Engine Mercedes OM604

A series of Mercedes OM604 diesel engines for 2.0 and 2.2 liters was assembled from 1993 to 1999 and installed on two models of the concern: C-Class in the back of the W202 or E-Class in the back of the W210. For taxi services, a modification of the 2.2-liter diesel engine derated to 75 hp was offered.

The diesel R4-family includes: OM616, OM601, OM604, OM611, OM640, OM646, OM651, OM654, OM668.

Specifications

Production years 1993-1999
Displacement, cc 1997 (OM 604 D 20)
2155 (OM 604 D 22)
Fuel system prechamber
Power output, hp 88 (OM 604 D 20)
95 (OM 604 D 22)
Torque output, Nm 135 (OM 604 D 20)
150 (OM 604 D 22)
Cylinder block cast iron R4
Block head aluminum 16v
Cylinder bore, mm 87 (OM 604 D 20)
89 (OM 604 D 22)
Piston stroke, mm 84 (OM 604 D 20)
86.6 (OM 604 D 22)
Compression ratio 22.0
Features no
Hydraulic lifters yes
Timing drive chain
Phase regulator no
Turbocharging no
Recommended engine oil 5W-40
Engine oil capacity, liter 6.5
Fuel type diesel
Euro standards EURO 2/3
Fuel consumption, L/100 km (for Mercedes C220 D 1996)
— city
— highway
— combined
9.7
6.1
7.4
Engine lifespan, km ~450 000
Weight, kg 180

The engine was installed on:

  • Mercedes C-Class W202 in 1993 – 1999;
  • Mercedes E-Class W210 in 1995 – 1998.

Disadvantages of the OM604 engine

  • For iron, the motors are very reliable and have a resource of about 400 – 500 thousand km.
  • The main problem with this diesel engine is the capricious Lucas fuel pump.
  • Gaskets in high-pressure fuel pumps dry out over time, and not everyone will undertake its repair.
  • The timing chain can already stretch for 200 – 250 thousand kilometers, which is fatal for the cylinder head.
  • Also, the cylinder head is very afraid of overheating, sometimes it simply bursts.

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