Duramax v8 engine – wikipedia j gastroenterol impact factor


RPO LB7 (engine code "1") was first introduced in 2001 and continued until early-2004. It is a 32-valve design with high-pressure common-rail direct injection and an experimental composite design cylinder head. The most common issue with the LB7 is injector failure, so common that a special policy bulletin was issued (#04039B). Fuel leaked and entered the crankcase, causing oil dilution. Early on, customers came forward complaining of severe overheating, and in some situations, blown head gaskets. Initially GM denied it was a problem, but after being sued by a consumer group, GM relented and included overheating and blown head gaskets as a warranted item.

The LLY (internally called the 8GF1) (engine code "2") is a 6,599 cc (402.7 cu in) turbocharged engine which debuted in mid-2004 and continued until the end of 2005. It is a 32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads. The LLY was GM’s first attempt to implement emissions requirements on their diesel trucks. To meet this goal, they turned to a newly developed Garrett turbocharger with a variable geometry vane system and installed an EGR Valve. Learning from problems with injectors in the previous LB7 GM changed the valve covers to allow access to the injectors without having to remove the valve covers, saving significant labor costs if injector replacement became necessary.

Second is VIN D. This was introduced in 2006 and continued into 2007 sold only in the "classic" body style. It has an improved engine computer tune that produces increased power and torque over the 2005 LLY version of the motor. First appearance of the Duramax in the Express/Savanna vans. The LBZ is regarded as the best Duramax ever made.

The LMM (engine code "6") debuted part way through 2007 and ended production with the start of the 2011 calendar year and is mated to the 6-speed Allison transmission. The LMM was the only Duramax offered for model years 2008–2010. [3] A version was used in the Trident Iceni. [4] Specifications [ edit ]

The 6.6L Duramax diesel engine (VIN code "L") is used on 2010 interim and 2011 Chevrolet Express and GMC Savana vans and 2011 Chevrolet Silverado and GMC Sierra trucks with RPO ZW9 (chassis cabs or trucks with pickup box delete). The LGH engine is rated at 335 bhp (250 kW) at 3100 rpm and 685 lb⋅ft (929 N⋅m) at 1600 rpm. Similar to the LML this engine also uses a DPF and DEF system to meet emission standards. LML [ edit ]

The 6.6L RPO LML (VIN code "8") is the 2011–2016 version of the Isuzu/GM Duramax V8 diesel engine. It is a further advanced version of the LMM engine with the majority of the changes addressing a required drastic reduction in engine emissions. Some mechanical aspects of the engine, such as piston oil flow design for improved temperature control and oil pump design, were also improved to enhance durability even further.

The LML engine was significantly updated for 2011 to provide improved exhaust emissions that comply with the new federal emission standards for diesel engines, provide better engine rigidity and further noise reduction. New 29,000 PSI piezo injectors, a complete fuel system-hardening to tolerate up to 20% biodiesel mixtures and urea injection (to reduce nitrogen oxides) with a 5.3 gallon urea tank are updating the fuel and emissions systems. This engine has a fuel injector in the exhaust tract, to allow raw fuel injection during the particulate filter recycling routine. The RPO LML engine is rated at 397 horsepower (296 kW) at 3000 rpm and 765 lb⋅ft (1,037 N⋅m) of torque at 1600 rpm. [8] L5P [ edit ]

The L5P duramax is the latest version of the Duramax V8 diesel engine.(engine code Y) Introduced in the 2017 model year it is the most powerful diesel engine GM has produced with 445 hp @ 2,800 rpm and 910 lb-ft @ 1,600 rpm. Design spec performance can exceed 550 bhp @ 3050 rpm and 1050 lb-ft at 1975 rpm. LMK [ edit ]

Although touted as one of the most important new engine concepts by delivering a diesel that is both capable and compact, this engine is not yet commercially launched. The engine project is currently on an indefinite hold. [9] GM planned a 4.5L 72-degree V8 [10] for light-duty applications which would be built at GM’s powertrain facility in Tonawanda, New York after 2009. Designed to fit in the same space as an LS engine, it is expected to produce over 310 bhp (230 kW) and 520 lb⋅ft (705 N⋅m) of torque while delivering 25% better fuel efficiency than a gasoline equivalent. An electronically controlled, 29,000-psi (2,000 bar) common-rail fuel system is also used on the engine with an ability to inject fuel five times per combustion event. [11] It was initially targeted for the Chevy Silverado/GMC Sierra and Hummer H2. [12] Unlike previous Duramax engines, the 4.5-liter is planned to be designed and built entirely by GM without assistance from Isuzu. [13] See also [ edit ]