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Deutz BF4M1011 Engine

The Deutz BF4M1011 is a heavy-duty, 4-cylinder, turbocharged, inline diesel engine engineered primarily for construction, industrial, and agricultural machinery. It is highly regarded for its compact design, low noise footprint, and acoustically optimized crankcase. A defining characteristic of this engine family is its unique integrated single-fluid system, which utilizes engine lubrication oil for both mechanical component lubrication and thermal management. This design eliminates traditional external water jackets, drastically minimizing issues related to corrosion, scale buildup, and cavitation.

Valve Design: Overhead valve layout (OHV) driven by a block-mounted camshaft via pushrods and rocker arms. Valve Configuration: 2 valves per cylinder, configured as 1 intake valve and 1 exhaust valve. Valve Adjustment: Mechanical solid lifters requiring routine clearance adjustment via adjusting screws on the rocker arms. Cylinder Bore: 91 mm. Piston Stroke: 112 mm. Total Displacement: 2.92 liters (2912 cc).

Fuel System Injection Type: Direct fuel injection (DI) into the piston crown bowl for optimized combustion and reduced thermal stress. Pump Configuration: Utilizes an advanced single-pump system consisting of individual high-pressure unit injection pumps (PF pumps) dedicated to each cylinder, driven directly by the main engine camshaft. Regulation: Mechanical centrifugal flyweight governor or optional electronic governor managing fuel delivery via a common control rack.

Lubrication System Type: Forced-feed lubrication circuit powered by a high-efficiency rotary oil pump driven directly by the crankshaft. Filtration: Full-flow spin-on cartridge filter element with an integrated bypass valve. Intervals: Extended oil change capacities allow service intervals up to 1,000 operational hours when using authorized high-grade lubricants.

Cooling System: Fully oil-cooled configuration. Operation: The engine block lacks water jackets. Internal engine oil is continuously circulated through critical thermal zones: specifically around the cylinder walls and head combustion surfaces. Heat Dissipation: Hot oil is forced through an integrated or externally mounted heavy-duty oil cooler radiator where airflow from the engine fan extracts the thermal energy.

General Technical Data

Engine Specifications

Engine Model ............... Deutz BF4M1011
Engine Type ............... 4-cycle inline 4-cylinder turbocharged oil-cooled diesel
Number of Cylinders ............... 4
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.58 (91.0)
Engine Stroke, in (mm) ............... 4.41 (112.0)
Displacement, cu.in (L) ............... 177.5 (2.91)
Rated Engine Power, hp (kW) ............... 75-82 (56-61)
Rated Engine Speed, rpm ............... 2200-2800
Peak Torque ............... 203 Nm (150 lb-ft) at 1800 rpm
Idle Speed ............... 650-700 rpm
Aspiration Type ............... Turbocharged
Operating Speed ............... 2500 rpm
Compression Ratio ............... 17.0:1
Firing Order ............... 1-3-4-2
Cylinder Block Type ............... Cast iron
Cylinder Head Type ............... Cast iron
Lubrication System ............... Full-pressure
Oil Pump Type ............... Gear-driven
Oil Filter Type ............... Full-flow, spin-on
Cooling System ............... Oil-cooled
Air Cleaner Type ............... Dry dual-stage
Starting System ............... Electric starter
Electrical System ............... 12V or 24V
Alternator Rating, Amps ............... 35-65

Fuel System

Fuel System ............... Mechanical unit injection
Injection System ............... High-pressure Pump-Line-Nozzle (PLN)
Injection Pump Type ............... Mechanical
Injection Timing ............... Variable
Injection Pressure ............... 230-240 bar
Fuel Type ............... Diesel

Dimensions and Weight

Overall Length, in (mm) ............... 27.9 (710)
Overall Width, in (mm) ............... 19.7 (500)
Overall Height, in (mm) ............... 27.5 (700)
Dry Weight, lbs (kg) ............... 550-615 (250-280)

Maintenance Data

Service Information

Minimum Oil Pressure (1800 rpm) ............... 2.2 Bar (32 psi)
Minimum Oil Pressure (Low Idle, 900 rpm) ............... 1.4 Bar (20 psi)
Maximum System Pressure (Cold Start) ............... 3.0 Bar (43 psi)
Intake Valve Clearance, in (mm) ............... 0.007-0.009 (0.17-0.23)
Exhaust Valve Clearance, in (mm) ............... 0.011-0.013 (0.27-0.33)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, 15W-40
API Service Classifications ......................... CI-4 or higher
Oil Capacity (Engine only), qts (L) .................. 9.5-10.0 (9.0-9.5)
Oil Capacity (Oil cooler), qts (L) .................. 3.7-4.2 (3.5-4.0)

Service Intervals

Change oil and filter ............... Every 250 hours
Replace fuel filters ............... Every 500 hours
Inspect air filter ............... Every 100 hours
Replace air filter ............... Every 500 hours
Valve clearance adjustment ............... Every 1000 hours
Fuel system inspection ............... Every 1500 hours
Compression test ............... Every 3000 hours
Drain water separator ............... As required
Belt inspection ............... As required

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ................ 3.5826 (91.00)
Crankshaft Journal Outside Diameter, in (mm) ................ 2.7559 (70.00)
Crank Pin Outside Diameter, in (mm) ................ 2.3622 (60.00)
Crankshaft End Play, in (mm) ................ 0.0039-0.0118 (0.10-0.30)
Intake Valve Stem Outside Diameter, in (mm) ................ 0.3141 (7.98)
Exhaust Valve Stem Outside Diameter, in (mm) ................ 0.3133 (7.96)
Intake Valve Guide Inside Diameter, in (mm) ................ 0.3149 (8.00)
Exhaust Valve Guide Inside Diameter, in (mm) ................ 0.3149 (8.00)
Intake Valve Stem to Guide Clearance (Wear Limit), in (mm) ................ 0.0047 (0.12)
Exhaust Valve Stem to Guide Clearance (Wear Limit), in (mm) ................ 0.0059 (0.15)
Intake Valve Spring Free Length, in (mm) ................ 1.8897 (48.00)
Exhaust Valve Spring Free Length, in (mm) ................ 1.8897 (48.00)
Intake Cam Height, in (mm) ................ 1.8818 (47.80)
Exhaust Cam Height, in (mm) ................ 1.8818 (47.80)
Piston Pin Outside Diameter, in (mm) ................ 1.1811 (30.00)
Piston Pin to Piston Bore Clearance, in (mm) ................ 0.00015-0.00047 (0.004-0.012)
Top Ring Side Clearance, in (mm) ................ 0.0035-0.0047 (0.09-0.12)
Second Ring Side Clearance, in (mm) ................ 0.0023-0.0035 (0.06-0.09)
Oil Ring Side Clearance, in (mm) ................ 0.0015-0.0027 (0.04-0.07)
Top Ring End Gap (Wear Limit), in (mm) ................ 0.0315 (0.80)
Second Ring End Gap (Wear Limit), in (mm) ................ 0.0708 (1.80)
Oil Ring End Gap (Wear Limit), in (mm) ................ 0.0354 (0.90)

Tightening Torque Specs

Cylinder Head Bolts (Step 1) ................ 60 Nm (44 lb-ft)
Cylinder Head Bolts (Step 2) ................ 120 Nm (89 lb-ft)
Crankshaft Damper Pulley Bolt ................ 250-270 Nm (184-199 lb-ft)
Connecting Rod Cap Bolts ................ 50-55 Nm (37-41 lb-ft)
Main Bearing Cap Bolts (Step 1) ................ 80 Nm (59 lb-ft)
Main Bearing Cap Bolts (Step 2) ................ 160 Nm (118 lb-ft)
Flywheel Bolts ................ 80-90 Nm (59-66 lb-ft)
Camshaft Drive Gear Bolt ................ 70-80 Nm (52-59 lb-ft)
Camshaft Bearing Cap Bolts ................ 20-25 Nm (15-18 lb-ft)
Rocker Arm Shaft Mounting Bolts ................ 25-30 Nm (18-22 lb-ft)
Valve Cover Bolts ................ 8-10 Nm (6-7 lb-ft)
Intake Manifold Bolts ................ 20-25 Nm (15-18 lb-ft)
Exhaust Manifold Nuts ................ 30-35 Nm (22-26 lb-ft)
Turbocharger Mounting Nuts ................ 35-40 Nm (26-30 lb-ft)
Turbocharger Oil Feed Line ................ 20-25 Nm (15-18 lb-ft)
Oil Pan Bolts ................ 8-12 Nm (6-9 lb-ft)
Injection Pump Mounting Nuts ................ 20-25 Nm (15-18 lb-ft)
Injection Pump Drive Gear Nut ................ 60-70 Nm (44-52 lb-ft)
Fuel Injector Clamp Bolts ................ 25-30 Nm (18-22 lb-ft)
Glow Plugs ................ 20-25 Nm (15-18 lb-ft)
Water Pump Mounting Bolts ................ 20-25 Nm (15-18 lb-ft)
Thermostat Housing Bolts ................ 8-12 Nm (6-9 lb-ft)
Starter Motor Mounting Bolts ................ 35-40 Nm (26-30 lb-ft)
Alternator Mounting Bracket Bolts ................ 25-30 Nm (18-22 lb-ft)
Engine Mounts (to block) ................ 50-60 Nm (37-44 lb-ft)

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• Deutz Engines Specs
  
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• Deutz BF4M1011F Specs
  
• Deutz F4M1011F Specs
  

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