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Deutz F4M2011 Engine

The Deutz F4M2011 is a non-turbocharged, naturally aspirated, 4-cylinder, in-line diesel engine designed for industrial, construction, and agricultural applications. It features a highly efficient integrated cooling system and a compact design, making it highly reliable in demanding operating environments. The engine relies on an overhead valve configuration driven by a maintenance-free timing belt and utilizes a unique oil-cooling method where the engine's lubricating oil also serves as the primary thermal management fluid.

The engine utilizes an overhead valve (OHV) arrangement. It features 2 valves per cylinder, consisting of 1 intake valve and 1 exhaust valve. The valves are actuated by a cylinder-block-mounted camshaft via pushrods and rocker arms. Valve clearance adjustments are performed mechanically via adjusting screws on the rocker arms. Cylinder Bore: 94.0 mm (3.70 inches). Piston Stroke: 112.0 mm (4.41 inches). Total Displacement: 3.11 liters (189.8 cubic inches).

The fuel system relies on a mechanical direct injection configuration. It utilizes individual injection pumps (Deutz single injection pumps or unit pumps) for each cylinder, integrated directly into the engine block and driven by the camshaft. Fuel is delivered from the tank via a mechanical fuel transfer pump through a primary fuel filter/water separator. The unit pumps generate high pressure to deliver fuel through short, equal-length high-pressure fuel lines to multi-hole mechanical fuel injectors located in the cylinder head, ensuring precise atomization directly into the combustion chamber. Speed regulation is managed by a mechanical centrifugal governor.

The engine features a forced-feed lubrication system pressurized by a gear-type oil pump driven directly from the crankshaft. This system is dual-purpose: it lubricates all moving internal components (crankshaft bearings, camshaft, valve train) and acts as the internal cooling medium for the cylinder liners and cylinder heads. It includes a spin-on full-flow oil filter cartridge and an integrated oil cooler.

The F4M2011 uses an integrated oil-cooling system, often referred to as an air/oil-cooled layout. Unlike traditional water-cooled engines, there is no coolant jacket for water/glycol. Instead, the engine oil absorbs heat directly from the engine block and cylinder heads. This heated oil is then pumped through an external oil cooler radiator, which is cooled by a belt-driven cooling fan. This design eliminates cavitation, freezing, and boiling issues associated with liquid-cooled systems.

General Technical Data

Engine Specifications

Engine Model ............... Deutz F4M2011
Engine Type ............... 4-cycle inline 4-cylinder direct injection oil-cooled 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) ............... 189.8 (3.11)
Rated Engine Power, hp (kW) ............... 60-80 (45-60)
Rated Engine Speed, rpm ............... 2600
Peak Torque, lb-ft (Nm) ............... 125-162 (170-220) at 1700 rpm
Minimum Idle Speed, rpm ............... 850
Maximum Idle Speed, rpm ............... 2800
Aspiration Type ............... Naturally aspirated
Compression Ratio ............... 18.0:1
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) ............... 29.9 (760)
Overall Width, in (mm) ............... 21.7 (550)
Overall Height, in (mm) ............... 26.7 (680)
Dry Weight, lb (kg) ............... 505 (230)
Wet Weight, lb (kg) ............... 570 (260)

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) ............... 1.8 (7.0)
Engine Oil Capacity (Maximum Mark), gal (L) ............... 2.8 (10.5)

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)
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 BF4M2011 Specs
  
• Deutz F3M2011 Specs
  

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