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Deutz BF3L2011 Engine

The Deutz BF3L2011 is a 4-stroke, inline 3-cylinder diesel engine featuring an integrated oil cooling system. The defining engineering trait of the 2011 series is its unique cooling philosophy, which utilizes the engine's lubricating oil as the primary thermal management fluid. This eliminates the need for a traditional water jacket, radiator, and coolant hoses, greatly reducing external maintenance points and potential failure modes. The turbocharger provides excellent power-to-weight ratios and high torque altitude performance, making it highly suitable for compact industrial machinery operating under heavy loads.

The engine utilizes an overhead valve (OHV) arrangement with 2 valves per cylinder (1 intake and 1 exhaust), totaling 6 valves. The valves are actuated via pushrods and rocker arms driven by a single camshaft located within the engine block. Valve clearance adjustments are performed mechanically via adjustment screws on the rocker arms. The cylinder architecture features a bore of 94 mm and a stroke of 112 mm. Total displacement is 2.33 liters.

The fuel system uses a direct injection design with individual injection pumps (unit pumps) for each cylinder. The mechanical injection pumps are integrated directly into the engine block and are actuated by the main camshaft, ensuring precise timing. Fuel is drawn from the tank by a mechanical fuel feed pump, passed through a primary fuel filter/water separator, and delivered to the unit pumps. The pumps pressurize the fuel to high thresholds and deliver it to multi-hole mechanical fuel injectors located centrally in the cylinder head, ensuring optimal atomization and fuel economy. Engine speed regulation is managed via an integrated mechanical centrifugal governor.

The engine employs a forced-feed lubrication system driven by a gear-type oil pump. This system is critical because it doubles as the engine's cooling medium. Lubricating oil is circulated through a high-capacity internal or external oil cooler before being directed to the main bearings, connecting rod bearings, camshaft, and valve train. The oil system includes a spin-on full-flow oil filter element and an integrated pressure relief valve to maintain optimal operational oil pressure.

The BF3L2011 features an integrated oil-cooling system. The cylinder block and cylinder head are designed with internal galleries through which the engine oil flows to absorb thermal energy directly from the combustion zones. An external, engine-driven cooling fan forces air across the external oil cooler heat exchanger and over the finned exterior surfaces of the engine block to dissipate heat. This system eliminates the risks of cavitation, freezing, and boiling associated with water-cooled engines.

General Technical Data

Engine Specifications

Engine Model ............... Deutz BF3L2011
Engine Type ............... 4-cycle inline 3-cylinder turbocharged oil-cooled diesel
Number of Cylinders ............... 3
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) ............... 142.2 (2.33)
Aspiration Type ............... Turbocharged
Rated Engine Power, hp (kW) ............... 65.0 (48.5)
Rated Engine Speed, rpm ............... 2800
Peak Torque, lb-ft (Nm) ............... 140.1 (190.0)
Peak Torque Speed, rpm ............... 1600
Minimum Idle Speed, rpm ............... 900
Maximum Idle Speed, rpm ............... 3000
Compression Ratio ............... 17.5:1
Firing Order ............... 1-2-3
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 ............... 3 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) ............... 20.4 (520)
Overall Width, in (mm) ............... 17.7 (450)
Overall Height, in (mm) ............... 26.7 (680)
Dry Weight without Cooling System, lb (kg) ............... 470 (215)
Wet Weight with Fluids filled, lb (kg) ............... 495 (225)

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) ............... 6.34 (6.0)
Engine Oil Capacity Maximum Level, qt (L) ............... 9.0 (8.5)
Oil Pan Capacity with Filter change, qt (L) ............... 9.51 (9.0)
Cooling System Total Fluid Volume, qt (L) ............... 3.70 (3.5)

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)

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• Deutz Engines Specs
  
• Deutz BF3M2011 Specs
  
• Deutz BF4L2011 Specs
  
• Deutz BF4M2011 Specs
  
• Deutz F3M2011 Specs
  
• Deutz F4M2011 Specs
  

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