The Navistar

Navistar International

Navistar International Corporation is a United States-based holding company that owns the manufacturer of International brand commercial trucks, MaxxForce brand diesel engines, IC Bus school and commercial buses, Workhorse brand chassis for motor homes and step vans, and is a private label...

 DT engine family is a line of mid-range inline-6 diesel engine

Diesel engine

A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...

s. With
horsepower

Horsepower

Horsepower is the name of several units of measurement of power. The most common definitions equal between 735.5 and 750 watts.Horsepower was originally defined to compare the output of steam engines with the power of draft horses in continuous operation. The unit was widely adopted to measure the...

 ratings ranging from 170 hp to 350 hp, the Navistar DT engines are used primarily in medium-duty truck and bus
applications, 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.
The DT engines are of a wet-sleeve design.