lmm duramax van

Some growing pains existed in GM’s first go-round of equipping the Duramax with a DPF, as many of the units used in LMM applications (’07.5-’10 Silverado and Sierra HDs) were prone to cracking and leaking.To keep the DPF from becoming chock full of particulate matter, a process called regeneration takes place, which effectively incinerates most of the soot buildup within the DPF. 1) It received cast-aluminum heads superior to any other Duramax produced, 2) it was equipped with revised injectors which provided both added power and more complete combustion and 3) it came bolted to the all-new GMT900 platform and was wrapped in a fresh body style.Don’t forget to tune in for Part 5, where we spotlight the LML—the Duramax that brought more robust internals, a higher pressure injection system and additional emissions equipment to the table.It was during the LMM’s tenure that GM produced is 1 millionth Duramax. There are two forms of regeneration: active and passive. Like its competitors, a diesel particulate filter (DPF) system had to be adopted by the Duramax in order to meet Federal emissions regulations in the U.S. The new diesel particulate system required "active regeneration" in order to periodically clean the DPF by means of literally burning the collected material. 261HD Transfer Case; 263HD Transfer Case; NP246 Transfer Case; Lubricants and Sealants ; Tools ; Contact Us ; Videos Specifically, a six-hole nozzle with a 159-degree spray angle on top of the piston was employed, whereas the LBZ injector had used seven-hole, 158-degree nozzle. Its bore of 4.06 in and stroke of 3.9 in also created a displacement of 405 ci.As is the case with most modern diesel engines, emissions-control devices account for the majority of premature failures. The LMM is no different, with its labyrinthine-like exhaust after treatment also contributing to poor fuel economy, diluted engine oil and reduced long-term engine longevity. throttle plate) shown above allows the LMM to do just that. BANKS POWER BIG HOSS INTAKE MANIFOLD 42733 2001-2015 GM 6.6L DURAMAX . 11 GM 3/4- & 1-ton Truck IFS Upgrade Basics However, in GMC and Chevrolet class 4/5 trucks (4500/5500 models) the Duramax LMM was available in either a 300 hp/520 lb-ft or 330 hp/620 lb-ft version. How To Install Dual Thermostat Duramax 6.6l LBZ/LLY/LB7/LMM Its bore of 4.06 in and stroke of 3.9 in also created a displacement of 405 ci. During instances of towing, hauling or spirited driving its services aren’t required. The first step in trouble-shooting a leaking EGR cooler is often noticing that the engine is consuming coolant.The name of the game in meeting particulate matter emission standards is to maintain sufficient heat in the engine. The primary highlight of the LMM is that it met strict EPA mandated emissions requirements for the 2007 model year. Save duramax engine lmm to get e-mail alerts and updates on your eBay Feed. Increased emission regulations began to alter the diesel landscape significantly in 2007. The LMM used a less favorable late and post injection technique in order to introduce raw diesel fuel into the diesel particulate filter, which is necessary to inhibit the high temperatures necessary for regeneration to occur. Duramax History, Lesson 1: LB7 However, in GMC and Chevrolet class 4/5 trucks (4500/5500 models) the Duramax LMM was available in either a 300 hp/520 lb-ft or 330 hp/620 lb-ft version. Search The "9th injector" system, which would be adopted by the current LML Duramax, is considered favorable and eliminated these concerns. The 2500/3500 Van variation of the engine made 250 hp/460 lb-ft of torque and mated to GM's Hydra-Matic 4L85-E four speed automatic transmission instead of the Allison 1000. However, the fuel required to perform an active regeneration cycle (which occurs about once every fillup or roughly every 400 miles traveled) is the primary reason why the LMM-powered trucks took a hit in fuel economy.The active regeneration process is triggered when a pressure difference between the inlet and outlet of the DPF is observed, but you won’t notice any regeneration initiation message on the dash, unless there is a problem. For GM, an updated version of the 6.6L Duramax, RPO code LMM, was all that was in store, whereas Ford and Dodge unveiled completely new power plants (the 6.4L Power Stroke and the 6.7L Cummins, respectively). L What? Turbocharged and intercooled - Garrett GT3788VA variable vane turbocharger (VVT), air-to-air intercooler26,000 psi Bosch high pressure common rail with CP3 injection pump• Diesel Particulate filter (DPF); minimizes particulate emissionsThe LMM offered a slight increase in horsepower (+5) and torque (+10) over the LBZ. $1,798.00 Add to Cart . During active regeneration (commonly required on trucks that idle a lot or aren’t worked hard), the ECM calls for fuel to be injected on the engine’s exhaust stroke. The late and post injection technique, as opposed to the "9th injector" technique, poses the threat of cylinder washing and fuel dilution as a result of raw diesel fuel passing through the cylinder on its journey to the exhaust system. In the aftermarket, cracked pistons remain common thanks to the LMM’s use of the same pistons employed in the LBZ. In April of 2007, engine number 1,000,000 was put on display at DMAX Ltd. headquarters upon final assembly. 2010 was the last model year that the LMM was available, as it was replaced by the more powerful, more efficient LML for the 2011 model year. Though manual transmissions have never been particularly popular with Duramax buyers, there are those that wish the stick shift option would not have disappeared. 5 Fatal Flaws of the Duramax—and How to Fix Them $850.00 Add to Cart . 2007.5-2010 LMM Duramax ... MAGNUM 6.6L GM Light-Duty EGR Cooler 2007 & Up G-Van, Express, & Savana with LMM Duramax engine. With the cylinders below them capable of seeing exhaust gas temperatures hotter than 1,300 degrees F in stock form, the ability to dissipate transitional heat more effectively was a big priority for GM engineers.Moving the same 16.8:1 compression, cast-aluminum pistons up and down in its bores as the LBZ, the LMM’s biggest weak link is also its pistons.

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