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Deutz BF4M2011 Engine

The Deutz BF4M2011 is a multi-cylinder, four-stroke, inline diesel engine designed for heavy-duty industrial, agricultural, and construction applications. It features a compact design with an integrated cooling system, making it highly adaptable for installations with limited space. The engine utilizes an overhead valve configuration driven by a camshaft via pushrods and rocker arms. It is engineered for high durability, low exhaust emissions, and reliable cold-starting capabilities under demanding operational conditions.

The engine uses an overhead valve (OHV) arrangement with two valves per cylinder (one intake and one exhaust). The valves are positioned vertically in the cylinder head. They are actuated by a gear-driven camshaft located in the crankcase, utilizing tappets, pushrods, and rocker arms to control gas exchange. The cylinder bore diameter is exactly 94 mm (3.70 in). The piston stroke length is exactly 112 mm (4.41 in). This results in a total displacement of 3.11 liters across the four cylinders.

The fuel system is an electronic or mechanical unit injection system utilizing single-injection pumps (PLD system) for each individual cylinder. High-pressure fuel lines connect each dedicated injection pump to its respective multi-hole injection nozzle. Fuel is drawn from the supply tank by a mechanical fuel feed pump, passed through a primary filter and water separator, and delivered to the injection pumps. The system ensures precise injection timing and high atomization pressures to maximize fuel efficiency and minimize particulate formation.

The engine uses a forced-feed lubrication system pressurized by a gear-type oil pump driven directly by the crankshaft. Oil is drawn from the oil pan through a suction strainer and forced through a full-flow cartridge filter. A unique aspect of the 2011 series architecture is that the engine oil serves a dual purpose, functioning as both the lubricant for moving components and the primary thermal medium for the internal cooling circuits.

The BF4M2011 features an integrated oil-cooling system rather than a conventional water jacket. Engine oil is circulated through targeted passages around the cylinders and cylinder head to absorb combustion heat. The heated oil is then directed through an externally mounted, heavy-duty oil cooler cooled by an engine-driven fan. This eliminates the need for coolant fluids, water pumps, and external radiators, reducing cavitation and freezing risks.

General Technical Data

Engine Specifications

Engine Model ............... Deutz BF4M2011
Engine Type ............... 4-cycle 4-cylinder direct injection oil-cooled turbocharged diesel
Number of Cylinders ............... 4
Cylinder Arrangement ............... In-line vertical
Engine Bore, in (mm) ............... 3.70 (94.0)
Engine Stroke, in (mm) ............... 4.41 (112.0)
Displacement, cu.in (L) ............... 190 (3.11)
Rated Engine Power, hp (kW) ............... 87.0 (65.0)
Rated Engine Speed, rpm ............... 2800
Peak Torque, lb-ft (Nm) ............... 200 (270) at 1700 rpm
Minimum Idle Speed, rpm ............... 900
Maximum Idle Speed, rpm ............... 3000
Aspiration Type ............... Turbocharged
Compression Ratio ............... 19.0:1
Firing Order ............... 1-3-4-2
Cylinder Block Material ............... Cast iron
Cylinder Head Material ............... Cast iron
Combustion System ............... Direct injection with single injection pumps per cylinder
Direction of Rotation ............... Counter-clockwise looking at flywheel side
Number of Valves per Cylinder ............... 2 (1 intake, 1 exhaust)
Exhaust Gas Turbocharger ............... Integrated turbocharger with internal wastegate valve
Lubrication System Type ............... Full-pressure lubrication with integrated oil cooler
Oil Pump Type ............... Gear-driven rotary pump
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System Type ............... External oil-cooled or integrated oil cooling system
Cooling Fan Drive ............... V-belt driven
Air Cleaner Type ............... Dry type with safety cartridge
Starting System Type ............... Electric starter motor
Electrical System Voltage, V ............... 12 or 24
Alternator Output Capacity, A ............... 60-80

Fuel System

Fuel Injection Pump Type ............... Deutz single injection pumps (PF type unit pumps)
Injection Pump Drive ............... Driven directly by the engine camshaft
Fuel Injector Type ............... Multi-hole nozzle injector assemblies
Fuel Injection Pressure, psi (bar) ............... 3625.9-4351.1 (250.0-300.0)
Peak Injection Pressure, psi (bar) ............... 17404.5 (1200.0)
Fuel Feed Pump Type ............... Mechanical diaphragm or gear type pump plunger
Fuel Feed Pump Pressure, psi (bar) ............... 14.5-29.0 (1.0-2.0)
Fuel Filter Type ............... Spin-on primary cartridge type filter elements
Fuel Injection Timing, deg BTDC ............... 4-8
Governor Type ............... Mechanical centrifugal or optional electronic

Dimensions and Weight

Overall Length, in (mm) ............... 28.1 (710)
Overall Width, in (mm) ............... 21.5 (550)
Overall Height, in (mm) ............... 27.7 (705)
Dry Weight, lb (kg) ............... 530 (240)
Wet Weight, lb (kg) ............... 615 (280)

Maintenance Data

Service Information

Compression Pressure Range, psi (bar) ............... 348.0-406.1 (24.0-28.0)
Compression Difference Between Cylinders, psi (bar) ............... 43.5 (3.0)
Oil Pressure at Low Idle Speed, psi (bar) ............... 14.5 (1.0)
Oil Pressure at Rated Speed, psi (bar) ............... 43.5-58.0 (3.0-4.0)
Maximum Oil Temperature in Oil Pan, F (C) ............... 266 (130)
Intake Valve Clearance, in (mm) ............... 0.012-0.016 (0.30-0.40)
Exhaust Valve Clearance, in (mm) ............... 0.020-0.024 (0.50-0.60)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, 15W-40
API Service Classifications ......................... CH-4, CG-4, CI-4
Engine Oil Capacity (Minimum Mark), gal (L) ............... 2.0 (7.5)
Engine Oil Capacity (Maximum Mark), gal (L) ............... 3.3 (12.5)

Service Intervals

Change oil and filter ............... Every 500 hours
Replace fuel filters ............... Every 500 hours
Inspect air filter ............... Every 150 hours
Replace air filter ............... Every 1000 hours
Valve clearance adjustment ............... Every 1000 hours
Fuel system inspection ............... Every 1500 hours
Compression test ............... Every 2000 hours
Drain water separator ............... As required
Belt inspection ............... As required

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ................ 3.7008-3.7016 (94.000-94.020)
Crankshaft Journal Outside Diameter, in (mm) ................ 2.7543-2.7551 (69.960-69.980)
Crank Pin Outside Diameter, in (mm) ................ 2.1638-2.1646 (54.960-54.980)
Crankshaft End Play, in (mm) ................ 0.0039-0.0110 (0.100-0.280)
Intake Valve Stem Outside Diameter, in (mm) ................ 0.3138-0.3142 (7.970-7.980)
Exhaust Valve Stem Outside Diameter, in (mm) ................ 0.3130-0.3134 (7.950-7.960)
Intake Valve Guide Inside Diameter, in (mm) ................ 0.3150-0.3157 (8.000-8.018)
Exhaust Valve Guide Inside Diameter, in (mm) ................ 0.3150-0.3157 (8.000-8.018)
Intake Valve Stem to Guide Clearance, in (mm) ................ 0.0008-0.0019 (0.020-0.048)
Exhaust Valve Stem to Guide Clearance, in (mm) ................ 0.0016-0.0027 (0.040-0.068)
Intake Valve Spring Free Length, in (mm) ................ 1.8898 (48.00)
Exhaust Valve Spring Free Length, in (mm) ................ 1.8898 (48.00)
Intake Cam Height, in (mm) ................ 1.8701-1.8740 (47.50-47.60)
Exhaust Cam Height, in (mm) ................ 1.8701-1.8740 (47.50-47.60)
Piston Pin Outside Diameter, in (mm) ................ 1.1811-1.1813 (30.000-30.005)
Piston Pin to Piston Bore Clearance, in (mm) ................ 0.0002-0.0006 (0.005-0.015)
Top Ring Side Clearance, in (mm) ................ 0.0024-0.0035 (0.060-0.090)
Second Ring Side Clearance, in (mm) ................ 0.0016-0.0028 (0.040-0.070)
Oil Ring Side Clearance, in (mm) ................ 0.0012-0.0024 (0.030-0.060)
Top Ring End Gap, in (mm) ................ 0.0098-0.0157 (0.250-0.400)
Second Ring End Gap, in (mm) ................ 0.0118-0.0197 (0.300-0.500)
Oil Ring End Gap, in (mm) ................ 0.0098-0.0157 (0.250-0.400)

Tightening Torque Specs

Cylinder Head Bolt (Stage 1), lb-ft (Nm) ............... 22.1 (30.0)
Cylinder Head Bolt (Stage 2), lb-ft (Nm) ............... 59.0 (80.0)
Cylinder Head Bolt (Stage 3), lb-ft (Nm) ............... 118.0 (160.0)
Main Bearing Cap Fasteners, lb-ft (Nm) ............... 36.8 (50.0)
Connecting Rod Cap Bolts, lb-ft (Nm) ............... 22.1 (30.0)
Crankshaft Central Pulley Screw, lb-ft (Nm) ............... 29.5 (40.0)
Flywheel Mounting Bolts, lb-ft (Nm) ............... 22.1 (30.0)
Camshaft Timing Belt Gear Screw, lb-ft (Nm) ............... 15.4 (21.0)
Rocker Arm Shaft Lever Block Bolt, lb-ft (Nm) ............... 15.4 (21.0)
Valve Adjusting Screw Locknut Fastener, lb-ft (Nm) ............... 14.7 (20.0)
Fuel Injection Pump Clamping Bracket Bolts, lb-ft (Nm) ............... 22.1 (30.0)
Fuel Injector Hold-Down Clamp Flange Bolt, lb-ft (Nm) ............... 15.4 (21.0)
High Pressure Fuel Line Delivery Union Nuts, lb-ft (Nm) ............... 18.4 (25.0)
Fuel Feed Pump Mounting Flange Nuts, lb-ft (Nm) ............... 15.4 (21.0)
Exhaust Manifold Structural Mounting Nuts, lb-ft (Nm) ............... 18.4 (25.0)
Intake Manifold Air Channel Mounting Screws, lb-ft (Nm) ............... 6.6 (9.0)
Turbocharger Exhaust Inlet Flange Mounting Nuts, lb-ft (Nm) ............... 29.5 (40.0)
Oil Cooler Housing Core Retention Fasteners, lb-ft (Nm) ............... 15.4 (21.0)
Crankcase Timing Belt Cover Housing Bolts, lb-ft (Nm) ............... 15.4 (21.0)
Crankcase Housing Flywheel Side Cover Bolts, lb-ft (Nm) ............... 15.4 (21.0)
Starter Motor Frame Mounting Flange Bolts, lb-ft (Nm) ............... 59.0 (80.0)
Alternator Pivot Adjustment Lock Fastener Bolt, lb-ft (Nm) ............... 22.1 (30.0)
Cooling Fan Hub Drive Pulley Lock Screws, lb-ft (Nm) ............... 18.4 (25.0)
Crankcase Ventilation Pressure Regulator Screw, lb-ft (Nm) ............... 6.6 (9.0)
Camshaft Belt Tensioner Idle Roller Bolt, lb-ft (Nm) ............... 33.1 (45.0)
Thermostat Housing Cover Retaining Screws, lb-ft (Nm) ............... 15.4 (21.0)

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• Deutz Engines Specs
  
• Deutz BF3L2011 Specs
  
• Deutz BF3M2011 Specs
  
• Deutz BF4L2011 Specs
  
• Deutz F3M2011 Specs
  
• Deutz F4M2011 Specs
  

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