have a tuner, the only other parts you’ll need for the basic EGR delete option are the block off plates and coolant lines, which are often sold in kits like these:
EGR/Cooler Delete Kit Options
- LML EGR Delete Kit
Ebay.com
2011-2016 GM 6.6L Duramax LML EGR Delete Kit
Increases off the line torque and horse power. Completely replaces/removes the entire EGR system.
Enjoy quicker turbo spool and lower EGTs along with faster re-circulation of the coolant resulting in lower coolant temps. An EGR Delete capable race tuner is required in conjunction with this kit.
Installation Instructions
Click Here for directions on how to do the install for the block off plate and cooler removal.
If you’re doing it the easier way, you can skip the steps where you unbolt the downpipe and up-pipe. Instead, you simply install the up-pipe block off plate and keep the EGR portion of the up-pipe intact.
Full LML EGR Delete Kit
While the regular easier EGR delete is great for most people and will be sure to give excellent results, there are also those of us who are looking for a way to completely remove any unnecessary crapola from under our hoods.
This is where the full EGR delete kit parts package comes into play for the LML.
Be warned, doing it this this way requires a lot more work, but it’s the only way to go when you are trying to get the most out of your truck.
In addition to the block off plates, you’ll also want to get the following two parts in order to remove anything and everything associated with the EGR system.
EGR Delete Up-Pipe
-
Bolt On Passenger Side Up-Pipe w/ Gaskets Fit For LB7 LLY LBZ LMM LML 6.6L Sliver
as of November 20, 2019 6:35 amFeatures
- High performance bellow
- Laser cut flanges
- Drop EGT's
- Add horsepower
- Direct bolt-on installation
Amazon.com
LML Duramax Down Pipe
-
Jamo Performance Exhaust CDP03 - 11-14 3" GM Downpipe
as of November 20, 2019 6:35 amFeatures
- Fits LML Duramax. (non 3 bolt)
- 409 Stainless Steel Mandrel bent tubing with thermal coat & heat wrapp.
- Reduced EGT's and improved throttle response.
- Maximum air flow.
- for race use only under limited to closed and open course racing that is formally sanctioned by a recognized racing organization.
More performance parts to consider
If you’re tearing your truck down far enough to do the full delete, there are some parts in the way that would also be good candidates for upgrading while you’re in there.
LML Duramax Cold Air Intake
aFe Power 51-74006-1 Momentum HD Performance Intake System (Dry, 3-Layer Filter)
Features
- Outflows the factory intake by up to 52%. Produces an additional 22 horsepower and 57 lbs. x ft. torque max gains
- 3-Layer non-oiled, washable synthetic media for the perfect balance of performance, protection and convenience
- High quality one-piece housing with auxiliary air scoop
- Unique (Patent Pending) filter-to-housing interface for easy installation
Conclusion
Hopefully this guide has given you a better idea of how to remove the EGR system on your LML.
If you have any questions or comments, be sure to drop us a line below!
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What setting is this set on when the coal rolls?
I was wondering if on the lower settings if you have video? I need as little smoke coal as possible. Not worried with having high hp. Love truck power now a low setting is fine.
I drag a white enclosed trailer with business logo on it and my truck to and it’s lifted. I don’t need to smoke low cars at red lights. Not good with my business logos everywhere.
Thank you for your help.
Lester
Hey Lester, if you’re just looking to delete your truck and aren’t worried about the high HP settings then the lower HP delete tunes won’t really produce any noticeable smoke. The tunes that come pre-loaded on the recommended tuners are pretty clean and are mainly designed to make your truck run better without the emissions junk.
It’s only when you start to add in pre-boost fuel in a custom tune that you will start to get the extra smoke.
Thank you. I ordered efi live Stock/&stock with deletes/50/75/100 settings
Flo Pro cat and dpf delete and Sinister egr delete it cam in couple days ago. Waiting to clear my lift in my shop of a customer project so I can do my exhaust on lift.
So I will set at 50 and call it a day.
Will let you know how it goes in next week. Thanks for your reply
No problem at all Lester. Would be glad to hear your opinion of how your truck feels after installing the deletes!
In case of sale or state adoption of emissions checks is it possible to return the tune and hardware to stock after all of these steps?
Yes you can return the tune to stock and replace your factory parts. I always recommend that you save your original parts for these scenarios.
So I have a 2011 duramax and I just had a problem with my egr I can’t go over 55 I took it they said it was 2400 dollars to fix it and I want to delete it instead of paying 2400 because I was eventually going to delete it anyways but I’m new with diesels and was wondering what I need to delete the egr and not worry about it I just ordered my exhaust and H&S minimax but what else do I need to delete my egr do I can get it running good again?
Hey Luis, the mini maxx will take care of the EGR codes for you so you could run with it just disabled in the computer, however I strongly recommend removing the EGR and cooler to make sure that you don’t have issues from those parts failing.
All you need is a kit like this one: https://ebay.to/2HbIRgv to block off the EGR ports and reroute the coolant lines after the EGR cooler is removed.
Are there any down sides to removing the EGR only and leaving the other parts of the emission system alone? Will the particle filter reliably operate without the benefit of the EGR ahead of it?
I would not recommend it, not having the EGR operating can cause the DPF downstream of it to clog up sooner.
Okay thank you when I put the exhaust on do I just clear the dpf on the mini Maxx?