The Toyota B engine family was a series of inline-four diesel engines.
Toyota also had a 3.4 L (3389 cc) inline-six gasoline engine from 1937 to 1947 that was also called the B engine. The earlier engine was used in early Toyota cars and trucks and in the first version of the Land Cruiser when it was known as the BJ Jeep. The later engine was used in later versions of the Land Cruiser. The two engines are unrelated and were not made at the same time.
Toyota made 5 generations of the B family engines, each one identified with a number before the B letter. Also, Toyota uses a series of letters to identify technical improvements to their engines:
- The number 1 (one) before the number of the engine model means that the engine uses direct injection, otherwise, indirect injection
- The F letter after the B letter means that the engine is multivalvular. Since the B family are inline-fours, that means that the engine uses 16 valves.
- The T letter, means that the engine is turbocharged
- The E letter, means that the engine is electronically controlled engine control unit (ECU)
For example, the 15B-FTE Engine is the fifth generation of the B engines, comes with 16 valves, is turbocharged, direct-injected and uses an ECU.
In August 1988, Toyota released re-designed B series engines (specifically the B, 3B and 11B) with a number of improvements. A mono-block design (with no cylinder liners) was adopted. An onboard, timing gear driven vacuum pump replaced a previously alternator-driven vacuum pump (Later a gear-driven power steering pump would be added to the 3B, 14B and 15B platforms). Camshafts gained larger bearing journals and roller lifters replaced earlier solid lifters. Pushrod inspection galleries disappeared to make a more solid engine block. The flywheel changed from 6 to 8 bolts and a PCV hose replaced the road draft tube. Toyota does not make a distinction in the naming of these engines, but in user communities the August 1988-on 3B is referred to as the '3B-II'.
Features at a glance
B
The B is a 3.0 L inline-four eight-valve OHV diesel engine. Compression ratio is 21:1. Output is at 3,600 rpm, with of torque at 2,200 rpm. Later versions claim and . Versions of the B made from August 1988 onwards are informally referred to as a 'B-II' and share the same engine block casting as the 11B.
Applications
Land Cruiser 40
Dyna 3rd, 4th, 5th generation
Toyoace 5th generation
Daihatsu Delta V9/V12-series
1978-19?? Hino Ranger 2 (V10)
2B
The 2B is a 3.2 L inline 4 eight valve OHV diesel engine. Compression ratio is 21:1. Output is at 2,200 rpm, with of torque at 2,200 rpm.
Applications
Land Cruiser (BJ41/44 JDM) Coaster (BB10/11/15)
3B
The 3B is a 3.4 L inline 4 eight valve OHV diesel engine. Compression ratio is 20:1. Output is 90 hp (67 kW) at 3,500 rpm with 160 ft·lbf (217 N·m) of torque at 2,000 rpm. The 3B was offered with both in-line and rotary diesel injection pumps. Versions of the 3B made from August 1988 onwards are informally referred to as a '3Bii' and share the same engine block casting as the 14B. All post August 1988 3Bs have rotary diesel injection pumps.
Applications
Dyna 4th, 5th, 6th generation
Toyoace 4th, 5th generation
Landcruiser 40/60/70
Coaster 2nd, 3rd generation
4B
The 4B is a 3.7-litre inline-four eight-valve OHV diesel engine of the swirl chamber type. The 4B was only sold on the Japanese domestic market. The 4B was released in 1999 at the time that production of the 3B ceased. Unusually, the indirect injection 4B was released considerably later than the equivalent direct injection 14B engine, which was released in 1988.
11B
The 11B was released in 1985 and is a direct injection version of the original B engine. Power is and max torque is . In August 1988 an updated version of the 11B was released, similar to the informally named 'Bii' and '3Bii'.
13B
The 13B is a direct injection version of the 3B engine. Output for 1985 versions is and .
13B-T
The 13B-T is a turbocharged version of the 13B engine, with a compression ratio of 17.6:1. Output is 120 hp (89 kW) at 3,400 rpm with 159 ft·lbf (217 N·m) of torque at 2,200 rpm. The later "LASRE" version has at 3,400 rpm and at 2,000 rpm.
The 13B did not receive the full suite of improvements in August 1988 that the B, 3B and 11B received. At this time, the 13B received an 8 bolt flywheel and larger camshaft, but retained cylinder liners and pushrod inspection galleries. All versions of the 13B/13B-T came with in-line injection pumps. Production of the 13B/13B-T ended in 1989.