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Deutz F4L1011F Engine

The Deutz F4L1011F is a heavy-duty, four-stroke, naturally aspirated diesel engine designed for industrial, agricultural, and construction equipment. Known for its compact footprint and reliable thermal efficiency, this engine features an integrated cooling system and high parts commonality with other models in the Deutz 1011 series. Its design prioritizes low emissions, minimal external plumbing, and a high power-to-weight ratio, making it a preferred choice for harsh operating environments.

This engine utilizes an overhead valve configuration driven by a camshaft located within the engine block. The camshaft operates the valves via pushrods and rocker arms. Each cylinder is equipped with two valves: one intake valve and one exhaust valve, positioned vertically in the cylinder head to optimize combustion efficiency. The engine is built with a displacement of 2.73 liters across four inline cylinders. The precise internal dimensions feature a cylinder bore of 91 mm and a piston stroke of 105 mm.

The fuel system relies on a high-pressure, direct-injection design utilizing individual injection pumps for each cylinder. A mechanical fuel transfer pump delivers diesel from the tank through a primary fuel filter and water separator to the injection pumps. These unit pumps are driven directly by the engine camshaft, ensuring precise timing. Fuel is delivered at high pressure to multi-hole injection nozzles centered in the combustion chambers, promoting complete fuel atomization and clean combustion. Speed regulation is handled by an integrated mechanical centrifugal governor.

Lubrication is managed by a force-feed, pressure circuit system driven by a gear-type oil pump. This pump circulates oil through a full-flow cartridge filter before distributing it to the main bearings, connecting rod bearings, and camshaft. A unique feature of this engine is that the engine oil is also utilized as a primary thermal transfer fluid for the internal cooling circuits, which requires high-quality, temperature-resistant lubricants.

The F4L1011F employs an integrated oil-cooling system rather than a traditional water jacket. The cylinder block and heads are cooled by circulating engine oil through internal passages and an externally mounted oil cooler. This eliminates the need for water pumps, radiators, coolant hoses, and anti-freeze, significantly reducing maintenance requirements and preventing common cooling system failures like cavitation or freezing.

General Technical Data

Engine Specifications

Engine Model ............... Deutz F4L1011F
Engine Type ............... 4-cycle inline 4-cylinder integrated air/oil-cooled diesel
Number of Cylinders ............... 4
Cylinder Arrangement ............... In-line vertical
Engine Bore, in (mm) ............... 3.58 (91.0)
Engine Stroke, in (mm) ............... 4.13 (105.0)
Displacement, cu.in (L) ............... 166.6 (2.732)
Maximum Rated Power, hp (kW) ............... 59.0 (44.0) at 3000 rpm
Maximum Rated Speed, rpm ............... 3000
Minimum Idle Speed, rpm ............... 900
Maximum Torque, lb-ft (Nm) ............... 140.1 (190.0) at 1800 rpm
Compression Ratio ............... 18.5:1
Firing Order ............... 1-3-4-2
Aspiration Type ............... Naturally aspirated
Direction of Rotation ............... Counter-clockwise looking onto flywheel
Combustion System ............... Direct injection
Cylinder Block Material ............... High-strength cast iron
Cylinder Head Material ............... Cast iron alloy
Crankshaft Material ............... Forged steel with induction hardened journals
Connecting Rod Material ............... Forged steel split-type
Lubrication System Type ............... Full-pressure lubrication with integrated oil cooler
Oil Pump Type ............... Rotary gear pump driven by crankshaft
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System Type ............... Integrated air-oil cooling system
Cooling Fan Type ............... Belt-driven axial blower fan
Air Cleaner Type ............... Dry type with primary and safety elements
Starting System Type ............... Electric starter motor
Electrical System Voltage, V ............... 12
Alternator Output Capacity, A ............... 60-80

Fuel System

Fuel Injection Pump Type ............... Single unit injection pumps integrated into cylinder block
Number of Injection Pumps ............... 4
Fuel Injection Pump Drive ............... Driven by internal camshaft lobes
Fuel Injection Valve Type ............... Multi-hole nozzle type
Fuel Injection Pressure, psi (bar) ............... 3625 (250)
Fuel Lift Pump Type ............... Mechanical diaphragm pump driven by camshaft
Fuel Lift Pump Pressure, psi (bar) ............... 4.35-7.25 (0.3-0.5)
Fuel Filter Type ............... Spin-on full-flow cartridge filter element
Governor Type ............... Mechanical centrifugal, integrated within the block assembly
Fuel Injection Timing Advance, deg BTDC ............... 12-14
Fuel Nozzle Opening Pressure (Min), psi (bar) ............... 3190.8 (220.0)

Dimensions and Weight

Overall Length, in (mm) ............... 28.1 (715.0)
Overall Width, in (mm) ............... 20.8 (530.0)
Overall Height, in (mm) ............... 26.6 (675.0)
Dry Weight without Starter or Alternator, lbs (kg) ............... 530 (240)
Wet Weight with All Operating Fluids, lbs (kg) ............... 570 (260)

Maintenance Data

Service Information

Compression Pressure Range, psi (bar) ............... 362.5-435.1 (25.0-30.0)
Compression Difference Between Cylinders, psi (bar) ............... 43.5 (3.0)
Oil Pressure at Low Idle Speed, psi (bar) ............... 11.6 (0.8)
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
Engine Oil Capacity with Filter (Minimum Std Pan), qt (L) ............... 6.34 (6.0)
Engine Oil Capacity with Filter (Maximum Std Pan), qt (L) ............... 11.1 (10.5)
Engine Oil Capacity with Filter (Industrial High Pan), qt (L) ............... 13.2 (12.5)

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 ................ 3.5827-3.5835 in (91.000-91.020 mm)
Crankshaft Journal Outside Diameter ................ 2.7485-2.7490 in (69.812-69.825 mm)
Crank Pin Outside Diameter ................ 2.4060-2.4065 in (61.112-61.125 mm)
Crankshaft End Play ................ 0.0039-0.0110 in (0.100-0.280 mm)
Intake Valve Stem Outside Diameter ................ 0.3142-0.3146 in (7.980-7.990 mm)
Exhaust Valve Stem Outside Diameter ................ 0.3134-0.3138 in (7.960-7.970 mm)
Intake Valve Guide Inside Diameter ................ 0.3157-0.3165 in (8.020-8.040 mm)
Exhaust Valve Guide Inside Diameter ................ 0.3157-0.3165 in (8.020-8.040 mm)
Intake Valve Stem to Guide Clearance ................ 0.0012-0.0024 in (0.030-0.060 mm)
Exhaust Valve Stem to Guide Clearance ................ 0.0020-0.0031 in (0.050-0.080 mm)
Intake Valve Spring Free Length ................ 1.8898 in (48.00 mm)
Exhaust Valve Spring Free Length ................ 1.8898 in (48.00 mm)
Intake Cam Height ................ 1.8701-1.8740 in (47.500-47.600 mm)
Exhaust Cam Height ................ 1.8701-1.8740 in (47.500-47.600 mm)
Piston Pin Outside Diameter ................ 1.0236-1.0240 in (26.000-26.010 mm)
Piston Pin to Piston Bore Clearance ................ 0.0003-0.0007 in (0.008-0.018 mm)
Top Ring Side Clearance ................ 0.0024-0.0035 in (0.060-0.090 mm)
Second Ring Side Clearance ................ 0.0016-0.0028 in (0.040-0.070 mm)
Oil Ring Side Clearance ................ 0.0012-0.0024 in (0.030-0.060 mm)
Top Ring End Gap ................ 0.0098-0.0157 in (0.250-0.400 mm)
Second Ring End Gap ................ 0.0118-0.0177 in (0.300-0.450 mm)
Oil Ring End Gap ................ 0.0098-0.0157 in (0.250-0.400 mm)

Tightening Torque Specs

Cylinder Head Bolts (M12), Stage 1 ................ 25 Nm (18 lb-ft)
Cylinder Head Bolts (M12), Stage 2 ................ 50 Nm (37 lb-ft)
Cylinder Head Bolts (M12), Stage 3 ................ 80 Nm (59 lb-ft)
Cylinder Head Bolts (M12), Stage 4 ................ 105-115 Nm (77-85 lb-ft)
Main Bearing Cap Bolts (M12) ................ 60-65 Nm (44-48 lb-ft)
Connecting Rod Cap Bolts (M10) ................ 40-45 Nm (30-33 lb-ft)
Camshaft Bearing Cap Bolts (M8) ................ 20-25 Nm (15-18 lb-ft)
Flywheel Bolts (M10) ................ 35-40 Nm (26-30 lb-ft)
Crankshaft Pulley Bolt (M14) ................ 100-120 Nm (74-89 lb-ft)
Intake Manifold Nuts (M8) ................ 15-20 Nm (11-15 lb-ft)
Exhaust Manifold Nuts (M8) ................ 20-25 Nm (15-18 lb-ft)
Injector Hold-Down Clamp Bolts (M8) ................ 15-18 Nm (11-13 lb-ft)
Glow Plugs (M8) ................ 10-12 Nm (7-9 lb-ft)
Rocker Arm Shaft Bracket Bolts (M8) ................ 20-25 Nm (15-18 lb-ft)
Rocker Arm Adjuster Locknut (M6) ................ 8-10 Nm (6-7 lb-ft)
Valve Cover Nuts (M6) ................ 5-7 Nm (4-5 lb-ft)
Oil Pan Bolts (M6) ................ 8-10 Nm (6-7 lb-ft)
Oil Pump Mounting Bolts (M6) ................ 12-15 Nm (9-11 lb-ft)
Oil Cooler Mounting Bolts (M6) ................ 8-10 Nm (6-7 lb-ft)
Oil Filter Head Bolts (M8) ................ 15-18 Nm (11-13 lb-ft)
Fuel Injection Pump Mounting Nuts (M8) ................ 18-22 Nm (13-16 lb-ft).
Fuel Lift Pump Mounting Bolts (M6) ................ 8-10 Nm (6-7 lb-ft)
Engine Mount (Bracket to Block, M10) ................ 35-40 Nm (26-30 lb-ft)
Starter Motor Bolts (M10) ................ 30-35 Nm (22-26 lb-ft)

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• Deutz Engines Specs
  
• Deutz F2L1011 Specs
  
• Deutz F2L1011F Specs
  
• Deutz F3L1011F Specs
  
• Deutz F4L1011 Specs
  

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