Navistar DT engine

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Navistar DT engine
Overview
Manufacturer	Navistar International
Production	1971–2016 1971–2019 (Mexico) [1]
Layout
Configuration	Inline-6
Displacement	360 / 408 / 466 / 530 / 570 cu in (5.9 / 6.7 / 7.6 / 8.7 / 9.3 L)
Cylinder bore	4.59 inches
Valvetrain	OHV, 2 or 4 valves per cylinder
Combustion
Turbocharger	variable and fixed geometry turbocharged
Fuel system	direct injection and HEUI (hydraulic electronic unit injection)
Fuel type	Diesel
Output
Power output	170-350hp (commercial), 375hp military

The Navistar DT (Diesel Turbocharged or Diesel Turbo) engine family is a line of mid-range inline-6 diesel engines. With horsepower ratings ranging from 170 hp (130 kW) to 350 hp (260 kW), the Navistar DT engines are used primarily in medium-duty truck and bus applications such as school buses, although some versions have been developed for heavy-duty regional-haul and severe-service applications. Prior to 1986, Navistar International, then known as International Harvester Company, used the DT engine in farm and construction equipment.

From 1997 to 2004, the DT was also rebadged and sold by Detroit Diesel as the Series 40.^[2][3]