International Maxxforce DT Engine
Power
210-300 HP
Torque
520-860 LB-FT
The MaxxForce DT is Navistar/International’s emissions-era evolution of the long-running DT466 inline-6 medium-duty diesel platform. The DT family earned its reputation in trucks, buses, and vocational applications for durability—helped by its well-known wet-sleeve design. When U.S. 2007 emissions regulations arrived, Navistar rebranded the DT engine line under the “MaxxForce” name; the DT466 became the MaxxForce DT (with related larger variants branded MaxxForce 9/10). In the following years, the platform continued to evolve for tighter standards, including updates associated with the 2010 emissions era. The MaxxForce DT was ultimately phased out around the 2015 model year as Navistar moved to other engine offerings in many applications.
MaxxForce DT Spec Sheet
Engine family: Navistar DT / MaxxForce DT (DT466-based)
Configuration: Inline 6-cylinder turbo-diesel
Displacement: 7.6L (466 cu in)
Bore x stroke: 4.59" x 4.68" (116.6 mm x 118.9 mm)
Construction: Cast-iron block / cast-iron head
Design note: Wet-sleeve cylinder design (DT family hallmark)
Horsepower range (typical MaxxForce DT calibrations): ~210–300 hp
Torque (commonly published max rating): up to ~860 lb-ft (varies by calibration/year)