The Complete Guide to Hyundai 6.7L Cummins Engine Series

Hyundai 6.7L Cummins Series (QSB6.7 / B6.7)

The Comprehensive Guide to Hyundai Construction Equipment Powerplants

Hyundai Equipment

Built on a Legend: The Cummins 6.7L DNA

Hyundai Heavy Industries relies heavily on the 6.7L Cummins engine architecture (QSB6.7 and B6.7) to power its mid-sized excavators and wheel loaders. Known for delivering high low-end torque essential for heavy digging and bucket loads, this 24-valve engine platform spans multiple emission tiers—from early Tier 3 mechanical-electronic hybrids to modern Stage V intelligence. At Choate Engineering Performance, we remanufacture these engines with blueprinted machining, full rotational balancing to within 2 grams, and upgraded valvetrain components to eliminate OEM thermal fatigue.

6.69 LitersDisplacement
107mm x 124mmBore & Stroke
HPCRHigh Pressure Common Rail
24-ValveCylinder Head

Machine Compatibility

From 20-to-27 ton excavators to high-production wheel loaders, cross-reference your machine below. To ensure proper engine fitment, locate your Engine Serial Number before placing your order.

Crawler Excavators

  • R250LC-7A, R290LC-7A Tier 3
  • R210LC-9, R235LCR-9 Tier 3
  • R220LC-9A, R235LCR-9A Tier 4i
  • HX210L, HX220L, HX235LCR Tier 4F
  • HX260L Tier 4F
  • HX220AL, HX260A L Stage V

Wheel Loaders

  • HL740-7A, HL757-7A, HL760-7A Tier 3
  • HL740-9, HL757-9, HL760-9 Tier 3 / 4i
  • HL940, HL955 Tier 4F
  • HL940A, HL955A Stage V

Wheeled Excavators

  • R170W-9, R210W-9 Tier 3
  • HW210A Stage V
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Verify Before You Buy

To ensure 100% bolt-in mounting, oil pan clearance, and wiring harness compatibility, always verify your 8-digit Cummins Engine Serial Number (ESN) located on the engine rocker cover or front gear housing tag.

Need help confirming fitment? Supply your Hyundai Machine Serial Number and ESN to our team, and we will cross-reference the exact engine arrangement for your equipment.

Troubleshooting & Common Fault Codes

Dealing with a CA559 rail pressure code, DPF regeneration issues, or VGT actuator failures on your Hyundai equipment? We've put together a technical diagnostic guide for the 6.7L Cummins engine platform.

READ THE TECH GUIDE

Stop Losing Money to Downtime

Our remanufactured Hyundai 6.7L long blocks feature CNC blueprinting, 2-gram rotational balancing, and upgraded internals built to outlast factory replacements.


View Upgraded Options

Or Call an Expert: 901-553-9847