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Volvo Penta D11-725 Engine

General Technical Data

Engine Specifications

Engine Model ............... Volvo Penta D11-725
Engine Type ............... 4-stroke inline 6-cylinder direct injection marine diesel
Number of Cylinders ............... 6
Cylinder Arrangement ............... In-line
Engine Bore, mm (in) ............... 123.0 (4.84)
Engine Stroke, mm (in) ............... 152.0 (5.98)
Displacement, L (cu.in) ............... 10.84 (661.3)
Crankshaft Power at 1100 rpm, kW (hp) ............... 180 (245)
Crankshaft Power at 1300 rpm, kW (hp) ............... 302 (411)
Crankshaft Power at 1600 rpm, kW (hp) ............... 395 (537)
Crankshaft Power at 1900 rpm, kW (hp) ............... 465 (632)
Crankshaft Power at 2100 rpm, kW (hp) ............... 515 (700)
Crankshaft Power at 2300 rpm, kW (hp) ............... 533 (725)
Crankshaft Power at 2400 rpm, kW (hp) ............... 533 (725)
Crankshaft Power at 2500 rpm, kW (hp) ............... 533 (725)
Propeller Shaft Power at 1600 rpm, kW (hp) ............... 132 (177)
Propeller Shaft Power at 1900 rpm, kW (hp) ............... 223 (299)
Propeller Shaft Power at 2100 rpm, kW (hp) ............... 306 (410)
Propeller Shaft Power at 2300 rpm, kW (hp) ............... 413 (554)
Propeller Shaft Power at 2400 rpm, kW (hp) ............... 476 (638)
Propeller Shaft Power at 2500 rpm, kW (hp) ............... 533 (725)
Torque at 1100 rpm, Nm (lb-ft) ............... 1563 (1153)
Torque at 1300 rpm, Nm (lb-ft) ............... 2218 (1636)
Torque at 1600 rpm, Nm (lb-ft) ............... 2357 (1738)
Torque at 1900 rpm, Nm (lb-ft) ............... 2337 (1724)
Torque at 2100 rpm, Nm (lb-ft) ............... 2342 (1727)
Torque at 2300 rpm, Nm (lb-ft) ............... 2213 (1632)
Torque at 2400 rpm, Nm (lb-ft) ............... 2121 (1564)
Torque at 2500 rpm, Nm (lb-ft) ............... 2036 (1502)
Torque Range, rpm ............... 1600-2100
Low Idle Speed, rpm ............... 600
High Idle Speed, rpm ............... 2700
Aspiration Type ............... Twin-entry turbocharged with charge-air aftercooler
Injection System ............... Electronically controlled unit injectors
Compression Ratio ............... 16.5:1
Firing Order ............... 1-5-3-6-2-4
Direction of Crankshaft Rotation ............... Clockwise viewed from front
Cylinder Block Material ............... Rigid cast-iron
Cylinder Head Material ............... Single-piece cast-iron
Cylinder Liners Type ............... Replaceable wet type
Number of Valve per Cylinder ............... 4
Inlet Valves per Cylinder ............... 2
Exhaust Valves per Cylinder ............... 2
Camshaft Placement ............... Overhead camshaft
Crankshaft Material ............... Drop-forged steel inductions hardened
Piston Type ............... Monotherm structural steel or oil-cooled aluminum
Engine Control System Designation ............... EVC-E Electronic Vessel Control
Lubrication Method ............... Full-pressure circulation
Oil Filter Element Config ............... Two full-flow spin-on filters and one bypass filter
Cooling Method ............... Freshwater cooling with seawater heat exchanger
Emission Compliance ............... IMO NOx Tier II, EU RCD Stage II, US EPA Tier 3
Starting System ............... Electric starter motor
Electrical System ............... 24V
Alternator Capacity ............... 80A

Fuel System

Fuel Injection Principle ............... Electronic unit injectors dual-stage actuation
Unit Injector Model Designation ............... Delphi E3 electronic architecture
Low Pressure Fuel Feed Pump Type ............... Gear-driven fuel transfer pump
Fuel Feed Delivery Pressure at Low Idle, kPa (psi) ............... 350 (50.8)
Fuel Feed Delivery Pressure at Rated Speed, kPa (psi) ............... 400-550 (58.0-79.8)
Minimum Fuel Feed Pressure under Load, kPa (psi) ............... 400 (58.0)
Fuel Peak Injection Pressure, bar (psi) ............... 2000 (29008)
Governor Type ............... Electronic Vessel Control EMS2
Fuel Filter Construction ............... Primary spin-on canister with secondary separator
Primary Fuel Filter Micron Rating, microns ............... 10
Secondary Fuel Filter Micron Rating, microns ............... 3
Water Separator Assembly ............... Integrated bowl with electric water-in-fuel sensor
Water-in-Fuel Warning Threshold ............... Electronic signal trigger to EVC dash display
Recommended Fuel ............... ASTM-D975 1-D, ASTM-D975 2-D, EN 590, JIS KK 2204
Alternative Fuel ............... Hydrotreated Vegetable Oil HVO paraffinic renewable diesel
Fuel Supply Pipe Diameter, mm (in) ............... 12.0 (0.47)
Fuel Return Pipe Diameter, mm (in) ............... 10.0 (0.39)
Maximum Fuel Temperature in Fuel Rail, C (F) ............... 80 (176)
Fuel Consumption at 1600 rpm Propeller Load, L/h (gal/h) ............... 35.1 (9.3)
Fuel Consumption at 1900 rpm Propeller Load, L/h (gal/h) ............... 57.2 (15.1)
Fuel Consumption at 2100 rpm Propeller Load, L/h (gal/h) ............... 77.4 (20.4)
Fuel Consumption at 2300 rpm Propeller Load, L/h (gal/h) ............... 103.5 (27.3)
Fuel Consumption at 2400 rpm Propeller Load, L/h (gal/h) ............... 120.3 (31.8)
Fuel Consumption at 2500 rpm Propeller Load, L/h (gal/h) ............... 139.7 (36.9)
Unit Injector Pre-load Adjusting Angle ............... Turn adjusting screw 3-4 flats past zero clearance
Cylinder Head Fuel Gallery Material ............... Cast internally within engine structure

Dimensions and Weight

Overall Length, mm (in) ............... 1430 (56.3)
Overall Width, mm (in) ............... 1020 (40.1)
Overall Height, mm (in) ............... 1025 (40.3)
Dry Weight (Bobtail Config), kg (lbs) ............... 1145 (2525)
Wet Weight (Bobtail Config), kg (lbs) ............... 1215 (2680)

Maintenance Data

Service Information

Oil Pressure at 600 rpm, kPa (psi) ............... 250 (36.2)
Oil Pressure at 2500 rpm Rated, kPa (psi) ............... 350-500 (50.8-72.5)
Oil Pressure Relief Valve Setting, kPa (psi) ............... 550 (79.8)
Lubrication Oil Maximum Temperature, C (F) ............... 125 (257)
Thermostat Opening Start Point, C (F) ............... 73-77 (163.4-170.6)
Thermostat Full Open Point, C (F) ............... 86-88 (186.8-190.4)
Cooling System Expansion Tank Cap Pressure, kPa (psi) ............... 75 (10.9)
Inlet Valve Clearance, Cold, mm (in) ............... 0.30 (0.0118)
Exhaust Valve Clearance, Cold, mm (in) ............... 0.50 (0.0197)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40, VDS-4.5
API Service Classifications ......................... CK-4, CJ-4, CI-4
Engine Oil Capacity Including Filters, L (gal) ............... 38.0 (10.05)
Engine Oil Capacity Excluding Filters, L (gal) ............... 32.0 (8.45)
Cooling System Total Capacity, L (gal) ............... 46.0 (12.15)

Service Intervals

Change engine oil ............... Every 250 hours
Replace oil filter ............... Every 250 hours
Replace fuel filter ............... Every 250 hours
Service air filter ............... Every 250 hours
Replace air filter ............... Every 500 hours
Change coolant ............... Every 4000 hours
Valve-lash adjustment ............... Every 1000 hours
Replace pump impeller ............... Every 500 hours
Check fuel system ............... Every 1500 hours
Compression test ............... Every 1500 hours
Belt inspection ............... Every 250 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 4.840-4.841 (123.000-123.020)
Cylinder Bore Out-of-Round, mm (in) ............... 0.02 (0.0008)
Crankshaft Main Journal Diameter, mm (in) ............... 108.00 (4.2520)
Crankshaft Main Journal Out-of-Round Maximum, mm (in) ............... 0.01 (0.0004)
Crankshaft Main Bearing Clearance, mm (in) ............... 0.05-0.10 (0.0020-0.0039)
Connecting Rod Journal Diameter, mm (in) ............... 86.00 (3.3858)
Connecting Rod Bearing Clearance, mm (in) ............... 0.04-0.09 (0.0016-0.0035)
Crankshaft Main Bearing Shell Thickness, mm (in) ............... 2.45-2.46 (0.0965-0.0969)
Crankshaft Axial End Play, mm (in) ............... 0.10-0.35 (0.0039-0.0138)
Piston Skirt Outer Diameter, mm (in) ............... 122.88 (4.8378)
Piston to Cylinder Bore Clearance, mm (in) ............... 0.11-0.14 (0.0043-0.0055)
Piston Pin Outer Diameter, mm (in) ............... 54.00 (2.1260)
Piston Pin to Small End Bushing Clearance, mm (in) ............... 0.04-0.06 (0.0016-0.0024)
Top Ring Groove Clearance, mm (in) ............... 0.07-0.11 (0.0028-0.0043)
Second Ring Groove Clearance, mm (in) ............... 0.05-0.09 (0.0020-0.0035)
Oil Ring Groove Clearance, mm (in) ............... 0.03-0.07 (0.0012-0.0028)
Top Ring End Gap Clearance, mm (in) ............... 0.35-0.50 (0.0138-0.0197)
Second Ring End Gap Clearance, mm (in) ............... 0.60-0.80 (0.0236-0.0315)
Oil Ring End Gap Clearance, mm (in) ............... 0.30-0.55 (0.0118-0.0217)
Cylinder Head Flatness Deviation, Maximum, mm (in) ............... 0.10 (0.0039)
Cylinder Block Main Deck Flatness Deviation, mm (in) ............... 0.05 (0.0020)
Inlet Valve Total Length, mm (in) ............... 140.20 (5.5197)
Inlet Valve Stem Outer Diameter, mm (in) ............... 7.96 (0.3134)
Inlet Valve Guide Inner Diameter, mm (in) ............... 8.00 (0.3150)
Inlet Valve Stem to Guide Clearance, mm (in) ............... 0.03-0.06 (0.0012-0.0024)
Inlet Valve Face Angle ............... 29.5 degrees
Inlet Valve Seat Angle ............... 30.0 degrees
Exhaust Valve Total Length, mm (in) ............... 140.00 (5.5118)
Exhaust Valve Stem Outer Diameter, mm (in) ............... 7.94 (0.3126)
Exhaust Valve Guide Inner Diameter, mm (in) ............... 8.00 (0.3150)
Exhaust Valve Stem to Guide Clearance, mm (in) ............... 0.05-0.08 (0.0020-0.0031)
Exhaust Valve Face Angle ............... 44.5 degrees
Exhaust Valve Seat Angle ............... 45.0 degrees
Valve Spring Free Length, mm (in) ............... 67.50 (2.6575)
Camshaft Journal Bearing Diameter, mm (in) ............... 70.00 (2.7559)
Camshaft Bearing Clearance, mm (in) ............... 0.05-0.09 (0.0020-0.0035)
Camshaft Axial End Play, mm (in) ............... 0.10-0.25 (0.0039-0.0098)
Cam Lobe Height (Inlet), mm (in) ............... 61.50 (2.4213)
Cam Lobe Height (Exhaust), mm (in) ............... 62.10 (2.4449)
Rocker Arm Shaft Radial Clearance, mm (in) ............... 0.03-0.07 (0.0012-0.0028)

Tightening Torques

Cylinder Head Fastener (1-Stage), Nm (lb-ft) ............... 60 (44.3)
Cylinder Head Fastener (2-Stage), Nm (lb-ft) ............... 90 (66.4) + 180 deg turn
Main Bearing Cap Screws, Nm (lb-ft) ............... 150 (110.6) + 120 deg turn
Connecting Rod Cap Fasteners (1-Stage), Nm (lb-ft) ............... 30 (22.1)
Connecting Rod Cap Fasteners (2-Stage), Nm (lb-ft) ............... 60 (44.3) + 90 deg turn
Flywheel Retention Bolts, Nm (lb-ft) ............... 60 (44.3) + 120 deg turn
Flywheel Housing Fasteners, Nm (lb-ft) ............... 140 (103.3)
Crankshaft Front Pulley Fastener, Nm (lb-ft) ............... 90 (66.4) + 90 deg turn
Camshaft Bearing Cap Screws, Nm (lb-ft) ............... 25 (18.4) + 90 deg turn
Rocker Arm Shaft Attaching Screws, Nm (lb-ft) ............... 15 (11.1)
Unit Injector Clamp Retaining Fastener, Nm (lb-ft) ............... 20 (14.8)
Valve Cover Sealing Perimeter Stud Nuts, Nm (lb-ft) ............... 24 (17.7)
Exhaust Manifold Structural Holding Nuts, Nm (lb-ft) ............... 48 (35.4)
Turbocharger Oil Feed Line Connector Bolt, Nm (lb-ft) ............... 30 (22.1)
Turbocharger Oil Return Flange Screws, Nm (lb-ft) ............... 24 (17.7)
Turbocharger Assembly Mounting Flange Nuts, Nm (lb-ft) ............... 48 (35.4)
Oil Sump Perimeter Holding Bolts, Nm (lb-ft) ............... 24 (17.7)
Oil Sump Central Drain Plug, Nm (lb-ft) ............... 60 (44.3)
Piston Cooling Oil Jet Tube Attachment Screw, Nm (lb-ft) ............... 24 (17.7)
Oil Pump Assembly Base Mounting Screws, Nm (lb-ft) ............... 35 (25.8)
Oil Cooler Element Housing Screws, Nm (lb-ft) ............... 27 (19.9)
Water Pump Drive Housing Fasteners, Nm (lb-ft) ............... 48 (35.4)
Thermostat Outer Cover Stud Screws, Nm (lb-ft) ............... 24 (17.7)
Starter Motor Flange Mounting Bolts, Nm (lb-ft) ............... 80 (59.0)
Alternator Pivot Slider Bracket Bolt, Nm (lb-ft) ............... 50 (36.9)
Timing Gear Outer Cover Mounting Screw, Nm (lb-ft) ............... 24 (17.7)
Crankcase Timing Gear Hub Center Bolt, Nm (lb-ft) ............... 120 (88.5)
Camshaft Drive Gear Holding Plate Bolts, Nm (lb-ft) ............... 45 (33.2)
Fuel Feed Transfer Pump Mount Base Bolts, Nm (lb-ft) ............... 24 (17.7)
Primary Fuel Filter Housing Base Screws, Nm (lb-ft) ............... 24 (17.7)
Crankcase Ventilation Element Bolts, Nm (lb-ft) ............... 10 (7.4)
Air Intake Manifold Port Intake Face Bolts, Nm (lb-ft) ............... 24 (17.7)
Seawater Heat Exchanger Attaching Fasteners, Nm (lb-ft) ............... 24 (17.7)
Piston Cooling Oil Pressure Electronic Sensor, Nm (lb-ft) ............... 25 (18.4)
Main Gallery Oil Pressure Sensor, Nm (lb-ft) ............... 25 (18.4)
Coolant Temperature Control Circuit Sensor, Nm (lb-ft) ............... 22 (16.2)
Crankcase Pressure Electronic Diagnostic Sensor, Nm (lb-ft) ............... 15 (11.1)
Flywheel Speed Pickup Sensor Holding Screw, Nm (lb-ft) ............... 10 (7.4)
Camshaft Position Phase Sensor Mounting Screw, Nm (lb-ft) ............... 10 (7.4)
Boost Air Pressure Intake Manifold Sensor, Nm (lb-ft) ............... 12 (8.9)
Fuel Rail Pressure Diagnostic Monitoring Sensor, Nm (lb-ft) ............... 35 (25.8)
Water in Fuel Warning Sensor Base Ring, Nm (lb-ft) ............... 5 (3.7)
Engine Flexible Isolation Mounting Base Bolts, Nm (lb-ft) ............... 275 (202.8)

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