This article relies largely or entirely on a single source .(August 2022) |
General Motors L3B engine | |
---|---|
Overview | |
Manufacturer | General Motors |
Production | 2018–present |
Layout | |
Configuration | Inline-4 |
Displacement | 2.7 L; 166.4 cu in (2,727 cc) |
Cylinder bore | 92.25 mm (3.63 in) |
Piston stroke | 102 mm (4.02 in) |
Cylinder block material | 380 T5 Cast Aluminum |
Cylinder head material | 356 T5 Cast Aluminum |
Valvetrain | DOHC 4 valves/cyl with VVT and VVL |
Compression ratio | 10.0:1 |
RPM range | |
Max. engine speed | 6100 RPM |
Combustion | |
Turbocharger | Single BorgWarner Dual-Volute w/ electrically actuated wastegate |
Fuel system | Gasoline direct injection |
Fuel type | Gasoline |
Oil system | Wet sump |
Cooling system | Water cooled |
Output | |
Power output | 237–325 hp (177–242 kW) |
Torque output | 259–430 lb⋅ft (351–583 N⋅m) |
Emissions | |
Emissions target standard | Tier III, Bin 50 |
Emissions control systems | Three-way catalytic converter, wide-band heated oxygen sensor |
The GM L3B engine is a turbocharged four-cylinder gasoline engine designed by General Motors. It is an undersquare aluminum DOHC inline-four displacing 2.7 liters (165 cid) and tuned for strong low-end torque.
In addition to GM's active fuel management, start-stop system, and variable valve timing, which are already featured on GM's other full-size pickup truck engines, this engine also features GM's Intake Valve Lift Control which has 3 different intake cam profiles that are electromagnetically actuated to provide improved fuel economy and performance at a wider range of operating conditions. [1]
The BorgWarner developed turbo can produce up to 27 psi (1.9 bar) of boost thanks in part to its unique dual volute turbine housing and an electrically actuated wastegate. Instead of two side-by-side exhaust passages like on a regular twin-scroll turbocharger, in this design the two exhaust passages are concentric and allow for better use of the exhaust pulse energy. [1]
The L3B was first used in the Chevrolet Silverado and GMC Sierra, with an output of 310 hp (231 kW) at 5600 RPM and 348 lb⋅ft (472 N⋅m) at 1500 RPM. With the unveiling of the 2022 model year Silverado, GM announced a significant revision that stiffened and strengthened the engine allowing for a GM-estimated increased maximum torque rating of 430 lb⋅ft (583 N⋅m) while also improving noise, vibration, and harshness (NVH). [1] Parts are cast at Bedford Casting Operations in Indiana. [2] Assembly is at Spring Hill Manufacturing, Tennessee, USA. [3] The L3B is the successor to the 3.6L V6 LGX, 3.6L V6 LGZ, and 4.3L V6 LV3 engines. [3]
For 2025 the L3B is used in the redesigned Buick Enclave. [4]
The engine is the first GM truck engine to feature an active thermal management system. This system consists of an electrically driven water pump and a 3-way rotary valve which allows the engine to maintain proper operating temperatures and quicker warm-ups. Also, a continuously variable oil pump helps to lower parasitic losses as well as providing proper lubrication and cooling to the engine, especially under high-load conditions. [1] The Active Fuel Management system can shutdown the middle two cylinders under low-power conditions. [2]
Cylinder liners are spun nodular iron. [2]
The low-output work truck variant runs 10 psi of boost, the 390 lb⋅ft variant runs 20 psi, and the 430 lb⋅ft variant runs 27 psi. [2]
Year(s) | Model | Power | Torque | Notes |
---|---|---|---|---|
2019–2021 | Chevrolet Silverado and GMC Sierra 1500 | 231 kW (310 hp) @ 5600 RPM | 348 lb⋅ft (472 N⋅m) @ 1500 RPM | |
2022–present | 231 kW (310 hp) @ 5600 RPM | 430 lb⋅ft (583 N⋅m) @ 3000 RPM | TurboMax name | |
2020–present | Cadillac CT4 | 231 kW (310 hp) @ 5500 RPM | 350 lb⋅ft (475 N⋅m) @ 1500 RPM | |
2020–present | Cadillac CT4-V | 242 kW (325 hp) @ 5500 RPM | 380 lb⋅ft (515 N⋅m) @ 2000 RPM | |
2023–2024 | Chevrolet Colorado | 177 kW (237 hp) @ 5600 RPM | 259 lb⋅ft (351 N⋅m) @ 3000 RPM | detuned with different components, RPO code L2R |
2023–present | 231 kW (310 hp) @ 5600 RPM | 390 lb⋅ft (529 N⋅m) @ 2000 RPM | ||
2023–present | Chevrolet Colorado and GMC Canyon | 231 kW (310 hp) @ 5600 RPM | 430 lb⋅ft (583 N⋅m) @ 3000 RPM | |
2024–present | Chevrolet Tahoe and GMC Yukon | 223 kW (300 hp) @ 5500 RPM | 369 lb⋅ft (500 N⋅m) @ 2000 RPM | TurboMax name, Mainland China market only |
Year(s) | Model | Power | Torque | Dyno Chart |
---|---|---|---|---|
2024–present | Chevrolet Traverse | 328 hp (245 kW) @ rpm | 326 lb⋅ft (442 N⋅m) @ rpm | |
GMC Acadia | ||||
2025-present | Buick Enclave |
The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1.2 and 2.5 litres. Confusingly, the Ecotec name was also applied to both the Buick V6 Engine when used in Holden Vehicles, as well as the final DOHC derivatives of the previous GM Family II engine; the architecture was substantially re-engineered for this new Ecotec application produced since 2000. This engine family replaced the GM Family II engine, the GM 122 engine, the Saab H engine, and the Quad 4 engine. It is manufactured in multiple locations, to include Spring Hill Manufacturing, in Spring Hill, Tennessee, with engine blocks and cylinder heads cast at Saginaw Metal Casting Operations in Saginaw, Michigan.
The Northstar engine is a family of high-performance 90° V engines produced by General Motors between 1993 and 2011. Regarded as GM's most technically complex engine, the original double overhead cam, four valve per cylinder, aluminum block/aluminum head V8 design was developed by Oldsmobile R&D, but is most associated with Cadillac's Northstar series.
The Chrysler 1.8, 2.0, and 2.4 are inline-4 engines designed originally for the Dodge and Plymouth Neon compact car. These engines were loosely based on their predecessors, the Chrysler 2.2 & 2.5 engine, sharing the same 87.5 mm (3.44 in) bore. The engine was developed by Chrysler with input from the Chrysler-Lamborghini team that developed the Chrysler/Lamborghini Formula 1 V12 engine in the early 1990s.
The General Motors LS-based small-block engines are a family of V8 and offshoot V6 engines designed and manufactured by the American automotive company General Motors. Introduced in 1997, the family is a continuation of the earlier first- and second-generation Chevrolet small-block engine, of which over 100 million have been produced altogether and is also considered one of the most popular V8 engines ever. Spanning three generations, a new, sixth generation is expected to enter production soon. Various small-block V8s were and still are available as crate engines.
The Chevrolet big-block engine is a term for a series of large-displacement, naturally-aspirated, 90°, overhead valve, gasoline-powered, V8 engines; that were developed and produced by the Chevrolet Division of General Motors, from the 1950s until present.
The Chevrolet small-block engine is a series of gasoline-powered V8 automobile engines, produced by the Chevrolet division of General Motors in two overlapping generations between 1954 and 2003, using the same basic engine block. Referred to as a "small-block" for its size relative to the physically much larger Chevrolet big-block engines, the small-block family spanned from 262 cu in (4.3 L) to 400 cu in (6.6 L) in displacement. Engineer Ed Cole is credited with leading the design for this engine. The engine block and cylinder heads were cast at Saginaw Metal Casting Operations in Saginaw, Michigan.
The General Motors 60° V6 engine family is a series of 60° V6 engines produced for both longitudinal and transverse applications. All of these engines are 12-valve cam-in-block or overhead valve engines, except for the LQ1 which uses 24 valves driven by dual overhead cams. These engines vary in displacement between 2.8 and 3.4 litres and have a cast-iron block and either cast-iron or aluminum heads. Production of these engines began in 1980 and ended in 2005 in the U.S., with production continued in China until 2010. This engine family was the basis for the GM High Value engine family. These engines have also been referred to as the X engines as they were first used in the X-body cars.
The GM High Feature engine is a family of modern DOHC V6 engines produced by General Motors. The series was introduced in 2004 with the Cadillac CTS and the Holden Commodore (VZ).
The Buick V6 is an OHV V6 engine developed by the Buick division of General Motors and first introduced in 1962. The engine was originally 198 cu in (3.2 L) and was marketed as the Fireball engine. GM continued to develop and refine the 231 cu in (3.8 L) V6, eventually and commonly referred to simply as the 3800, through numerous iterations.
The High Value engine family from General Motors is a group of cam-in-block or overhead valve V6 engines. These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm (3.90 in) bore required offsetting the bores by 1.5 mm (0.059 in) away from the engine center line. These engines are the first cam-in-block engines to implement variable valve timing, and won the 2006 Breakthrough Award from Popular Mechanics for this innovation. For the 2007 model year, the 3900 engine featured optional displacement on demand or "Active Fuel Management" which deactivates a bank of cylinders under light load to increase highway fuel economy. It was rumored that GM would produce a 3-valve design, but that never came to be. These engines were produced primarily at the GM factory in Tonawanda, New York, and at the Ramos Arizpe engine plant in Mexico. The assembly line for this engine was manufactured by Hirata Corporation at its powertrain facility in Kumamoto, Japan.
The Duramax V8 engine is a family of 6.6-liter diesel V8 engines produced by DMAX, a wholly owned subsidiary of General Motors in Moraine, Ohio. The Duramax block and heads are supplied from reliable vendors of General Motors. This engine was initially installed in 2001 Chevrolet and GMC trucks, and has since become an option in pickups, vans, and medium-duty trucks. In 2006, production at Moraine was reportedly limited to approximately 200,000 engines per year. On May 9, 2007, DMAX announced the production of the 1,000,000th Duramax V8 at its Moraine facility, followed by the 2,000,000th on March 24, 2017.
Active Fuel Management is a trademarked name for the automobile variable displacement technology from General Motors. It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy. Estimated performance on EPA tests shows a 5.5–7.5% improvement in fuel economy.
The Oldsmobile V8, also referred to as the Rocket, is a series of engines that was produced by Oldsmobile from 1949 until 1990. The Rocket, along with the 1949 Cadillac V8, were the first post-war OHV crossflow cylinder head V8 engines produced by General Motors. Like all other GM divisions, Olds continued building its own V8 engine family for decades, adopting the corporate Chevrolet 350 small-block and Cadillac Northstar engine only in the 1990s. All Oldsmobile V8s were assembled at plants in Lansing, Michigan while the engine block and cylinder heads were cast at Saginaw Metal Casting Operations.
The Buick V8 is a family of V8 engines produced by the Buick division of General Motors (GM) between 1953 and 1981. All were 90° water-cooled V8 OHV pushrod engines, and all were naturally aspirated except one turbocharged version of the 215.
The term Cadillac V8 may refer to any of a number of V8 engines produced by the Cadillac division of General Motors since it pioneered the first such mass-produced engine in 1914.
The 122 engine was designed by Chevrolet and was used in a wide array of General Motors vehicles. The 122 was similar to the first two generations of the General Motors 60° V6 engine; sharing cylinder bore diameters and some parts. The 122 was available in the U.S. beginning in 1982 for the GM J platform compact cars and S-series trucks.
The GMC Acadia is a crossover SUV manufactured by General Motors for its GMC division. The first-generation GMC Acadia shared the GM Lambda platform with the Saturn Outlook, the Chevrolet Traverse, and the Buick Enclave. The Acadia went on sale in 2006 as a 2007 model in the United States, Canada and Mexico. The Acadia replaces three of the 7- or 8-seater vehicles on the Buick-Pontiac–GMC dealership network, the midsize GMC Safari van, the GMC Envoy, and the Pontiac Montana SV6 minivan for the domestic market. As of 2009, the Lambda vehicles had replaced the Buick Rainier, Buick Rendezvous, Buick Terraza, and the GMC Envoy XL and then subsequently the GMC Envoy, Chevrolet TrailBlazer and the Isuzu Ascender. A Denali version of the Acadia debuted for 2011. In 2017, the second generation Acadia was repositioned as a mid-size crossover utility vehicle in order to compete in the growing midsize SUV market against the likes of the Ford Explorer, Edge, and the Jeep Grand Cherokee.
The Chevrolet 90° V6 family of V6 engines began in 1978 with the Chevrolet 200 cu in (3.3 L) as the base engine for the all new 1978 Chevrolet Malibu. The original engine family was phased out in early 2014, with its final use as the 4.3 L (262 cu in) V6 engine used in Chevrolet and GMC trucks and vans. Its phaseout marks the end of an era of Chevrolet small-block engine designs dating back to the 1955 model year. A new Generation V 4.3 L (262 cu in) V6 variant entered production in late 2013, based on the LT1 small block V8 and first used in the 2014 Silverado/Sierra 1500 trucks.
The Chevrolet Turbo-Thrift engine is a straight-six produced from 1962 to 2001 by the Chevrolet division of General Motors. The entire series of engines was commonly called Turbo-Thrift, although the name was first used on the 230 cubic inch version that debuted in 1963. The new engine featured seven main bearings in lieu of the four bearing design of its predecessor, the "Stovebolt" engine, and was considerably smaller and approximately 100 lbs lighter.
The Chevrolet Gemini small-block engine is a dual-overhead cam (DOHC) V8 engine designed by General Motors. While technically a small-block engine because of its bore spacing of 4.4 inches, General Motors engineers do not consider it to be a part of the traditional Chevrolet small block lineage because of the substantial reworking, specialized development, and unique technical features distinguishing its design.