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Deutz BF4M1011F Engine

The Deutz BF4M1011F is a heavy-duty, 4-stroke, 4-cylinder inline diesel engine engineered primarily for mobile construction and agricultural machinery. It features an exhaust-gas turbocharger, an integrated oil-cooling mechanism, and an acoustically optimized cast-iron crankcase that significantly minimizes operational noise emissions. Built for high load acceptance, durability, and reliability, the engine utilizes a single-fluid system where engine oil serves both as the lubricant and the thermal cooling medium. This design prevents common cooling issues such as internal corrosion or cavitation.

Valve Configuration: Overhead valve (OHV) arrangement with layout featuring 2 valves per cylinder (8 valves total). The overhead valves are actuated by mechanical lifters, pushrods, and a rocker arm assembly driven by a gear-driven or belt-driven camshaft. Bore and Stroke: The cylinder bore measures 91 mm, paired with a piston stroke of 112 mm. Total engine displacement is measured at 2.91 liters.

Fuel System: Direct injection (DI) configuration featuring individual unit injection pumps (injection pumps dedicated to each cylinder). Fuel delivery is managed by a mechanical fuel feed pump routing diesel through a spin-on fuel filter bracket and high-pressure steel injection lines to the individual mechanical fuel injectors. The unit pumps are actuated via the internal camshaft to achieve precise timing and optimized combustion efficiency.

Lubrication System: Forced-feed lubrication circuit pressurized by a gear-type lubrication oil pump. The system utilizes a spin-on lube oil filter, oil lines, and oil return lines connected directly to the cast-iron oil pan. The dual-purpose oil charge flows under pressure to critical friction points including main bearings, connecting rod journals, and the rocker arm brackets.

Cooling System: Integrated fluid system utilizing the engine's lubrication oil charge as the core cooling element. The design bypasses the need for an external water pump or traditional anti-freeze agents. A dedicated engine-mounted oil cooler/heat exchanger and cooling fan dissipate heat directly from the thermal channels inside the cylinder block and cylinder head jacket.

General Technical Data

Engine Specifications

Engine Model ............... Deutz BF4M1011F
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) .................. 4.2-4.8 (4.0-4.5)

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)
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
  
• Deutz BF3M1011F Specs
  
• Deutz BF4L1011F Specs
  
• Deutz BF4L1011FT Specs
  
• Deutz BF4M1011 Specs
  
• Deutz F4M1011F Specs
  

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