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Deutz BF4M1012E Engine

The Deutz BF4M1012E is a modern, liquid-cooled, inline 4-cylinder diesel engine engineered primarily for construction and agricultural machinery. It features a compact monoblock design with a high grey cast iron crankcase and wet-type cylinder liners. The engine utilizes an integrated mechanical speed governor (with an optional electronic governor available) and a dedicated exhaust turbocharger to optimize high power density, reliability, and fuel efficiency under high-load conditions.

The cylinder head utilizes a conventional overhead valve (OHV) arrangement featuring two valves per cylinder (eight valves total). The system is controlled by a gear-driven, block-mounted steel camshaft and actuated mechanically through mechanical lifters (tappets), pushrods, and rocker arms. The total displacement of the 4-cylinder assembly is 3.192 liters, providing a displacement density of approximately 0.8 liters per cylinder. The internal geometry is defined by a cylinder bore diameter of 94 mm and a piston stroke length of 115 mm.

The fuel injection circuit consists of a high-pressure, fully mechanical unit-pump system developed in collaboration with Bosch. Rather than a centralized injection pump, each individual cylinder is equipped with its own dedicated single-injection pump driven directly by a corresponding cam profile on the main camshaft. This design routes pressurized fuel directly into the combustion chamber via multi-hole injection nozzles. Timing and fuel metering are regulated through a mechanical speed governor connected to the internal fueling rack, completely eliminating the need for electrical crankshaft or camshaft position sensors.

Forced-feed lubrication is driven by a gear-driven oil pump delivering oil through integrated internal passages. Structural heat management is augmented via dedicated internal oil spray nozzles that target the undersides of the three-ring aluminum pistons; select models feature pistons with specialized internal cooling channels. The circuit includes a spin-on full-flow lube oil filter cartridge and a system-integrated oil cooler.

The engine utilizes a closed-circuit liquid cooling layout that is thermostatically regulated. Coolant is circulated through the engine block via an integrated, belt-driven centrifugal water pump. Structural heat dissipation is supported by an engine-mounted pusher or suction cooling fan alongside an air-to-air charge-air cooler (intercooler) to optimize intake air density.

General Technical Data

Engine Specifications

Engine Model ............... Deutz BF4M1012E
Engine Type ............... 4-cycle inline 4-cylinder turbocharged liquid-cooled diesel
Number of Cylinders ............... 4
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.70 (94.0)
Engine Stroke, in (mm) ............... 4.53 (115.0)
Displacement, cu.in (L) ............... 194.6 (3.19)
Rated Engine Power, hp (kW) ............... 88 (65)
Rated Engine Speed, rpm ............... 2200-2600
Peak Torque ............... 298 Nm (220 lb-ft) at 1500 rpm
Idle Speed ............... 700-800 rpm
Aspiration Type ............... Turbocharged
Operating Speed ............... 2500 rpm
Compression Ratio ............... 17.5:1
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 ............... Liquid-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 ............... Unit Pump System
Injection System ............... High-pressure Pump-Line-Nozzle (PLN)
Injection Pump ............... Mechanical
Fuel Lift Pump ............... Integrated in V-belt tensioner
Injection Timing ............... 14 ± 1 deg BTDC
Injection Nozzle ............... Five-hole type
Fuel Type ............... Diesel

Dimensions and Weight

Overall Length, in (mm) ............... 29.6 (750)
Overall Width, in (mm) ............... 26.2 (665)
Overall Height, in (mm) ............... 29.2 (740)
Dry Weight, lbs (kg) ............... 725-880 (330-400)

Maintenance Data

Service Information

Minimum Oil Pressure (1800 rpm) ............... 2.5 Bar (36 psi)
Minimum Oil Pressure (Low Idle, 900 rpm) ............... 1.4 Bar (20 psi)
Maximum System Pressure (Cold Start) ............... 3.4 Bar (50 psi)
Intake Valve Clearance, in (mm) ............... 0.011-0.013 (0.27-0.33)
Exhaust Valve Clearance, in (mm) ............... 0.018-0.021 (0.47-0.53)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, 15W-40
API Service Classifications ......................... CF-4 or higher
Engine Oil Capacity, qts (L) .................. 10.5-11.0 (10.0-10.5)
Coolant Capacity, qts (L) .................. 5.5-5.8 (5.3-5.6)

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
Change coolant ............... 1000 hours or 2 years
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) ................ 3.7008 (94.00)
Crankshaft Journal Outside Diameter, in (mm) ................ 2.7559 (70.00)
Crank Pin Outside Diameter, in (mm) ................ 2.1654 (55.00)
Crankshaft End Play, in (mm) ................ 0.0039-0.0118 (0.10-0.30)
Intake Valve Stem Outside Diameter, in (mm) ................ 0.3142 (7.98)
Exhaust Valve Stem Outside Diameter, in (mm) ................ 0.3134 (7.96)
Intake Valve Guide Inside Diameter, in (mm) ................ 0.3150 (8.00)
Exhaust Valve Guide Inside Diameter, in (mm) ................ 0.3150 (8.00)
Intake Valve Stem to Guide Clearance, in (mm) ................ 0.0024 (0.06)
Exhaust Valve Stem to Guide Clearance, in (mm) ................ 0.0031 (0.08)
Intake Valve Spring Free Length, in (mm) ................ 2.3228 (59.00)
Exhaust Valve Spring Free Length, in (mm) ................ 2.3228 (59.00)
Intake Cam Height, in (mm) ................ 1.8819 (47.80)
Exhaust Cam Height, in (mm) ................ 1.8819 (47.80)
Piston Pin Outside Diameter, in (mm) ................ 1.3386 (34.00)
Piston Pin to Piston Bore Clearance, in (mm) ................ 0.0002-0.0005 (0.004-0.012)
Top Ring Side Clearance, in (mm) ................ 0.0035-0.0047 (0.09-0.12)
Second Ring Side Clearance, in (mm) ................ 0.0024-0.0035 (0.06-0.09)
Oil Ring Side Clearance, in (mm) ................ 0.0016-0.0028 (0.04-0.07)
Top Ring End Gap, in (mm) ................ 0.0315 (0.80)
Second Ring End Gap, in (mm) ................ 0.0709 (1.80)
Oil Ring End Gap, in (mm) ................ 0.0354 (0.90)

Tightening Torque Specs

Cylinder Head Bolts (Step 1) ................ 60 Nm (44 lb-ft)
Cylinder Head Bolts (Step 2) ................ 100 Nm (74 lb-ft)
Crankshaft Pulley Bolt ................ 300-350 Nm (221-258 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) ................ 100 Nm (74 lb-ft)
Flywheel Bolts ................ 110 Nm (81 lb-ft)
Rocker Arm Shaft Bracket Bolts ................ 25-30 Nm (18-22 lb-ft)
Rocker Arm Adjustment Locknut ................ 10 Nm (7 lb-ft)
Intake Manifold Bolts ................ 20-25 Nm (15-18 lb-ft)
Exhaust Manifold Nuts ................ 30-35 Nm (22-26 lb-ft)
Oil Pan Bolts ................ 10-12 Nm (7-9 lb-ft)
Injection Nozzle Holders ................ 50-60 Nm (37-44 lb-ft)
High-Pressure Fuel Line Nuts ................ 18-22 Nm (13-16 lb-ft)
Individual Injection Pump Retaining Screws ................ 25-30 Nm (18-22 lb-ft)
Valve Cover Bolts ................ 10-12 Nm (89-106 lb-in)
Oil Pan Bolts (M8 x 1.25) ................ 15-20 Nm (11-15 lb-ft)
Oil Filter (spin-on) ................ 20 Nm (15 lb-ft)
Turbocharger Mounting Nuts ................ 35-40 Nm (26-30 lb-ft)
Starter Motor Mounting Bolts ................ 35-40 Nm (26-30 lb-ft)
Alternator Mounting Bracket Bolts ................ 25-30 Nm (18-22 lb-ft)

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• Deutz Engines Specs
  
• Deutz BF4M1012 Specs
  
• Deutz BF4M1012EC Specs
  
• Deutz BF4M1012C Specs
  
• Deutz BF6M1012 Specs
  
• Deutz BF6M1012E Specs
  

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