Engine Mercedes OM612

The Mercedes Benz OM612 engine is a 5-cylinder diesel engine with 2 overhead camshafts that drive 20 valves through pushrods. Compared to its predecessor OM604, it has 30% more power, 50% more torque and 10% less fuel consumption. An oxidation catalyst is used to clean the outlet gases. As the efficiency of the new generation engines was increased, there was not enough heat to heat the passenger compartment at low temperatures.

Specifications

Displacement 2685 cc
Fuel system Common Rail
Power 156 – 170 hp
Torque output 330 – 400 Nm
Cylinder block cast iron R5
Cylinder head aluminum 20v
Cylinder bore 88 mm
Piston stroke 88.3 mm
Compression ratio 18:1
Hydraulic compensators yes
Timing drive chain
Turbocharging yes
Recommended engine oil 7.5 liters 5W-30
Fuel type diesel
Euro standards Euro 3/4
Engine lifespan 350 000 km

Frequent problems

  • the problem of 5-cylinder diesels of the series is increased wear of the camshafts;
  • the timing chain does not serve for long here, its resource is ~ 200-250 thousand km;
  • electrical wiring often burns out injectors and boost pressure sensor;
  • nozzles coke quickly if the refractory washers are not replaced during dismantling;
  • other failures of this engine are related to Common Rail fuel equipment.

Modification OM 612 DE 27 LA: 5-cylinder, 2685 cm3, bore and stroke 88 and 88.3 mm, respectively, generation CDI II generation.

Car model Power at (rpm) Torque output at (rpm)
Sprinter 216 CDI, 316 CDI,
416 CDI, 616 CDI (W 901-905)
115 kW (156 hp) at 3800 330 Nm at 1400-2400
G 270 CDI (W 463) 115 kW (156 hp) at 3800 400 Nm in 1800-2400
ML 270 CDI (W 163) 120 kW (163 hp) at 4200 370 Nm at 1600-2800 with MT
400 Nm at 1800-2600 with AT
C 270 CDI (W / S 203) 125 kW (170 hp) at 4200 370 Nm at 1600-2800 with MT
400 Nm at 1800-2600 with AT
400 Nm in 1800-2800
CLK 270 CDI (C 209) 125 kW (170 hp) at 4200 400 Nm at 1800-2800 with MT
400 Nm at 1800-2600 with AT
E 270 CDI (W / S / VF 210) 125 kW (170 hp) at 4200 370 Nm at 1600-2800 with MT
400 Nm at 1800-2800 with AT

Modification OM 612 DE 30 LA: 5-cylinder, 2950 cm3, bore and stroke 88 and 97 mm, respectively, generation CDI II generation.

Car model Power at (rpm) Torque at (rpm)
C 30 CDI AMG (W / S / CL 203) 170 kW (231 hp) @ 3800 540 Nm @ 2000

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