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Cummins 6BT5.9 Engine Overivew
The 5.9L Cummins, also known as the "12-Valve" Cummins was the first member of the Cummins B-Series to be used in a light truck vehicle. The 6BT used Bosch fuel systems, injector, and VE rotary pump and P7100 inline injection pumps. Some early 6BTs were supplied with CAV rotary pumps instead, before the Bosch system became the sole standard. This engine started life in 1984 designed as an agricultural engine, for use in Case agricultural equipment.
After 1989, the 6BT engine was used in light duty, medium duty and select heavy duty trucks and buses. The 6BT engine has recently become very popular for use in repowering various vehicles, in the UK they have proven very popular in the Land Rover community, commonly known as the ‘good’ conversion.
Configuration | In-line, 6 cylinder, 4-stroke diesel |
Aspiration | Turbocharged (6BT) | Turbocharged/Aftercooled (6BTA) |
Displacement | 5.9 L (359 in3) |
Bore & Stroke | 102 x 120 mm (4.02 x 4.75 in) |
Fuel System | Inline Injection Pump |
Horsepower | 130-205hp |
Application | Commercial, Industrial, Marine |
Production | 1984–1998 |
Camshaft drive | Gear driven |
Crankshaft | Forged steel, 7 main bearings |
System capacity with filter | 3.5 US gal (13 l; 2.9 imp gal) |
Cooling system | 6 US gal (23 l; 5.0 imp gal) coolant |
System capacity incl heater | 6.5 US gal (25 l; 5.4 imp gal) coolant |
Power output | 160 hp - 230 hp (172 kW) at 2500 rpm |
Torque | 400 - 440 lb⋅ft (597 N⋅m) at 1600 rpm |
Compression ratio | 17.5:1 |
Additional ratings may be available. Check with Qingbang.
Cummins 6BT5.9 Engine Ratings
| Model | Rated power output (kW@RPM) | Peaktorque (Nm@RPM) | Rated power output (HP) |
| 6BT5.9-C125 | 92@2200 | 540@1400 | 123HP |
| 6BT5.9-C130 | 97@2000 | 560@1500 | 130HP |
| 6BTA5.9-C150 | 112@2200 | 655@1500 | 150HP |
| 6BTA5.9-C165 | 123@2200 | 694@1500 | 165HP |
| 6BTA5.9-C170 | 127@2000 | 650@1500 | 170HP |
| 6BTA5.9-C180 | 132@2200 | 750@1300 | 177HP |
| 6BTA5.9-C180 | 132@2500 | 630@1500 | 177HP |
