Never … Press J to jump to the feed. I feel like it is loud so I just go easy on it in neighborhoods. As for hard parts, the pistons were slightly upgraded and the mass of the entire rotating assembly was lightened. Repeated NOx sensor prompted GM to make changes to the sensors and issue a 10 year, 110,000 mile warranty on the updated sensor. The LMM was the only Duramax offered for model years 2007–2010. The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. If you are constantly driving in heavy traffic, idling excessively, or towing heavy loads you will need to follow GM’s Severe maintenance schedule. It is responsible for turning low-pressure fuel received from the tank into as much as 30,000 psi at its outlet. Over the engine’s lifespan it has gone through 6 different engine variations: LB7, LLY, LBZ, LMM, LML, and L5P. By far, the predominant re-occurring problem was failure of the NOx sensors (commonly P20EE/P207F trouble diagnostic codes). • If the DEF system detects that it requires service, a "SERVICE EXHAUST FLUID SYSTEM" notification will be displayed on the instrument panel. The LML was replaced for the 2017 model year by the next generation Duramax L5P. These Denso G4S Gen III injectors can support up to seven fuel delivery events per combustion cycle. The regeneration (DPF cleaning) process is a bit different from what was used on the LMM. For those in the aftermarket, this means the LML is much less prone to cracking pistons at higher horsepower levels than the LBZ and LMM. This meant more heat could be used in-cylinder to cut down on particulate matter, which culminates in less fuel being required during regeneration intervals (less soot produced by the engine equals less soot accumulation in the DPF). K&N air intake, 4” exhaust. Have always wanted a diesel truck, loved the longevity and power. CLICK HERE to purchase our LML CP4 High Pressure Fuel Pump Failure Kit. Your first start will be is getting a cp3 conversion to take the place of the LML cp4. LBZ Duramax Specifications. With that said, Ive only had 1500 series gm trucks. It is unknown how many trucks are affected and what the cut-off is for those protected by the updated warranty - if you are experiencing issues, we suggest pressing the issue with your local dealership. Shift on the fly 11-16 with stock exhaust: Supply, 35HP, 65HP, 100HP, 120HP. Travis Turner discovered there wasn’t anyone in his area working on diesels, or anyone who really knew much about them, so he set out to change that. The LML Duramax is equipped with a SCR system that requires the use of DEF (diesel exhaust fluid). Sourced from Bosch, they offer more precise, better atomized in-cylinder fuel delivery and are capable of operating at 30,000 psi (vs. 26,000 psi on the LMM that preceded it). Source: GM Powertrain Division, www.gmpowertrain.com. The L5P Duramax’s injectors are solenoid injectors, instead of piezoelectric ones like those that are found on the LML Duramax. As such, this crankcase is now used as the foundation in … However, this technology actually allows for an advantageous engine calibration to be executed, reducing the duty cycle of DPF regenerations and providing significant improvements in fuel economy. The result eliminated cylinder washing concerns and permitted the use of up to B20 biodiesel. Chevrolet/GMC- 2011-2016 LML Duramax – Includes Song Files. Posted by 1 year ago. So i have recently got back into the Duramax game (about 4 years ago ) from having a slightly modified LB7. The LML is a further improvement upon the LMM. GM introduced the LMM Duramax in 2007.5 that included a new DPF (diesel particular filter) and body style. Get Efi Live. Engine Design: 6.6L 90-Degree V8 Turbocharged Diesel. However, they weigh less. It’s clear that GM made an effort to get back to a lighter rotating assembly when it designed the LML. The fifth generation common-rail V8 was given the RPO code LML. DuramaxHub.com is not affiliated with or endorsed by DMAX, Isuzu, or any division of General Motors. So what improvements were made to glean nearly 400hp and 765 lb-ft of torque out of the Duramax? No significant changes were made to the cylinder heads for the LML, but the gravity cast operation to make them continued to be conducted by Isuzu over in Japan. 6.6 Duramax: Performance … Manufactured Years: 2006-2007. That's my biggest fear is getting something that will … A concerned Ford quickly acted to increase the Power Stroke's available horsepower and torque rating, issuing a free performance upgrade to owners which would re-calibrate the engine to the tune of 400 horsepower and 800 lb-ft. Aluminum cylinder heads, cast iron engine block, 300 psi (minimum compression test pressure), Turbocharged and intercooled - Garrett GT3788VA variable vane turbocharger (VVT), air-to-air intercooler, Direct injection, 2000 bar (~30,000 psi) Bosch high pressure common rail w/ CP4 injection pump and Piezo injectors, OHV (overhead valve), 4 valves per cylinder, mechanical roller lifters, Ultra low sulfur diesel (ULSD) or max B20 biodiesel blend, 6.6L Duramax LML horsepower & torque (Silverado, Sierra) Transmission: 6-Speed Auto Allison 1000 Transmission. Many of these emissions devices are problematic in LML model years (2011-2012). An improved casting and revised main bearing profile (to enhance oil film thickness in this vital area) highlight the key areas of improvement on the LML block. Duramax LML (2011-2016) ... but then the diesel wars began and the LML languished at the bottom of the numbers heap for a few years. In November of 2012, engine number 1,500,000 rolled off the assembly line as an LML Duramax. GM only make 6.6L LML Duramax engines from 2011 to 2016. We've received reports of similar problems with some 2012 MY pickups (all of which were repaired under warranty), but with nowhere near the frequency of 2011 MY engines. Many 2011 model year Duramax LMLs endured ongoing reliability problems with the SCR and DEF systems, which included DEF sensor, NOx sensor, and DEF pump failures in addition to problems with exhaust fluid freezing in cold weather. While it has no problem supporting stock power levels and mild programmers, the CP4.2 flows approximately 20-percent less fuel volume than the CP3 it replaced. We invite you to get behind the wheel with us, it's certain to be an interesting drive. Also incl… every 5,000 miles (under normal operating conditions). I love my LML and is has served me solid for 6 years and 230k miles BESIDES emissions failure which are gone. Find out what went into this diesel build. • If the DEF fluid level is depleted, an "EXHAUST FLUID EMPTY" notification will be displayed on the instrument panel. document.write(year); Active regeneration programming cleans the DPF periodically (estimated regen period every 700 miles, 300 miles less then previous systems, under normal operating conditions) by injecting diesel fuel into the exhaust stream via a "downstream injector", completely burning off soot captured in the DPF. But I have heard while looking into diesels that there were years (for all brands, ford and dodge) that were horrible. Built trans. Engine related discussion ONLY. Directly supporting the piezoelectric injectors is the Bosch CP4.2 injection pump. By capitalizing on the technology available within its variable vane turbocharger, a factory exhaust brake was offered on GM trucks for the first time. Copyright © 2009 - The DEF tank is located roughly beneath the front passenger with several inches of the tank vulnerably exposed beneath the level of the body. These injectors are less complex, but because of their advanced technology, they offer performance similar to piezo-style units. Called an exhaust brake but technically a turbo brake, this new technology debuted at the perfect time, as GM had just treated its ‘11 model HDs to a fully boxed frame, larger leaf springs, a stouter front suspension and fittingly increased its trucks’ towing and hauling capacities. Imagine driving a brand new Duramax with twice the factory horsepower. The LML Duramax was released for 2011 model General Motors & Chevrolet HD trucks. Now, 14 years after DMAX Ltd. was created, more than 1.5 million Duramax engines have been built. The LML Duramax was the power house for almost six years(2011-2016) when the L5P was released in 2017. Block / Head: Cast gray iron / Cast aluminum It receives its fuel from the aforementioned CP4.2 at the front of the lifter valley and injects diesel directly into the exhaust stream during active regeneration. Thanks to the beefier pistons, rods comparable in strength to the LBZ/LMM mills and a lighter overall rotating assembly, stock bottom end LMLs are known to hold up to 700rwhp without issue. My LML is straight piped. Ran it for 2 years on Sport Economy (pretty peppy) and just added a lift pump about a month ago. Before you invest a decent amount of money into a tuner, make sure it will fit your vehicle. The fifth generation common-rail V8 was given the RPO code LML. • Exhaust gas recirculation (EGR) with EGR cooler. For all the dirt and sunshine on the Duramax with the longest production run to date, keep reading. User account menu. This gives the L5P lower … With increased horsepower comes increased heat and cooling demands. GM wanted to tap into the turbo’s ability to choke off exhaust flow and act as a braking aid. The Duramax 6.6L V8 turbo-diesel engine is nearing its 20th year of production, after debuting in 2001. No V8s Allowed, Ford EcoBoost Turbo Swap Project Ideas: Truck & Van Edition, The History Of The Oldsmobile 455: GM's 'Other' Big Block Muscle Car Monster, 500HP On A Budget: 7.3L Power Stroke Edition, 5 Weird Classic 4x4 Cars You Can Actually Take Off-Road, Sign up for more restomod content to add horsepower to your inbox. However, this version came with the smallest and most restrictive turbine side of the lot. Give your engine the fueling it needs with a dual pump kit from ATS! ZF650 Manual Transmission. Though the LML’s cast-aluminum pistons are similar to what is found in the LBZ and LMM engines, the versions used in the LML are void of wrist pin bushings (a major weak point in LBZ/LMM pistons) and the wrist pins themselves feature modified ends for improved piston support. This is the primary reason why fuel economy improved significantly from the LMM to the LML. The LML Duramax was released for 2011 model General Motors & Chevrolet HD trucks. At 1,130 g apiece, they’re even lighter than the rods used in the LB7. Press question mark to learn the rest of the keyboard shortcuts. DuramaxHub.com, all rights reserved. A version was used in the Trident Iceni. • Diesel particulate filter (DPF) nearly eliminates emissions of diesel soot. https://www.enthuzst.com _ Find me on Instagram! Driving Line® Accelerating Automotive Passion™ by providing a fresh angle of what fuels us. He started Pure Addiction Diesel Performance in 2013 and has been building diesel trucks and engines ever since, just like this 6.6L LML Duramax that puts out 1,200 hp! On both stock and modified engines, the CP4.2 is highly intolerant of fuel contaminants or any lack of lubrication. Live lorry diagnostics and also troubleshooting. 2016 LML with about 72k on it. In order to meet ever-increasing emission standards and keep up with the Joneses (at the time, Ford’s upcoming 6.7L Power Stroke), GM amended the Duramax once more for the 2011 model year. Recognizing that every individual's motoring journey is unique, we seek to give form to both untold as well as celebrated facets of the automotive world. The Duramax … Get a modded fleece cp3 pump 10mm 13mm. The factory CP4 injection pump found on the LML Duramax cannot support any fueling above stock. Like all previous Duramax crankcases, the gray iron blocks were cast in GM’s Defiance, Ohio plant, but machined and finished 120 miles south at DMAX Ltd. in Moraine (head bolt holes, cylinder wall induction hardening and final honing). Although emissions are necessary on diesel trucks today, they frequently cause issues, especially when they are first released. Put a fass 150 lift pump on. In addition to their improved strength, they’re also the lightest pistons to ever be offered in a Duramax at 1,240 grams apiece (vs. 1,272 g on the LB7/LLY and 1,349 g on the LBZ/LMM). 18.7M views. The latest version of the 6.6L Duramax requires advanced emissions equipment, including the use of diesel exhaust fluid injection, to reduce nitrogen oxide emission levels by 63 percent over LMM powered trucks. Duramax History, Lesson 4: LMM. The height required to access the under-hood mounted DEF fill as well as the corrosive nature of DEF have been the source of concerns - a full-size, one ton, four wheel drive pickup is relatively tall and ease-of-access is more or less dependent on a person's height. BrennanK Super Moderator. The LML is said to have been engineered using 60% newly designed components not carried over from a previous generation Duramax. In order to meet ever-increasing emission standards and keep up with the Joneses (at the time, Ford’s upcoming 6.7L Power Stroke), GM amended the Duramax once more for the 2011 model year. This is opposed to the previous generation's (LML) late/post injection technique. A variant of the variable vane turbo that’d been used since the LLY (’04.5 model year), the Garrett GT3788VA VVT, was responsible for forcing air into the LML. Power Stroke Products Performance Valve Spring Set 01-19 6.6L GM Duramax … Upon restart, the truck will be speed limited to 55 mph. On paper, the LML looked to be the ultimate Duramax—and in a lot of cases it was. The latest version of the 6.6L Duramax requires advanced emissions equipment, including the use of diesel exhaust fluid injection, to reduce nitrogen oxide emission levels by 63 percent over LMM powered trucks. Been very happy with it. year=now.getFullYear(); Engine will enter into a limp-mode if DEF tank is empty. The frequency at which you will need to complete maintenance on your LML Duramax vary greatly. Top Contributors this Month … On the LML, a ninth fuel injector is located in front of the diesel oxidation catalyst (DOC) in the turbo downpipe. This allows the LML to exceed currently mandated federal emissions requirements and potentially meet future requirements as well. While the LML seemed to be the “best” duramax to date there has been a serious disturbance since the release of the L5P. Check Out Our Current Diesel Truck Giveaway! This allows the LML to exceed currently mandated federal emissions requirements and … Thanks to a host of high quality, well-refined products being offered throughout the diesel aftermarket, it’s not hard to get a 2011-2015 LML Duramax-powered truck up to speed in a hurry. DEF is injected into the exhaust stream where a chemical reaction occurs that reduces NOx emissions. Vin Identification: The addition of a lift pump has been known to prolong its lifespan, but many Duramax gurus still consider the CP4.2 a ticking time bomb. December 17, 2018; Story By Mike McGlothlin; Increased emission regulations began to alter the diesel landscape significantly in 2007. LML: Significant Bottom End Improvements. I would say yes most def a CP3 swap would make me feel better but I love it. Join Community Forum Staff View All D.Camilleri Super Moderator. Performance may also suffer when the truck enters this mode. After 200 miles of driving with poor quality DEF, the truck will be speed limited to 55 mph. Duramax Maintenance Schedule & Service Information. Shot in the dark but I’ve gotten some good help from here before. A DEF tank will need to be filled approx. Subsequent warnings will follow. The initial engine was produced in Moraine, Ohio, on July 17, 2000. Close. Chevrolet Introduces 2021 Silverado HD Carhartt Special Edition, Built Like an Anvil: How to Piece Together an Indestructible Duramax, Yes, I would like to receive emails from Nitto Tire and Driving Line, I’d like to receive Driving Line’s twice-monthly eNewsletter, Sign me up for a quarterly digital magazine subscription, OHV, four valves per cylinder, single cam, Bosch high-pressure common-rail, direct injection, Cast-aluminum with six 14mm diameter head bolts per cylinder (with sharing). Emissions devices are much more reliable in post-2012 trucks. I told myself i was not going to delete the LML and leave it stock but i think we all know how that goes. DEF is not particularly costly and owners incur noticeable fuel savings even while factoring in the cost of exhaust fluid. The DEF tank is approximately 5 gallons (18.9 liters). In 2011, federal emissions regulations had tightened, so additional measures had to be taken to keep the Duramax compliant, so the LML was the first to be equipped with Selective Catalyst Reduction (or SCR), a system which used a urea-based exhaust fluid to break down harmful nitrogen oxides. Most of the changes are to the emissions system, however there are a few mechanical changes. 6.6 Duramax: LML. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. Mobile application that interacts flawlessly with your car. Change on the fly 11-16 with removed race exhaust: 30HP, 60HP, 120HP, 150HP, 200HP (Calls for a lift pump upgrade). • EGR cooler bypass to help eliminate soot deposits in the EGR cooler/system, which could potentially cause engine problems. Specifications. Unlike the CP3 before it, the CP4.2 is precisely timed to both the camshaft and crankshaft position. I did the EGR cooler delete (it's a pain in the ass), 4 inch straight pipe with a AutoCal tuner from MotorOps. That year, Ford, Dodge and GM all released engines designed to meet the new particulate matter (PM) and nitrogen oxide (NOx) limits mandated by the Environmental Protection Agency. vstech Super Moderator. What was the reason for the restriction? The Duramax LML introduced the "9th injector" system in order to supply fuel to the DPF during regeneration. In order to add DEF to the tank, the driver must access the fill spout located against the passenger side firewall (under the hood). I got a good one I think. Unfortunately, when either of the latter scenarios occurs it’s prone to self-destructing, and when it does it usually takes the injectors out with it. By injecting diesel exhaust fluid (DEF), a mixture consisting of 32.5-percent urea and 67.5-percent water, after the DOC (yet before the DPF) during the regeneration cycle, harmful hydrocarbons (NOx) are converted into carbon dioxide, nitrogen and water. 68stg2r single charger Looking to buy a new truck. Also Includes: Datalogging.