________________________________________________________________________________

Deutz BF4L2011 Engine

The Deutz BF4L2011 is a multi-cylinder, four-stroke, inline diesel engine utilizing an integrated cooling system. Engineered for highly demanding industrial, construction, and agricultural applications, this model combines a compact footprint with exceptional power density. The defining characteristic of the 2011 series is its innovative internal cooling layout, which minimizes external plumbing, reduces mechanical noise, and ensures high thermal stability under continuous heavy loads. Equipped with a turbocharger, this engine delivers optimized combustion efficiency and high torque output across a wide operational RPM range.

The engine uses an overhead valve layout with two valves per cylinder (one intake and one exhaust). Valves are positioned vertically in the cylinder head and are actuated by a gear-driven camshaft located in the crankcase. The mechanical motion is transferred via solid pushrods and rocker arm assemblies. The internal cylinder dimensions consist of a bore of 94 mm and a stroke of 112 mm. This configuration results in a total displacement of 3.11 liters across the four inline cylinders.

uel delivery is managed by a mechanical Deutz unit pump system. Each individual cylinder features its own dedicated high-pressure injection pump driven directly by the main engine camshaft. Short, equal-length high-pressure fuel lines connect each unit pump to its corresponding multi-hole injection nozzle. The system includes a mechanical centrifugal governor to maintain engine speed under varying loads, a primary fuel feed pump, and a spin-on fuel filter cartridge with an integrated water separator to protect the precision injection components from contamination.

Lubrication is managed via a forced-feed circulation system driven by a gear-type oil pump integrated directly into the crankcase gear train. The engine utilizes an oil-jacket cooling concept, meaning the engine lubricating oil doubles as the primary thermal transfer fluid for the internal cooling circuits. The system includes a full-flow spin-on oil filter cartridge, an integrated high-capacity oil cooler, and dedicated piston-cooling nozzles that spray oil directly onto the undersides of the piston crowns to control combustion temperatures.

The BF4L2011 features a specialized, integrated oil-cooling system rather than a traditional external liquid water jacket. The internal cooling channels surrounding the cylinder liners and the cylinder head are supplied directly with the engine's lubricating oil, circulated by the internal oil pump. Heat dissipation is completed via an engine-mounted block radiator or an external heat exchanger through which air is forced by a belt-driven cooling fan. This design eliminates the risk of freezing, boiling, or cavitation corrosion associated with water-glycol mixtures.

General Technical Data

Engine Specifications

Engine Model ............... Deutz BF4L2011
Engine Type ............... 4-cycle inline 4-cylinder turbocharged 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 (3.11)
Aspiration Type ............... Turbocharged
Rated Engine Power, hp (kW) ............... 80.0 (59.5)
Rated Engine Speed, rpm ............... 2800
Peak Torque, lb-ft (Nm) ............... 177 (240.0)
Peak Torque Speed, rpm ............... 1600
Minimum Idle Speed, rpm ............... 900
Maximum Idle Speed, rpm ............... 3000
Compression Ratio ............... 18.5:1
Firing Order ............... 1-3-4-2
Direction of Rotation ............... Counter-clockwise viewed at flywheel side
Cylinder Block Material ............... High-strength cast iron
Cylinder Head Material ............... Cast iron integrated structure
Crankcase Design ............... Deep-skirt mono-block
Combustion System ............... Direct injection with single injection pumps
Cooling System Type ............... Integrated oil-cooling system
Cooling Medium ............... Engine lubricating oil
Lubrication System ............... Forced-feed full-pressure loop
Oil Pump Type ............... Rotary gear pump driven by crankshaft gear
Oil Filter Type ............... Full-flow spin-on cartridge
Air Cleaner Type ............... Dry-type multi-stage element with restriction indicator
Starting System ............... Electric starter motor
Electrical System Voltage, V ............... 12 or 24
Alternator Output, A ............... 60-95

Fuel System

Fuel Injection Pump Type ............... Integrated single unit injection pumps
Number of Injection Pumps ............... 4 individual pumps embedded in block
Fuel Injection Pump Drive ............... Camshaft-driven via roller tappets
Fuel Injection Injector Type ............... Multi-hole nozzle design
Fuel Injection Nozzle Holes ............... 5 micro-orifices
Injection Opening Pressure, psi (bar) ............... 3625 (250)
Operating Injection Pressure, psi (bar) ............... 4351-5076 (300-350)
Maximum Injection Pressure, psi (bar) ............... 14503 (1000)
Fuel Feed Pump Type ............... Mechanical diaphragm lift pump
Fuel Feed Pump Pressure, psi (bar) ............... 5.8-11.6 (0.4-0.8)
Fuel Filter Type ............... High-efficiency spin-on cartridge type
Fuel System Venting Method ............... Manual priming lever on feed pump
Fuel Injection Timing Advance, deg BTDC ............... 8-10
Governor Type ............... Mechanical centrifugal type

Dimensions and Weight

Overall Length, in (mm) ............... 25.5 (650)
Overall Width, in (mm) ............... 21.7 (550)
Overall Height, in (mm) ............... 27.5 (700)
Dry Weight without Cooling System, lb (kg) ............... 515 (235)
Wet Weight with Fluids filled, lb (kg) ............... 585 (265)

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) ............... 0.006-0.008 (0.15-0.20)
Exhaust Valve Clearance, in (mm) ............... 0.016-0.020 (0.40-0.50)

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 Level, qt (L) ............... 7.5 (7.0)
Engine Oil Capacity Maximum Level, qt (L) ............... 10.1 (9.5)
Oil Pan Capacity with Filter change, qt (L) ............... 11.6 (11.0)

Service Intervals

Change oil and filter ............... Every 500 hours
Replace fuel filters ............... Every 500 hours
Inspect air filter ............... Every 250 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) ................ 0.0039-0.0118 (0.100-0.300)
Intake Valve Stem Outside Diameter, in (mm) ................ 0.3134-0.3142 (7.960-7.980)
Exhaust Valve Stem Outside Diameter, in (mm) ................ 0.3126-0.3134 (7.940-7.960)
Intake Valve Guide Inside Diameter, in (mm) ................ 0.3157-0.3165 (8.020-8.040)
Exhaust Valve Guide Inside Diameter, in (mm) ................ 0.3157-0.3165 (8.020-8.040)
Intake Valve Stem to Guide Clearance, in (mm) ................ 0.0016-0.0031 (0.040-0.080)
Exhaust Valve Stem to Guide Clearance, in (mm) ................ 0.0024-0.0039 (0.060-0.100)
Intake Valve Spring Free Length, in (mm) ................ 1.8504 (47.000)
Exhaust Valve Spring Free Length, in (mm) ................ 1.8504 (47.000)
Intake Cam Height, in (mm) ................ 1.8740-1.8819 (47.600-47.800)
Exhaust Cam Height, in (mm) ................ 1.8740-1.8819 (47.600-47.800)
Piston Pin Outside Diameter, in (mm) ................ 1.1811-1.1815 (30.000-30.010)
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) ................ 0.0118-0.0197 (0.300-0.500)
Second Ring End Gap, in (mm) ................ 0.0118-0.0197 (0.300-0.500)
Oil Ring End Gap, in (mm) ................ 0.0098-0.0177 (0.250-0.450)

Tightening Torque Specs

Cylinder Head Bolts (Stage 1), lb-ft (Nm) ............... 22.1 (30.0)
Cylinder Head Bolts (Stage 2), lb-ft (Nm) ............... 59.0 (80.0)
Cylinder Head Bolts (Stage 3), lb-ft (Nm) ............... 118.0 (160.0)
Main Bearing Cap Retaining Bolts, lb-ft (Nm) ............... 36.8 (50.0)
Connecting Rod Bearing Cap Bolts, lb-ft (Nm) ............... 22.1 (30.0)
Flywheel Mounting Retaining Screws (Stage 1), lb-ft (Nm) ............... 22.1 (30.0)
Flywheel Mounting Retaining Screws (Stage 2), lb-ft (Nm) ............... 44.2 (60.0)
Balance Weight Crankshaft Mass Screws, lb-ft (Nm) ............... 33.1 (45.0)
Crankshaft Central Timing Belt Pulley Bolt, lb-ft (Nm) ............... 29.5 (40.0)
Camshaft Gear Center Retaining Screw, lb-ft (Nm) ............... 22.1 (30.0)
Rocker Shaft Support Bracket Mounting Screws, lb-ft (Nm) ............... 16.2 (22.0)
Valve Cover Retaining Acorn Nuts, lb-ft (Nm) ............... 6.6 (9.0)
Oil Pan Cast Aluminum Drain Plug Screw, lb-ft (Nm) ............... 36.8 (50.0)
Fuel Injection Pump Unit Clamp Console Bolts, lb-ft (Nm) ............... 22.1 (30.0)
Fuel High-Pressure Line Union Nuts Connection, lb-ft (Nm) ............... 18.4 (25.0)
Fuel Injection Injector Bracket Retaining Bolt, lb-ft (Nm) ............... 15.4 (21.0)
Exhaust Manifold Flange Fastening Nuts, lb-ft (Nm) ............... 16.2 (22.0)
Intake Manifold Flange Fastening Bolts, lb-ft (Nm) ............... 18.4 (25.0)
Turbocharger Housing Mounting Oil Line Inlet Pipe Bolt, lb-ft (Nm) ............... 21.3 (29.0)
Turbocharger Housing to Exhaust Flange Nuts, lb-ft (Nm) ............... 29.5 (40.0)
Oil Pressure Sensor Indicator Switch Engine Block, lb-ft (Nm) ............... 22.1 (30.0)
Cooling Fan Hub Central Mounting Screw, lb-ft (Nm) ............... 31.7 (43.0)
Alternator Swivel Arm Adjustment Pivot Bolt, lb-ft (Nm) ............... 22.1 (30.0)
Starter Motor Mounting Hex Flange Bolts, lb-ft (Nm) ............... 59.0 (80.0)
Crankcase Breather Valve Retaining Screws, lb-ft (Nm) ............... 7.3 (10.0)
Timing Belt Tensioner Roller Locking Nut, lb-ft (Nm) ............... 18.4 (25.0)
Front Crankshaft Radial Oil Seal Carrier Housing Bolts, lb-ft (Nm) ............... 7.3 (10.0)
Rear Crankshaft Oil Seal Carrier Retaining Screws, lb-ft (Nm) ............... 8.1 (11.0)
Fuel Lift Feed Pump Mounting Screws, lb-ft (Nm) ............... 11.0 (15.0)

________________________________________________________________________________________

• Deutz Engines Specs
  
• Deutz BF3L2011 Specs
  
• Deutz BF3M2011 Specs
  
• Deutz BF4M2011 Specs
  
• Deutz F3M2011 Specs
  
• Deutz F4M2011 Specs
  

________________________________________________________________________________

________________________________________________________________________________________

_______________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________