Isuzu B engine

Isuzu considered the B engine its small truck engine. It was initially designed in 1969 as a 3.6-liter four-cylinder or a 5.4-liter six-cylinder direct injection unit, other displacements were added later on, and in 1980 a 3.3-liter version appeared. Isuzu engines carry a two-character prefix which designates the number of cylinders and the engine family, so the B family covers the units whose names begin with that letter after the cylinder count. The English Wikipedia list of Isuzu engines places the B engine among Isuzu's four-cylinder diesel families, next to the C, E, H and J series.