TheMercedes-Benz OM605is a 2.5 L (2,497 cc)inline-five cylinder(R5/I5)double overhead camshaft(DOHC)diesel enginewithindirect injectionmanufactured byMercedes-Benzbetween 1993 and 2001. It replaced thesingle overhead camshaft(SOHC)OM602engine.
| Mercedes-Benz OM605 | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | July 1993–2001 |
| Layout | |
| Configuration | Straight-5 |
| Displacement | 2.5 L (2,497 cc) |
| Cylinder bore | 87 mm (3.43 in) |
| Piston stroke | 84 mm (3.31 in) |
| Cylinder blockmaterial | Cast iron |
| Cylinder headmaterial | Aluminum |
| Valvetrain | DOHC/ 4 valves x cyl. |
| Valvetrain drive system | Chain |
| Compression ratio | 22.0:1 |
| RPM range | |
| Idle speed | 650-750 (.911) 580-680 (ERE) |
| Max. engine speed | 5200 RPM |
| Combustion | |
| Turbocharger | No (.91x) Yes, intercooled (.96x) |
| Fuelsystem | Boschin-lineindirect injectionM-type |
| Management | RSF Governed (.911) Bosch EDC (ERE) |
| Fuel type | Diesel |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 83–110 kW (113–150 PS; 111–148 hp) |
| Torque output | 170–280 N⋅m (125–207 lb⋅ft) |
| Emissions | |
| Emissions control systems | Catalytic converter Exhaust gas recirculation |
| Chronology | |
| Predecessor | Mercedes-Benz OM602 engine |
| Successor | Mercedes-Benz OM612 engine |
It uses aBoschelectronically controlled inline injection pump (ERE) except in the W124 where it uses a Bosch mechanically governed inline injection pump (Bosch M pump with RSF governor).
It is related to thestraight-42.0 and 2.2 litreOM604and thestraight-63.0 litreOM606engines.
Design
editAs per the OM602 the engine has a cast iron block and aluminum cylinder head, the block has 6 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 OM602 it has hydraulic bucket type lifters, thus requiring no periodical valve adjustment. A big difference when compared to its turbo predecessors is the intercooler
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
The main differences between the naturally aspirated and the turbocharged versions are the cylinder head, injection pump, valves, camshafts, rods, intake and exhaust manifolds and some minor differences like oil feed and return holes for the turbo and different crankcase ventilation system, valve cover and plastic engine cover
Specifications
edit| ID | DIN-rated max. motivepower atrpm |
max.torque at rpm |
aspiration | years | applications |
|---|---|---|---|---|---|
| OM 605.910 ERE | 83 kW (113 PS; 111 hp) @5000 rpm | 170 N⋅m (125 lb⋅ft) @2800 rpm | Natural | 1993–1995 | W202C 250 D |
| OM 605.911 | 83 kW (113 PS; 111 hp) @5000 rpm | 170 N⋅m (125 lb⋅ft) @2800 rpm | Natural | 1993–1996 | W124E 250 D |
| OM 605.912 ERE | 83 kW (113 PS; 111 hp) @5000 rpm | 170 N⋅m (125 lb⋅ft) @2800 rpm | Natural | 1996–1998 | W210E 250 D |
| OM 605.960 ERE | 110 kW (150 PS; 148 hp) @4400 rpm | 280 N⋅m (207 lb⋅ft) @1800 rpm | Turbocharger,intercooler | 1995–2001 | W202C 250Turbodiesel |
| OM 605.962 ERE | 110 kW (150 PS; 148 hp) @4400 rpm | 280 N⋅m (207 lb⋅ft) @1800 rpm | Turbocharger, intercooler | 1997–1998 | W210E 250Turbodiesel |
See also
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