Cummins ISB 6.7 Engine UK: Specifications, Performance, Applications & Buying Guide

Cummins ISB 6.7 Engine for Sale UK, you are looking at one of Cummins’ most widely used six-cylinder diesel platforms for medium-duty trucks, buses, coaches and specialist vehicles. The ISB 6.7 combines a 6.7-litre displacement with strong low-speed torque, electronic engine management and, depending on generation and application, emissions technology designed for European regulations.

The European B6.7/ISB6.7 platform is available in a range of power ratings. Cummins lists European B6.7 Euro VI versions at 220–320 hp (164–239 kW) and 899–1,200 Nm of torque, making the engine suitable for demanding commercial applications.

What Is the Cummins ISB 6.7?

The Cummins ISB 6.7 is a 6.7-litre inline-six diesel engine from the Cummins B Series family. It has been developed for applications where durability, fuel efficiency, torque and long operating hours are important.

For European truck and bus applications, Cummins has offered ISB6.7 versions covering emissions standards from earlier Euro levels through Euro VI, depending on engine generation.

The engine’s six-cylinder configuration provides smooth power delivery, while technologies such as high-pressure common-rail fuel injection and variable-geometry turbocharging (VGT) help deliver strong torque and drivability.

Cummins ISB 6.7 UK Specifications

Specifications vary according to model year, emissions standard, vehicle application and calibration. A typical European B6.7 Euro VI specification includes:

Cummins specifically identifies the Euro VI B6.7 for medium-duty trucks, Euro trucks and buses, and motorcoach applications.

Cummins ISB 6.7 Engine Power and Torque

One of the biggest advantages of the ISB 6.7 is its torque output relative to its displacement.

Depending on specification, European versions can produce up to 320 hp and 1,200 Nm. Cummins notes that the 2017 development of the ISB6.7 increased the peak torque rating to 1,200 Nm and introduced higher power ratings for trucks and buses.

This strong torque makes the engine particularly useful for:

• Medium-duty trucks
• Rigid trucks
• Buses
• Coaches
• Specialist commercial vehicles
• Heavy-duty vocational applications
• Certain hybrid vehicle configurations

Cummins ISB 6.7 Euro 6 / Euro VI Engine

For UK buyers, emissions specification is particularly important when purchasing a used or replacement engine.

Cummins’ European B6.7 Euro VI uses an integrated emissions-control system incorporating technologies such as EGR, VGT, diesel particulate filtration and selective catalytic reduction (SCR) on applicable configurations.

The exact emissions equipment should always be checked against the engine’s ESN, CPL, calibration and donor vehicle, rather than relying only on the “6.7” engine designation.

This is especially important when buying a replacement Cummins engine for a UK-registered commercial vehicle.

Cummins ISB 6.7 Engine Weight

Engine weight varies depending on configuration and equipment.

Cummins lists a dry B6.7 engine weight of approximately 522 kg (1,150 lb) for certain configurations. Complete systems can weigh substantially more once aftertreatment and other components are included.

For shipping purposes, buyers should therefore distinguish between:

Engine dry weight: approximately 522 kg for the referenced configuration

Shipping weight: higher after adding fluids, accessories, pallet/crate and packaging.

Cummins ISB 6.7 Fuel System

The ISB 6.7 uses a high-pressure common-rail fuel system on relevant generations. Cummins describes European ISB6.7 technology with injection pressures of up to approximately 1,800 bar on specified versions.

The electronically controlled fuel system allows the engine management system to adjust injection characteristics according to load, speed and operating conditions.

For a used engine, it is important to inspect:

• Injectors
• High-pressure fuel system
• Fuel rail
• Fuel pump
• Fuel filters
• Wiring
• ECM
• Sensors
• Fuel contamination

Cummins ISB 6.7 Turbocharger

The B6.7 uses Cummins Variable Geometry Turbocharger technology on applicable configurations.

VGT technology helps the engine generate strong torque at lower engine speeds while improving drivability. Cummins identifies the VGT as one of the important technologies used on the European B6.7 platform.

When purchasing a used ISB 6.7 engine, inspect the turbocharger for:

• Shaft play
• Oil leakage
• Damaged compressor blades
• Excessive exhaust smoke
• VGT actuator operation
• Boost-pressure problems

Cummins ISB 6.7 Applications in the UK

The Cummins 6.7 diesel is particularly attractive for commercial applications because of its combination of compact size, torque and durability.

Potential applications include:

Trucks

The B6.7 is designed for medium-duty truck applications and is available in multiple power and torque ratings.

Buses and Coaches

Cummins has developed ISB6.7 configurations specifically for buses and coaches, including European applications.

Specialist Vehicles

The engine’s power density makes it suitable for applications where installation space and vehicle weight are important considerations. Cummins describes the ISB6.7 as suitable for rigid trucks, buses and speciality vehicles.

Buying a Cummins ISB 6.7 Engine in the UK

If you are looking to buy a Cummins ISB 6.7 engine in the UK, don’t choose an engine based solely on displacement.

Before purchasing, request:

1. Engine serial number (ESN)
2. Engine model
3. CPL number
4. Horsepower rating
5. Torque rating
6. Euro emissions specification
7. ECU/ECM information
8. Mileage or operating hours
9. Compression or health-test information where available
10. Oil-pressure information
11. Turbocharger condition
12. Injector condition
13. Aftertreatment configuration
14. Complete list of included accessories

These details help determine whether the engine will actually be compatible with your vehicle.

Used vs Rebuilt Cummins ISB 6.7 Engine

UK buyers generally have several options when sourcing a replacement engine:

Used Engine

A used ISB 6.7 can be an economical replacement when the engine’s history and condition are documented.

Reconditioned Engine

A professionally reconditioned engine can offer a balance between cost and reliability, depending on the quality of the rebuild and components used.

Rebuilt Engine

A fully rebuilt engine may be appropriate for demanding applications where the buyer wants renewed internal components and documented machining and assembly work.

Complete Replacement Engine

For commercial vehicles, purchasing a complete engine with compatible accessories, ECM and emissions equipment can simplify installation, but compatibility must still be verified.

Cummins ISB 6.7 Maintenance

Maintenance requirements depend on the specific generation and duty cycle. Cummins provides different service intervals for different ISB6.7 versions.

For example, Cummins lists oil/filter and fuel-filter intervals that vary between emissions generations and applications, while overhead adjustment intervals can reach approximately 241,000 km / 5,000 hours / 48 months on certain configurations.

Always follow the maintenance schedule applicable to the exact engine serial number and application.

Why Choose a Cummins ISB 6.7?

The Cummins ISB 6.7 remains attractive because it offers:

• 6.7-litre inline-six diesel configuration
• Strong low-speed torque
• Multiple horsepower ratings
• Common-rail fuel injection
• VGT turbocharging on applicable versions
• Proven commercial-vehicle applications
• European emissions-compliant versions
• Broad parts and service support
• Suitability for trucks, buses and specialist vehicles

For UK buyers, choosing the correct emissions generation and engine configuration is just as important as choosing the correct displacement.

Cummins ISB 6.7 Engine for Sale UK

If you are looking for a Cummins ISB 6.7 engine for sale in the UK, compare engines by ESN, CPL, horsepower, emissions standard, application and included accessories.

A properly matched ISB 6.7 can be an excellent replacement powerplant for a compatible truck, bus or commercial vehicle. Before ordering, confirm the engine specification against the original vehicle to avoid compatibility problems with the ECM, transmission, wiring, turbocharger and emissions system.

Frequently Asked Questions

How many litres is a Cummins ISB 6.7?

The Cummins ISB/B6.7 is a 6.7-litre six-cylinder diesel engine. Cummins lists the displacement as 6.7 L on B6.7 specifications.

How much horsepower does a Cummins ISB 6.7 make?

Power depends on the version. European B6.7 Euro VI models are listed at approximately 220–320 hp.

How much torque does the Cummins ISB 6.7 produce?

European Euro VI versions are listed at approximately 899–1,200 Nm, depending on rating.

Is the Cummins ISB 6.7 suitable for UK trucks?

Yes. Cummins specifically markets European B6.7 versions for medium-duty trucks, Euro trucks and buses, and motorcoaches.

Is the ISB 6.7 the same as the B6.7?

The naming depends on generation and application. Cummins uses both ISB6.7 and B6.7 designations across different generations and markets, so the exact ESN, CPL and emissions specification should be checked before purchasing.

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