Duramax I4 engine
{{Infobox automobile engine
| name = Duramax I4 LWN
| image = 2019 Detroit Auto Show (46326957894).jpg
| caption = Duramax LWN
| manufacturer = General Motors Thailand
| production = 2015 – 2022
| configuration = I4
| predecessor =
| valvetrain = DOHC 4 valves x cyl.
| fueltype = Diesel
| fuelsystem = High-pressure common-rail direct injection
| coolingsystem = Water-cooled
| block = Cast gray iron
| head = Aluminum
| turbocharger = Honeywell variable-geometry vane with intercooler
| timing = Gears
| compression = 16.5:1
| management = Bosch
| emissions control = Oxidizing catalyst, DPF, EGR
| emissions level = EPA, Tier 3
| displacement = {{convert|2776|cc|L cuin|1|order=flip|abbr=on}}
| bore = {{convert|94|mm|in|2|abbr=on|disp=flip}}{{cite web |url=https://poweredsolutions.gm.com/products/lwn-engine/ |title=2.8L I-4 LWN Duramax Turbo-Diesel Features & Specifications |publisher= GM Powered Solutions |access-date=May 14, 2023}}
| stroke = {{convert|100|mm|in|2|abbr=on|disp=flip}}
| idle =
| power = {{convert|181|hp|0|abbr=on}}
| torque = {{convert|369|lbft|Nm|0|abbr=on}}
}}
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.
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.{{cite press release |url=https://media.gm.com/media/us/en/chevrolet/news.detail.html/content/Pages/news/us/en/2011/Oct/1005_diesels.html |title=New diesels power Chevy's global midsize trucks |date=October 5, 2011 |publisher=Chevrolet Pressroom |access-date=20 October 2023}}{{cite news |url=https://gmauthority.com/blog/2014/10/comparing-gms-4-cylinder-baby-duramax-turbo-diesels-2-5l-xld25-vs-2-8l-xld28/ |title=Comparing GM's 4-Cylinder 'Baby' Duramax Turbo Diesels: 2.5L XLD25 vs. 2.8L XLD28 |date=October 7, 2014 |work=GM Authority |access-date=20 October 2023}} In 2013, these engines were updated as the Duramax LKH (2.5L) and LWH (2.8L), improving output and fuel consumption.{{cite news |url=https://www.equipmentworld.com/construction-equipment/article/14952905/duramax-28l-meet-the-4-cylinder-diesel-coming-to-the-chevrolet-colorado-and-gmc-canyon |title=Duramax 2.8L: Meet the 4-cylinder diesel coming to the Chevrolet Colorado and GMC Canyon |date=December 25, 2013 |author=Smith, Bruce |work=Equipment World |access-date=20 October 2023}}{{cite news |url=https://www.greencarcongress.com/2013/10/20131011-duramax.html |title=Chevrolet introduces second-generation Duramax 4-cylinder diesels; global engine |date=11 October 2013 |work=Green Car Congress |access-date=20 October 2023}}
The Rayong plant began producing the 2.8L Duramax I4 LWN starting in 2015, modified to meet emissions regulations in the United States.{{cite web |url=https://idpartsblog.com/2018/06/08/yes-the-2-8l-duramax-is-a-cousin-of-the-jeep-crd-2-8l-from-vm-motori/ |title=Yes, the 2.8L Duramax is a cousin of the Jeep CRD 2.8L from VM Motori |date=June 8, 2018 |work=ID Parts [blog] |access-date=19 October 2023}}{{cite news |url=https://www.gardnerweb.com/articles/diminutive-duramax-diesel-big-on-performance |title=Diminutive Duramax Diesel: Big on Performance |author=Sawyer, Christopher A. |date=December 2, 2015 |work=Gardner Business Media |access-date=19 October 2023}}
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.{{cite news |url=https://www.autoweek.com/news/future-cars/a40746561/2023-chevrolet-colorado-facts-figures/ |title=2023 Chevy Colorado Ditches The Diesel And V6 |author=Wren, Wesley |date=July 28, 2022 |work=Autoweek |access-date=20 October 2023}}{{cite news |url=https://gmauthority.com/blog/2022/07/2023-chevy-express-to-drop-duramax-turbo-diesel-2-8l-engine/ |title=2023 Chevy Express To Drop Duramax Turbo-Diesel 2.8L Engine |author=McEachern, Sam |date=July 3, 2022 |work=GM Authority |access-date=20 October 2023}}
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 {{convert|2499|cc|L cuin|1|order=flip|abbr=on}} engine with common-rail direct injection. The bore and stroke are {{cvt|92|and|94|mm|in|2}}, respectively, with a rated output of {{cvt|132|kW|hp PS}} at 3,600 rpm and {{cvt|440|Nm}} at 2,000 rpm.{{cite press release |url=https://media.gm.com/dld/content/Pages/news/th/en/2017/nov/1104_2018-Colorado-Centennial-Edition/_jcr_content/rightpar/download/file.res/Colorado%20Centennial%20Fact%20Sheet.pdf |title=Fact Sheet: 2018 Chevrolet Colorado Centennial Edition |publisher=General Motors Thailand |access-date=20 October 2023}}
- 2014–? Chevrolet Colorado
- 2017–2020 Chevrolet Trailblazer
=XLD25=
As originally released, the Duramax XLD25 had an output of {{cvt|110|kW|hp}} at 3,800 RPM and {{cvt|350|Nm}} at 2,000 RPM.{{cite web |url=https://media.gm.com/content/dam/Media/documents/TH/vehicles/TC-brochure-C%20cab%202012-A4(21x29.7)n%20eng%20copy.pdf |title=C-cab [brochure] |lang=en |date=2012 |publisher=General Motors Thailand |access-date=20 October 2023}}
- 2012–2013 Chevrolet Colorado
=XLD28=
References
{{reflist}}
External links
- {{cite web |url=https://dieselresource.com/diesel-resources/2-8l-lwn-duramax-specs/ |title=2.8L LWN Duramax specs, tow ratings, and fuel economy |date=August 31, 2020 |work=Diesel Resource}}