Detroit Diesel 6-71 Engine

Industrial / Oilfield Configuration

General

• Manufacturer: Detroit Diesel

• Engine Model: 6-71

• Engine Type: Inline 6-cylinder, 2-stroke diesel

• Aspiration: Naturally Aspirated (NA) or Turbocharged (6-71T / 6-71TI)

• Fuel System: Unit Injectors

• Governor: Mechanical

• Rotation: LH or RH (application dependent)

• Duty Rating: Continuous industrial duty

Performance Ratings (Typical)

Naturally Aspirated (6-71)

• Power Range: 165 – 238 HP

• Rated Speed: 1800 – 2100 RPM

• Peak Torque: ~500 – 600 lb-ft

Turbocharged (6-71T / 6-71TI)

• Power Range: 275 – 350 HP

• Rated Speed: 1800 – 2100 RPM

• Peak Torque: ~800 – 950 lb-ft

(Exact rating depends on injector size and governor setting)

Engine Specifications

• Displacement: 426 in³ (7.0 L)

• Bore: 4.25 in (108 mm)

• Stroke: 5.0 in (127 mm)

• Compression Ratio: ~17:1

• Firing Order: 1-5-3-6-2-4

• Scavenging: Roots blower (required on all 71-series)

Cooling & Lubrication

• Cooling: Jacket water cooled

• Oil System: Full-pressure

• Oil Capacity: ~5 – 6 gallons

• Oil Type: SAE 40 (typical for 2-stroke Detroit)