Mercedes-Benz OM604 engine
The Mercedes-Benz OM604 is a 2.0 litres (1,997 cc) and 2.2 litres (2,155 cc) inline-four cylinder (R4/I4) double overhead camshaft (DOHC) diesel engine with indirect injection manufactured by Mercedes-Benz between 1993 and 1998.[1] It replaced the single overhead camshaft (SOHC) OM601 engine. Unlike other Mercedes Benz diesels at the time that used a Bosch inline injection pump the OM604 used the Lucas electronically controlled rotary distributor injection pump (EVE) which is less reliable. The seals of the Lucas injection pumps become brittle over time and leak, a seal kit is available
| Mercedes-Benz OM604 engine | |
|---|---|
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 1993–1998 |
| Layout | |
| Configuration | Naturally aspirated Straight-4 |
| Displacement | 2.0 L (1,997 cc) 2.2 L (2,155 cc) |
| Cylinder bore | 89 mm (3.50 in) 87 mm (3.43 in) |
| Piston stroke | 86.6 mm (3.41 in) 84 mm (3.31 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Aluminum |
| Valvetrain | DOHC / 4 valves x cyl. |
| Compression ratio | 22.0:1 |
| Combustion | |
| Fuel system | Indirect injection |
| Management | Lucas EPIC |
| Fuel type | Diesel |
| Oil system | Wet sump |
| Cooling system | Water cooled |
| Output | |
| Power output | 55–70 kW (75–95 PS; 74–94 hp) |
| Torque output | 135–150 N⋅m (100–111 lb⋅ft) |
| Chronology | |
| Predecessor | Mercedes-Benz OM601 engine |
| Successor | Mercedes-Benz OM611 engine |
It is related to the straight-5 2.5 litre OM605 and the straight-6 3.0 litre OM606 engines.
Design edit
As per the OM601 the engine has a cast iron block and aluminum cylinder head, the block has 5 main caps, they are held by two bolts per cap. The head is a DOHC design with 4 valves x cylinder and split intake ports. As per the OM601 it has hydraulic bucket type lifters, thus requiring no periodical valve adjustment
It has a double row timing chain that drives the injection pump and the camshafts, the sprocket is on the exhaust camshaft and both cams are connected by a gear drive, while the oil pump is driven by a separate single row chain
Specifications edit
| ID | Displacement | Bore x stroke | Max. power (DIN-rated) | Max. torque | Years | Applications |
|---|---|---|---|---|---|---|
| OM 604.910 EVE | 2.2 L (2,155 cc) | 89 mm × 86.6 mm (3.50 in × 3.41 in) | 70 kW (95 PS; 94 hp) @ 5000 rpm | 150 N⋅m (111 lb⋅ft) @ 3100 rpm | 1993–1998 | W202 C 220 D |
| OM 604.910 EVE | 55 kW (75 PS; 74 hp) @ 5000 rpm | 1996–1998 | W202 C 220 D taxis | |||
| OM 604.912 EVE | 70 kW (95 PS; 94 hp) @ 5000 rpm | 1995–1998 | W210 E 220 D | |||
| OM 604.912 EVE | 55 kW (75 PS; 74 hp) @ 5000 rpm | 1996–1998 | W210 E 220 D taxis | |||
| OM 604.915 EVE | 2.0 L (1,997 cc) | 87 mm × 84 mm (3.43 in × 3.31 in) | 65 kW (88 PS; 87 hp) @ 5000 rpm | 135 N⋅m (100 lb⋅ft) @ 2000 rpm | 1996–1998 | W202 C 200 D |
| OM 604.917 EVE | W210 E 200 D |
SsangYong D20DT engine / OM664.95x edit
The Korean company Ssangyong has developed D20DT (created under license from Mercedes) series diesel engines based on the OM604 engine. Compared to the original Mercedes diesel, the Korean uses the Common Rail fuel injection system, turbocharging (unlike N/A OM604) and has slightly increased the engine capacity to 1,998 cc, compared to 1,997 cc in the OM604. In the Mercedes range, the engine has an index of OM664.950 / 951[2][3][4] and was installed on the Actyon, Actyon Sports and Kyron models in the mid-2000s.
| ID | Displacement | Bore x stroke | Max. power (DIN-rated) | Max. torque | Years | Applications |
|---|---|---|---|---|---|---|
| D20DT / OM664.950 | 2.0 L (1,998 cc) | 86.2 mm × 85.6 mm (3.39 in × 3.37 in) | 104 kW (141 PS; 139 hp) @ 4000 rpm | 310 N⋅m (229 lb⋅ft) @ 2700 (2750) rpm | 2005–2012 | (DJ) SsangYong Kyron M200 XDI |
| D20DT / OM664.951 | (CJ) SsangYong Actyon A200 XDI / Actyon Sports A200S XDI |
See also edit
References edit
- ^ "Engine specifications for Mercedes OM604, characteristics, oil, performance". Retrieved 2022-12-07.
- ^ "Engine SsangYong Kyron SUV 2.0 200 Xdi 16V 4x2 (OM664.950) (2006) - Used Car, Motorcycle and Truck Parts | TotalParts". www.totalparts.eu. Retrieved 2022-01-17.
- ^ "USED ENGINE DIESEL D20DT SET ASSY 4WD EURO-4 SSANG YONG FOR KYRON / ACTYON 2006-11 MNR". SHOP KOREA MOTORS. Retrieved 2022-01-17.
- ^ "Engine SsangYong Actyon SUV 2.0 A200 Xdi 4WD 16V (OM664.951) (664951) (0) - Used Car, Motorcycle and Truck Parts | TotalParts". www.totalparts.nl. Retrieved 2022-01-17.