Caterpillar D379 Diesel Engine – Specifications

(Heavy-Duty Industrial / Oilfield Engine)

General

• Manufacturer: Caterpillar

• Engine Model: D379

• Engine Type: Inline 6-cylinder, 4-stroke diesel

• Aspiration: Turbocharged

• Fuel Type: Diesel

• Fuel System: Mechanical direct injection

• Duty Rating: Continuous heavy-duty service

• Era: Legacy heavy-iron CAT industrial engine

Performance (Typical Industrial Ratings)

(Exact rating varies by arrangement & governor)

• Rated Power: 650 – 750 HP

• Rated Speed: 1,000 – 1,200 RPM

• Peak Torque: Extremely high low-RPM torque

• Torque Rise: ~30%

Common Oilfield Ratings

• 700 HP @ 1,050 RPM

• 750 HP @ 1,200 RPM

Engine Specifications

• Configuration: Inline 6

• Displacement: ~1,450 in³ (≈23.8 L)

• Bore: 7.0 in (178 mm)

• Stroke: 7.5 in (191 mm)

• Compression Ratio: ~14.5:1

• Rotation: Counterclockwise (flywheel end)