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.
|Displacement, cc||1997 (OM 604 D 20)
2155 (OM 604 D 22)
|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)
|Recommended engine oil||5W-40|
|Engine oil capacity, liter||6.5|
|Euro standards||EURO 2/3|
|Fuel consumption, L/100 km (for Mercedes C220 D 1996)
|Engine lifespan, km||~450 000|
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.