Duramax I4 engine

Duramax I4 LWN
Duramax LWN
Overview
ManufacturerGeneral Motors Thailand
Production2015 – 2022
Layout
ConfigurationI4
Displacement2.8 L; 169.4 cu in (2,776 cc)
Cylinder bore3.70 in (94 mm)[1]
Piston stroke3.94 in (100 mm)[1]
Cylinder block materialCast gray iron
Cylinder head materialAluminum
ValvetrainDOHC 4 valves x cyl.
Valvetrain drive systemGears
Compression ratio16.5:1
Combustion
TurbochargerHoneywell variable-geometry vane with intercooler
Fuel systemHigh-pressure common-rail direct injection
ManagementBosch
Fuel typeDiesel
Cooling systemWater-cooled
Output
Power output181 hp (135 kW)
Torque output369 lb⋅ft (500 N⋅m)
Emissions
Emissions target standardEPA, Tier 3
Emissions control systemsOxidizing catalyst, DPF, EGR

The Duramax I4 engine is a family of turbocharged diesel I4 engines sold by General Motors in 2.5 and 2.8 liter sizes as an option for the Chevrolet Colorado, GMC Canyon, Chevrolet Express, and GMC Savana in southeast Asia and Oceania (Australia / New Zealand) from 2012, and in North America from 2016 through 2022. They are closely related to the VM Motori R 425 and A 428, and were produced at the General Motors Thailand plant in Rayong.

History

GM purchased a 50% stake in VM Motori from Penske Automotive in 2007. In 2010, VM released the A 428 (four-cylinder, 2.8 L displacement), developed from the earlier R 428, which was sold in North America briefly as an optional engine for the Jeep Liberty for the 2005 and 2006 model years. Fiat acquired the other half of VM from Penske in 2011 and purchased GM's share in 2013; as part of the sale, GM retained the rights to build engines that had been developed during its ownership, including the A 428.[2]

In 2011, GM completed a new engine plant in Rayong, Thailand, commencing production in September of the R 425 and A 428 as Duramax XLD25 and XLD28, respectively, for the Chevrolet Colorado and Trailblazer sold in southeast Asia and, under the Holden marque, in Oceania.[3][4] In 2013, these engines were updated as the Duramax LKH (2.5L) and LWH (2.8L), improving output and fuel consumption.[5][6]

The Rayong plant began producing the 2.8L Duramax I4 LWN starting in 2015, modified to meet emissions regulations in the United States.[2][7]

Engine RPO codes

LWN

RPO LWN was first introduced in 2016 and continued until 2022, after GM Thailand was dissolved in 2020. It is a 16-valve design with high-pressure common-rail direct injection. The diesel engine was discontinued after the 2022 model year.[8][9]

The following trucks use the LWN:

  • 2016–2022 Chevrolet Colorado / GMC Canyon (North America)
  • 2017–2022 Chevrolet Express / GMC Savana (North America)

XLD25 LP2

RPO XLD25 (LP2) was sold in Thailand, meeting Euro 4 emissions standards. It is a turbocharged 16V DOHC 2.5 L; 152.5 cu in (2,499 cc) engine with common-rail direct injection. The bore and stroke are 92 and 94 mm (3.62 and 3.70 in), respectively, with a rated output of 132 kW (177 hp; 179 PS) at 3,600 rpm and 440 N⋅m (320 lbf⋅ft) at 2,000 rpm.[10]

  • 2014–? Chevrolet Colorado
  • 2017–2020 Chevrolet Trailblazer

XLD25

As originally released, the Duramax XLD25 had an output of 110 kW (150 hp) at 3,800 RPM and 350 N⋅m (260 lbf⋅ft) at 2,000 RPM.[11]

  • 2012–2013 Chevrolet Colorado

XLD28

As originally released, the Duramax XLD28 had an output of 132 kW (177 hp) at 3,800 RPM and 440 or 470 N⋅m (320 or 350 lbf⋅ft) at 2,000 RPM, depending on the transmission.[11]

  • 2012–2013 Chevrolet Colorado

References

  1. ^ a b "2.8L I-4 LWN Duramax Turbo-Diesel Features & Specifications". GM Powered Solutions. Retrieved May 14, 2023.
  2. ^ a b "Yes, the 2.8L Duramax is a cousin of the Jeep CRD 2.8L from VM Motori". ID Parts [blog]. June 8, 2018. Retrieved 19 October 2023.
  3. ^ "New diesels power Chevy's global midsize trucks" (Press release). Chevrolet Pressroom. October 5, 2011. Retrieved 20 October 2023.
  4. ^ "Comparing GM's 4-Cylinder 'Baby' Duramax Turbo Diesels: 2.5L XLD25 vs. 2.8L XLD28". GM Authority. October 7, 2014. Retrieved 20 October 2023.
  5. ^ Smith, Bruce (December 25, 2013). "Duramax 2.8L: Meet the 4-cylinder diesel coming to the Chevrolet Colorado and GMC Canyon". Equipment World. Retrieved 20 October 2023.
  6. ^ "Chevrolet introduces second-generation Duramax 4-cylinder diesels; global engine". Green Car Congress. 11 October 2013. Retrieved 20 October 2023.
  7. ^ Sawyer, Christopher A. (December 2, 2015). "Diminutive Duramax Diesel: Big on Performance". Gardner Business Media. Retrieved 19 October 2023.
  8. ^ Wren, Wesley (July 28, 2022). "2023 Chevy Colorado Ditches The Diesel And V6". Autoweek. Retrieved 20 October 2023.
  9. ^ McEachern, Sam (July 3, 2022). "2023 Chevy Express To Drop Duramax Turbo-Diesel 2.8L Engine". GM Authority. Retrieved 20 October 2023.
  10. ^ "Fact Sheet: 2018 Chevrolet Colorado Centennial Edition" (PDF) (Press release). General Motors Thailand. Retrieved 20 October 2023.
  11. ^ a b "C-cab [brochure]" (PDF). General Motors Thailand. 2012. Retrieved 20 October 2023.

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