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Volvo Penta MD11D Engine

General Technical Data

Engine Specifications

Engine Model ............... Volvo Penta MD11D
Engine Type ............... 4-cycle inline 2-cylinder direct injection liquid-cooled marine diesel
Number of Cylinders ............... 2
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.50 (88.9)
Engine Stroke, in (mm) ............... 3.54 (90.0)
Displacement, cu.in (L) ............... 68.3 (1.12)
Rated Engine Power, hp (kW) ............... 25 (18.4) at crankshaft
Rated Engine Speed, rpm ............... 3000
Peak Torque ............... 44.2 lb-ft (60.0 Nm) at 2100-2300 rpm
Idle Speed ............... 700-800 rpm
Aspiration Type ............... Naturally Aspirated
Operating Speed ............... 2500-3000 rpm
Compression Ratio ............... 21:1
Firing Order ............... 1-2
Cylinder Block Type ............... Cast iron
Cylinder Head Type ............... Cast iron, individual heads per cylinder
Lubrication System ............... Full-pressure lubrication
Oil Pump Type ............... Gear-driven
Oil Filter Type ............... Full-flow, spin-on
Cooling System ............... Thermostat-controlled sea-water or freshwater heat exchanger system
Water Pump Type ............... Belt-driven centrifugal pump or gear-driven neoprene impeller pump
Air Cleaner Type ............... Intake silencer with cleanable mesh element
Starting System ............... Electric Starter
Electrical System ............... 12V alternating current system
Alternator Output ............... 35A at 14V

Fuel System

Injection Pump Type ............... Bosch inline or individual plug-in injection pumps
Governor Type ............... Centrifugal mechanical governor
Fuel Injection Order ............... 1-2
Injection Timing, degrees BTDC ............... 25-28
Injector Type ............... Multi-hole nozzle type
Injector Opening Pressure, psi (MPa) ............... 2538-2683 (17.5-18.5)
Feed Pump Type ............... Mechanical diaphragm lift pump
Feed Pump Pressure, psi (kPa) ............... 7.1-10.0 (49.0-69.0)
Fuel Filter Type ............... Spin-on fine cartridge filter with water separator base
Fuel Line Material ............... High-pressure seamless steel piping
Fuel Return System ............... Leak-off line returning overflow to fuel filter or reservoir tank
Maximum Allowable Fuel Restriction, in Hg (mm Hg) ............... 3.94 (100.0)
Fuel Grade Recommendation ............... Autodiesel fuel standard commercial diesel

Dimensions and Weight

Overall Length, in (mm) ............... 28.8 (735)
Overall Width, in (mm) ............... 23.7 (600)
Overall Height, in (mm) ............... 20.1 (510)
Dry Weight, lb (kg) ............... 520 (236)
Weight with MS2 Reverse Gear, lb (kg) ............... 564 (256)
Weight with 120S Sailboat Drive, lb (kg) ............... 573 (260)

Maintenance Data

Service Information

Compression Pressure, psi (bar) ............... 298.7-341.3 (20.6-23.5)
Oil Pressure at Rated Speed, psi (bar) ............... 21.3-35.5 (1.47-2.45)
Oil Pressure at Low Idle, psi (bar) ............... 11.4 (0.78)
Thermostat Opening Temperature, F (C) ............... 140 (60)
Thermostat Fully Open Temperature, F (C) ............... 167 (75)
Fresh Water Thermostat Opening, F (C) ............... 174 (79)
Fresh Water Thermostat Fully Open, F (C) ............... 197 (92)
Alternator Drive Belt Deflection, in (mm) ............... 0.39 (10.0)
Intake Valve Clearance, Cold, in (mm) ............... 0.012 (0.30)
Exhaust Valve Clearance, Cold, in (mm) ............... 0.014 (0.35)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 30
API Service Classifications ......................... CD or higher
Engine Oil Capacity, qt (L) ............... 2.75 (2.6)
Engine Oil Capacity with Filter, qt (L) ............... 3.06 (2.9)
MS2 Reverse Gear Oil Capacity, qt (L) ............... 0.63 (0.6)
120S Sail Drive Oil Capacity, qt (L) ............... 2.21 (2.1)
Cooling System Capacity, qt (L) ............... 4.22 (4.0)

Service Intervals

Change engine oil ............... Every 50 hours
Change oil in reverse gear............... Every 50 hours
Replace oil filter ............... Every 100 hours
Service air filter ............... Every 50 hours
Inspect seawater cooling ............... Every 100 hours
Valve-lash adjustment ............... Every 100 hours
Check fuel system ............... Every 100 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 3.500-3.501 (88.900-88.915)
Cylinder Bore Maximum Wear Limit, in (mm) ............... 3.508 (89.100)
Crankshaft Main Journal Diameter, in (mm) ............... 2.124-2.125 (53.965-53.980)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0016-0.0036 (0.041-0.091)
Connecting Rod Journal Diameter, in (mm) ............... 1.927-1.928 (48.965-48.980)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0014-0.0033 (0.035-0.083)
Crankshaft Axial End Play, in (mm) ............... 0.002-0.007 (0.050-0.180)
Piston Skirt Outer Diameter, in (mm) ............... 3.496-3.497 (88.800-88.820)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.003-0.004 (0.080-0.115)
Piston Pin Bore Inside Diameter, in (mm) ............... 1.102-1.103 (28.000-28.006)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0006-0.0013 (0.015-0.032)
Top Ring End Gap, in (mm) ............... 0.012-0.020 (0.300-0.500)
Second Ring End Gap, in (mm) ............... 0.012-0.020 (0.300-0.500)
Oil Ring End Gap, in (mm) ............... 0.010-0.018 (0.250-0.450)
Top Ring Groove Side Clearance, in (mm) ............... 0.002-0.003 (0.050-0.085)
Second Ring Groove Side Clearance, in (mm) ............... 0.002-0.003 (0.050-0.085)
Oil Ring Groove Side Clearance, in (mm) ............... 0.002-0.003 (0.050-0.085)
Cylinder Head Flatness Distortion, in (mm) ............... 0.004 (0.100)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.312-0.313 (7.925-7.940)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.311-0.312 (7.900-7.915)
Valve Guide Inside Diameter, in (mm) ............... 0.315-0.316 (8.000-8.022)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.006 (0.150)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.007 (0.180)
Valve Seat Angle, degrees ............... 45
Valve Face Angle, degrees ............... 44.5
Valve Head Depth, in (mm) ............... 0.028-0.039 (0.700-1.000)
Valve Spring Free Length, in (mm) ............... 1.791 (45.500)
Camshaft Journal Diameter, in (mm) ............... 1.651-1.652 (41.940-41.960)
Camshaft Bearing Clearance, in (mm) ............... 0.001-0.003 (0.025-0.075)
Intake Cam Lobes Height, in (mm) ............... 0.233 (5.920)
Exhaust Cam Lobes Height, in (mm) ............... 0.235 (5.980)
Idler Gear Shaft Outer Diameter, in (mm) ............... 1.259-1.260 (31.975-31.990)
Idler Gear Bushing Clearance, in (mm) ............... 0.001-0.003 (0.025-0.075)

Tightening Torques

Cylinder Head Nuts (First Stage), lb-ft (Nm) ............... 22.1 (30.0)
Cylinder Head Nuts (Second Stage), lb-ft (Nm) ............... 59.0 (80.0)
Cylinder Head Nuts (Final Stage), lb-ft (Nm) ............... 81.1 (110.0)
Connecting Rod Cap Bolts, lb-ft (Nm) ............... 47.9 (65.0)
Main Bearing Cap Nuts, lb-ft (Nm) ............... 59.0 (80.0)
Flywheel Retaining Center Nut, lb-ft (Nm) ............... 368.8 (500.0)
Crankshaft Front Pulley Bolt, lb-ft (Nm) ............... 51.6 (70.0)
Camshaft Thrust Plate Screws, lb-ft (Nm) ............... 17.7 (24.0)
Timing Gear Housing to Block Screws, lb-ft (Nm) ............... 17.7 (24.0)
Timing Camshaft Gear Center Nut, lb-ft (Nm) ............... 44.2 (60.0)
Timing Idler Gear Shaft Core Screw, lb-ft (Nm) ............... 25.8 (35.0)
Rocker Shaft Support Bracket Screws, lb-ft (Nm) ............... 29.5 (40.0)
Rocker Arm Valve Adjusting Locknuts, lb-ft (Nm) ............... 14.7 (20.0)
Cylinder Head Valve Rocker Cap Nuts, lb-ft (Nm) ............... 8.1 (11.0)
Fuel Injector Assembly Clamping Nuts, lb-ft (Nm) ............... 14.7 (20.0)
Fuel Pump to Block Mounting Nuts, lb-ft (Nm) ............... 17.7 (24.0)
Fuel Delivery Pressure Pipe Union Nuts, lb-ft (Nm) ............... 16.2 (22.0)
Fuel Injector Leak-off Banjo Bolt, lb-ft (Nm) ............... 8.8 (12.0)
Fuel Lift Feed Pump to Block Fasteners, lb-ft (Nm) ............... 17.7 (24.0)
Oil Pan Drain Plug, lb-ft (Nm) ............... 29.5 (40.0)
Oil Pan Flange Edge Screws, lb-ft (Nm) ............... 8.1 (11.0)
Oil Pressure Relief Valve Cap Screw, lb-ft (Nm) ............... 25.8 (35.0)
Oil Filter Threaded Center Connector, lb-ft (Nm) ............... 18.4 (25.0)
Oil Pressure Sensor Switch Unit, lb-ft (Nm) ............... 12.5 (17.0)
Sea Water Circulating Pump Housing Fasteners, lb-ft (Nm) ............... 17.7 (24.0)
Exhaust Manifold to Cylinder Head Nuts, lb-ft (Nm) ............... 17.7 (24.0)
Intake Silencer Duct Plenum Screws, lb-ft (Nm) ............... 7.4 (10.0)
Alternator Pivot Base Bolt Attachment, lb-ft (Nm) ............... 36.9 (50.0)
Alternator Tensioner Adjustment Bracket Screw, lb-ft (Nm) ............... 17.7 (24.0)
Electric Starter Motor Frame Clamping Bolts, lb-ft (Nm) ............... 36.9 (50.0)
Engine Support Mount Foot Base Fasteners, lb-ft (Nm) ............... 51.6 (70.0)
Flywheel Housing to Cylinder Block Screws, lb-ft (Nm) ............... 25.8 (35.0)
Decompression Mechanism Actuator Nuts, lb-ft (Nm) ............... 7.4 (10.0)
Governor Housing Enclosure Cover Capscrews, lb-ft (Nm) ............... 7.4 (10.0)
Crankcase Breather Separator Body Screws, lb-ft (Nm) ............... 7.4 (10.0)
Glow Plug Preheater Base, lb-ft (Nm) ............... 18.4 (25.0)
Water Temperature Gauge Sender Unit, lb-ft (Nm) ............... 14.7 (20.0)
Oil Pipe Feed Lines Rocker Arm Unions, lb-ft (Nm) ............... 11.1 (15.0)
Thermostat Housing Outlet Cap Screws, lb-ft (Nm) ............... 17.7 (24.0)
Raw Water Pump Impeller Cover Screws, lb-ft (Nm) ............... 4.4 (6.0)

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• Volvo Penta Engines Specs
  
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