4-stroke cycle diesel engine 

Uses a push-rod design with a camshaft in the block and a gear-driven camshaft and oil pump. 

Features a belt-driven water pump and includes a cooling system, with capacity typically around 28.0 L (7.4 U.S. gal). 

Includes an engine oil cooler and has an oil change interval of 250 hours for some models. 

Produced from 1992 to 1998, it was the predecessor to the 3126 and C7 engines, which share a similar basic block design. 

Found in marine propulsion systems for powerboats and tugboats, as well as in medium-duty trucks like city and school buses, and various industrial equipment and generators.