________________________________________________________________________________

Volvo Penta D6-310 Engine

The Volvo Penta D6-310 is an in-line 6-cylinder marine diesel engine engineered for high-performance marine applications. Developed from the latest advancements in modern diesel technology, it utilizes a heavy-duty cast-iron cylinder block and head with a ladder frame design to achieve robust structural integrity. By pairing a large 5.5-liter swept volume with advanced Electronic Vessel Control (EVC) and common rail injection, the engine delivers exceptional diesel performance, rapid acceleration, and high torque output while maintaining low emissions and minimized noise levels.

Valve Configuration: Double overhead camshafts (DOHC). Valves per Cylinder: 4 valves per cylinder (24 valves total) driven via a rear-end transmission train. Serviceability: Equipped with replaceable valve seats. Crankshaft Power: 228 kW (310 hp) at an engine speed of 3500 rpm. Bore: 103 mm. Stroke: 110 mm. Displacement: 5.5 liters (336 cubic inches). Compression Ratio: 17.5:1.

Lubrication System Filtration: Features a multi-stage layout with easily replaceable, separate full-flow and by-pass oil filters. Piston Cooling: Features dedicated oil-cooled pistons equipped with two compression rings and one oil scraper ring. Thermal Management: Integrated seawater-cooled tubular oil cooler.

Cooling System Circuit Type: Thermostatically regulated freshwater cooling loop acting as the primary engine thermal circuit. Heat Exchanger: Heavy-duty tubular heat exchanger equipped with a separate, large-volume expansion tank. Auxiliary Circuits: The turbocharger is fully integrated into the freshwater-cooling circuit. The system includes a seawater strainer, an easily accessible impeller pump, and is factory-prepared with a dedicated hot water outlet connection.

Fuel System: Common rail fuel injection system operating under high pressure. Management: Fully managed by a dedicated electronic engine control unit (integrated with EVC) for precision fuel delivery processing, optimization based on ambient parameters, and diagnostics. Filtration: System protected via a fine primary fuel filter paired with an integrated water separator.

General Technical Data

Engine Specifications

Engine Model ............... Volvo Penta D6-310
Engine Type ............... 4-cycle inline 6-cylinder direct injection liquid-cooled marine diesel
Number of Cylinders ............... 6
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 4.06 (103.0)
Engine Stroke, in (mm) ............... 4.33 (110.0)
Displacement, cu.in (L) ............... 336 (5.5)
Rated Engine Power, hp (kW) ............... 310 (228) at crankshaft
Propeller Shaft Power, hp (kW) ............... 303 (223)
Rated Engine Speed, rpm ............... 3500
Low Idle Speed, rpm ............... 600
High Idle Speed, rpm ............... 3650-3750
Aspiration Type ............... Turbocharged with charge air aftercooler
Compression Ratio ............... 17.5:1
Firing Order ............... 1-5-3-6-2-4
Combustion System ............... Direct injection central re-entrant piston bowl design
Piston Cooling Method ............... Pressurized under-piston continuous oil spray nozzles
Turbocharger Design ............... Single-stage fixed geometry with mechanical wastegate valve
Aftercooler System ............... Seawater-cooled multi-pass tube and shell heat exchanger
Cylinder Block Material ............... Cast iron
Cylinder Head Material ............... Cast iron
Valves Per Cylinder ............... 4
Camshaft Configuration ............... Double overhead camshafts (DOHC)
Lubrication System ............... Full-pressure lubrication with gear pump
Oil Pump Drive ............... Gear-driven by crankshaft timing gear
Oil Filter Type ............... Full-flow spin-on cartridge with secondary bypass filter
Cooling System ............... Closed-loop freshwater circuit with seawater heat exchanger
Water Pump Config ............... Centrifugal belt-driven freshwater pump and impeller seawater pump
Air Filter Type ............... Washable multi-layer dry element
Emission Certification ............... EU RCD Stage II, US EPA Tier 3, IMO NOx
Starting System ............... Electric starter motor
Electrical System ............... 12V or 24V
Alternator Capacity ............... 115A or 80A

Fuel System

Fuel Injection System Architecture ............... High-pressure common rail system
High-Pressure Fuel Pump Model ............... Bosch CP3.3 three-plunger radial piston pump
Maximum Common Rail Injection Pressure, bar (MPa) ............... 1600 (160)
Minimum Cranking Rail Pressure, bar (MPa) ............... 200 (20)
Fuel Injector Actuation Method ............... Fast-acting electromagnetic solenoid valves
Pressure Control Mechanism ............... Fuel proportional control valve (MPROP) at pump inlet
Fuel Injection Control Unit Type ............... Bosch EDC7 electronic controller module
Low-Pressure Feed Pump Type ............... Mechanical gear pump integrated into back of main hp pump
Governor System Type ............... Electronic Vessel Control (EVC) microprocessor management
Fuel Feed Line Pressure range, bar (kPa) ............... 4.5-5.5 (450-550)
Return Line Fuel Pressure, bar (kPa) ............... Less than 0.5 (50)
Fuel Return Flow Rate, L/hr (US gal/hr) ............... 120-150 (31.7-39.6)
Maximum Allowed Fuel Inlet Temperature, F (C) ............... 140 (60)
Fuel Cooler Assembly Type ............... Seawater-cooled tube heat exchanger on return fuel line
Injector Backleak Pressure Limit, bar (kPa) ............... Max 1.2 (120)
Rail Pressure Sensor Range, bar (MPa) ............... 0-1800 (0-180)
Fuel Injector Spray Pattern ............... 8 symmetric multi-hole micro-orifices targeting piston center bowl
EVC Fuel Rate Management ............... Continuous duty cycle pulse-width adjustment via EDC7 maps
Fuel Recommendation Grade ............... Ultra-low sulfur marine diesel fuel No. 2-D or EN 590 compliant

Dimensions and Weight

Overall Length, in (mm) ............... 47.2 (1200)
Total Length with HS63AE Gear, in (mm) ............... 54.3 (1380)
Total Length with HS80AE Gear, in (mm) ............... 56.1 (1425)
Overall Width, in (mm) ............... 33.1 (840)
Overall Height, in (mm) ............... 34.6 (880)
Dry Weight, lbs (kg) ............... 1279 (580)
Total Weight with HS63AE Gear, lbs (kg) ............... 1446 (655)
Total Weight with HS80AE Gear, lbs (kg) ............... 1493 (677)
Total Weight with DPH Duoprop Drive, lbs (kg) ............... 1653 (750)

Maintenance Data

Service Information

Normal Operating Oil Pressure, psi (kPa) ............... 63.8 (440)
Minimum Hot Idle Oil Pressure, psi (kPa) ............... 18.1 (125)
Oil Pressure Relief Valve, psi (kPa) ............... 79.7 (550)
Lubrication Oil Temperature Range, F (C) ............... 194-230 (90-110)
Thermostat Opening Initiation Temperature, F (C) ............... 180 (82)
Thermostat Fully Open Temperature, F (C) ............... 198 (92)
Cooling Expansion Tank Pressure Cap, psi (kPa) ............... 10.1 (70)
Turbocharger Boost Pressure Range, psi (kPa) ............... 23.2-26.1 (160-180)

Engine Oil and Coolant

Engine Oil Type .................. SAE 30, SAE 10W-30, or SAE 15W-40
API Service Classifications ......................... CH-4 or CI-4
Engine Oil Capacity (Total), qt (L) ............... 21.1 (20.0)
Engine Oil Capacity (Low level), qt (L) ............... 18.0 (17.0)
Cooling System Capacity, qt (L) ............... 16.9 (16.0)
Reverse Gear HS63AE Fluid Capacity, qt (L) ............... 4.2 (4.0)
Reverse Gear HS80AE Fluid Capacity, qt (L) ............... 5.8 (5.5)
DPH Duoprop Drive Oil Sump Capacity, qt (L) ............... 5.5 (5.2)

Service Intervals

Change oil and filter ............... Every 200 hours
Service air cleaner ............... Every 100 hours
Replace air cleaner ............... Every 400 hours
Replace fuel filter ............... Every 200 hours
Fuel system inspection ............... Every 1200 hours
Change coolant ............... Every 1000 hours
Compression test ............... Every 2000 hours
Replace drive belt ............... Every 400 hours
Replace impeller ............... Every 200 hours
Service heat exchanger ............... Every 400 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 4.0551-4.0559 (103.000-103.020)
Cylinder Bore Maximum Out-of-Round, in (mm) ............... 0.0031 (0.080)
Cylinder Bore Maximum Taper, in (mm) ............... 0.0039 (0.100)
Main Bearing Journal Diameter, in (mm) ............... 3.3461-3.3468 (84.990-85.010)
Main Bearing Oil Clearance, in (mm) ............... 0.0016-0.0035 (0.040-0.090)
Main Bearing Shell Thickness, in (mm) ............... 0.0984-0.0988 (2.500-2.510)
Connecting Rod Journal Diameter, in (mm) ............... 2.5587-2.5594 (64.990-65.010)
Connecting Rod Journal Max Out-of-Round, in (mm) ............... 0.0004 (0.010)
Connecting Rod Oil Clearance, in (mm) ............... 0.0014-0.0031 (0.035-0.080)
Crankshaft End Play, in (mm) ............... 0.0039-0.0118 (0.100-0.300)
Connecting Rod Big End Bore Diameter, in (mm) ............... 2.7165-2.7171 (69.000-69.015)
Piston-to-Cylinder Wall Clearance, in (mm) ............... 0.0027-0.0039 (0.070-0.100)
Piston Skirt Outside Diameter, in (mm) ............... 4.0519-4.0523 (102.920-102.930)
Piston Pin Bushing Inner Diameter, in (mm) ............... 1.5752-1.5756 (40.010-40.020)
Piston Pin Outer Diameter, in (mm) ............... 1.5746-1.5748 (39.995-40.000)
Top Ring Groove Side Clearance, in (mm) ............... 0.0035-0.0051 (0.090-0.130)
Second Ring Groove Side Clearance, in (mm) ............... 0.0020-0.0035 (0.050-0.090)
Oil Ring Groove Side Clearance, in (mm) ............... 0.0016-0.0031 (0.040-0.080)
TopRing End Gap, in (mm) ............... 0.0118-0.0177 (0.300-0.450)
Second Ring End Gap, in (mm) ............... 0.0197-0.0275 (0.500-0.700)
Oil Ring End Gap, in (mm) ............... 0.0098-0.0197 (0.250-0.500)
Cylinder Head Deck Surface Flatness, in (mm) ............... 0.0020 (0.050)
Cylinder Block Deck Surface Flatness, in (mm) ............... 0.0031 (0.080)
Intake Valve Head Diameter, in (mm) ............... 1.4567-1.4646 (37.000-37.200)
Exhaust Valve Head Diameter, in (mm) ............... 1.3386-1.3465 (34.000-34.200)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.2736-0.2742 (6.950-6.965)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.2728-0.2734 (6.930-6.945)
Valve Guide Inner Diameter, in (mm) ............... 0.2756-0.2764 (7.000-7.020)
Intake Valve Stem-to-Guide Clearance, in (mm) ............... 0.0014-0.0028 (0.035-0.070)
Exhaust Valve Stem-to-Guide Clearance, in (mm) ............... 0.0022-0.0035 (0.055-0.090)
Valve Seat Angle, deg ............... 45
Valve Face Angle, deg ............... 44.5
Valve Spring Free Length, in (mm) ............... 1.9685 (50.00)
Camshaft Journal Diameter, in (mm) ............... 1.3382-1.3389 (33.990-34.010)
Camshaft Bearing Oil Clearance, in (mm) ............... 0.0016-0.0031 (0.040-0.080)
Camshaft End Play, in (mm) ............... 0.0020-0.0059 (0.050-0.150)
Cam Lobe Height (Intake), in (mm) ............... 1.6240-1.6279 (41.250-41.350)
Cam Lobe Height (Exhaust), in (mm) ............... 1.6378-1.6417 (41.600-41.700)

Tightening Torques

Cylinder Head Bolt (Stage 1), lb-ft (Nm) ............... 22.1 (30)
Cylinder Head Bolt (Stage 2), lb-ft (Nm) ............... 59.0 (80)
Cylinder Head Bolt (Stage 3), lb-ft (Nm) ............... 110.6 (150) + 180 deg rotation
Main Bearing Cap Bolt, lb-ft (Nm) ............... 95.8 (130) + 180 deg rotation
Connecting Rod Cap Bolt, lb-ft (Nm) ............... 47.9 (65) + 90 deg rotation
Flywheel Mounting Bolt, lb-ft (Nm) ............... 73.7 (100)
Flywheel Housing Frame M10 Bolt, lb-ft (Nm) ............... 35.4 (48)
Flywheel Housing Frame M12 Bolt, lb-ft (Nm) ............... 62.7 (85)
Crankshaft Front Damper Bolt, lb-ft (Nm) ............... 81.1 (110) + 90 deg rotation
Camshaft Bearing Carrier Cap Bolt, lb-ft (Nm) ............... 18.4 (25)
Camshaft Sprocket Lock Bolt, lb-ft (Nm) ............... 70.1 (95)
Timing Gear Train Idler Gear Bolt, lb-ft (Nm) ............... 18.4 (25)
Valve Cover Casing Bolt, lb-ft (Nm) ............... 8.1 (11)
Oil Pan Sump Drain Plug, lb-ft (Nm) ............... 29.5 (40)
Oil Pan Mounting M8 Screw, lb-ft (Nm) ............... 17.7 (24)
Piston Cooling Oil Spray Jet Nozzle, lb-ft (Nm) ............... 11.1 (15)
Common Rail Fuel Pipe Delivery Line Nut, lb-ft (Nm) ............... 20.6 (28)
Fuel Injector Hold-Down Flange Bolt, lb-ft (Nm) ............... 22.1 (30)
High-Pressure Fuel Pump Gear Nut, lb-ft (Nm) ............... 59.0 (80)
High-Pressure Pump Body To Engine Block Bolt, lb-ft (Nm) ............... 24.3 (33)
Fuel Delivery Common Rail Assembly Bracket Bolt, lb-ft (Nm) ............... 16.2 (22)
Turbocharger Exhaust Inlet Flange Mounting Nut, lb-ft (Nm) ............... 33.2 (45)
Turbocharger Compressor Outlet V-Band Clamp, lb-ft (Nm) ............... 7.4 (10)
Exhaust Manifold Structural Attachment Nut, lb-ft (Nm) ............... 36.9 (50)
Freshwater Circulation Pump Body Bolt, lb-ft (Nm) ............... 17.7 (24)
Seawater Raw Water Pump Base Plate Bolt, lb-ft (Nm) ............... 16.2 (22)
Oil Cooler Housing Cover Shell Bolt, lb-ft (Nm) ............... 17.7 (24)
Oil Pump Assembly Face Bolt, lb-ft (Nm) ............... 17.7 (24)
Thermostat Housing Water Outlet Flange Screw, lb-ft (Nm) ............... 16.2 (22)
Alternator Pivot Support Bracket Anchor Bolt, lb-ft (Nm) ............... 35.4 (48)
Alternator Adjustment Tension Clamping Screw, lb-ft (Nm) ............... 17.7 (24)
Electric Starter Motor Flange Bolt, lb-ft (Nm) ............... 55.3 (75)
Engine Combustion Glow Plug, lb-ft (Nm) ............... 11.1 (15)
Exhaust Manifold Water Temperature Sensor, lb-ft (Nm) ............... 18.4 (25)
Coolant Temperature Electronic Sensor, lb-ft (Nm) ............... 16.2 (22)
Oil Pressure Sensor Switch, lb-ft (Nm) ............... 14.7 (20)
Crankshaft Flywheel Speed Sensor Mounting Bolt, lb-ft (Nm) ............... 7.4 (10)
Camshaft Position Hall Effect Reference Sensor Screw, lb-ft (Nm) ............... 7.4 (10)
Charge Air Boost Pressure Sensor, lb-ft (Nm) ............... 8.8 (12)
Flexible Engine Mount Rubber Damper Nut, lb-ft (Nm) ............... 147.5 (200)
Flexible Mount To Engine Cylinder Block Bolt, lb-ft (Nm) ............... 62.7 (85)
Marine Reverse Gear Input Shaft Flange Bolt, lb-ft (Nm) ............... 51.6 (70)
Sacrificial Zinc Anode Brass Core Hex Plug, lb-ft (Nm) ............... 22.1 (30)
Fuel System Intake Secondary Filter Screw, lb-ft (Nm) ............... 12.5 (17)

________________________________________________________________________________________

• Volvo Penta Engines Specs
  
• Volvo Penta D6-350 Specs
  
• Volvo Penta D6-370 Specs
  
• Volvo Penta D6-380 Specs
  
• Volvo Penta D6-400 Specs
  
• Volvo Penta D6-440 Specs
  
• Volvo Penta D6-480 Specs
  

______________________________________________________________________________________

________________________________________________________________________________________

_______________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________