DMAX is an American manufacturer of the
Duramax V8 diesel engine
The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...
s for
truck
A truck or lorry is a motor vehicle designed to transport freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construct ...
s, based in
Dayton, Ohio
Dayton () is a city in Montgomery County, Ohio, United States, and its county seat. It is the List of cities in Ohio, sixth-most populous city in Ohio, with a population of 137,644 at the 2020 United States census, 2020 census. The Dayton metro ...
. Engine production began in
Moraine, Ohio in 2000.
History
DMAX originally was announced in 1997 as a 60-40
joint venture
A joint venture (JV) is a business entity created by two or more parties, generally characterized by shared ownership, shared returns and risks, and shared governance. Companies typically pursue joint ventures for one of four reasons: to acce ...
between and operated by
General Motors
General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. The company is most known for owning and manufacturing f ...
and
Isuzu
, commonly known as Isuzu (, ), is a Japanese multinational automobile manufacturer headquartered in Yokohama, Kanagawa Prefecture. Its principal activity is the production, marketing and sale of Isuzu commercial vehicles and diesel engines ...
. Diesel engine production started in July 2000. The company's
Duramax V8 engine has been extremely successful for GM, raising that company's diesel pickup market share to 30% in 2002, up from approximately 5% in 1999.
The DMAX plant was built in
Moraine
A moraine is any accumulation of unconsolidated debris (regolith and Rock (geology), rock), sometimes referred to as glacial till, that occurs in both currently and formerly glaciated regions, and that has been previously carried along by a gla ...
on a land grant site adjacent to a GM plant that made the
6.2/6.5 L Diesel V8 designed by
Detroit Diesel. Production of that engine began in 1982. The DMAX Moraine plant was completed in 1999,
[ next to Moraine Assembly, which shut down in 2008. The DMAX Moraine plant added 80 workers in 2005.
The plant is planning to increase production from 580 engines a day, in 2017, to 700 engines a day. To further expand production, in 2019, GM began construction of a new DMAX plant in Brookville, which would send machined engine components to Moraine for final assembly. Completed engines were shipped from Moraine to ]Flint, Michigan
Flint is the largest city in Genesee County, Michigan, United States, and its county seat. Located along the Flint River (Michigan), Flint River northwest of Detroit, it is a principal city within the Central Michigan, Mid Michigan region. Flin ...
for assembly into vehicles.[
According to financial filings, Isuzu wound down its investment in DMAX in May 2022,][ leaving the company wholly owned by GM. In June 2023, GM announced plans to shift Duramax V8 production from Moraine to an expanded Campus Boulevard plant in Brookville by 2025.]
Engines
* Duramax V8 engine – 6.6 L V8 (produced at DMAX)
Completed engines are built for the GMC Sierra, Chevrolet Silverado, and Navistar trucks. Short blocks are produced for Gale Banks Engineering, who complete the engines for the Joint Light Tactical Vehicle, and marine fishing boats.[
]
Other Duramax-branded engines
General Motors produced multiple diesel engines under the Duramax brand, but these were not built in Moraine. DMAX, Ltd. exclusively produces the Duramax V8.
References
External links
*
{{DEFAULTSORT:Dmax (Engines)
General Motors factories
Isuzu
Joint ventures
Diesel engine manufacturers
Companies based in Dayton, Ohio
1998 establishments in Ohio
Engine manufacturers of the United States