Toyota B engine

The Toyota B engine family was a series of inline-four diesel engines. Toyota released five generations of it, each identified by a number before the B, with letters after the B marking improvements: a leading 1 means direct injection, F means a multivalve head of 16 valves in an inline-four, T means turbocharged and E means electronic engine control, so the 15B-FTE is the fifth generation with 16 valves, a turbocharger, direct injection and an ECU. In August 1988 the B, 3B and 11B were redesigned with a mono-block design without cylinder liners and a timing-gear driven vacuum pump. An earlier 3.4 litre inline-six petrol engine of 1937 to 1947 was also called the B engine, but the two are unrelated. The diesel B was used in the Land Cruiser 40 and the Dyna.