Mercedes-Benz OM605 engine
The Mercedes-Benz OM605 is a 2.5 L (2,497 cc) inline-five cylinder (R5/I5) double overhead camshaft (DOHC) diesel engine with indirect injection manufactured by Mercedes-Benz between 1993 and 2001. It replaced the single overhead camshaft (SOHC) OM602 engine.
| Mercedes-Benz OM605 engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 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 block material | Cast iron |
| Cylinder head material | Aluminum |
| Valvetrain | DOHC / 4 valves x cyl. |
| Compression ratio | 22.0:1 |
| Combustion | |
| Turbocharger | No (.91x), Yes, intercooled (.96x) |
| Fuel system | Indirect injection |
| Management | Bosch |
| 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) |
| Chronology | |
| Predecessor | Mercedes-Benz OM602 engine |
| Successor | Mercedes-Benz OM612 engine |
It uses a Bosch electronically 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 the straight-4 2.0 and 2.2 litre OM604 and the straight-6 3.0 litre OM606 engines.
Design
As 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
| ID | DIN-rated max. motive power at rpm | 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 | W202 C 250 D |
| OM 605.911 | 83 kW (113 PS; 111 hp) @5000 rpm | 170 N⋅m (125 lb⋅ft) @2800 rpm | Natural | 1993–1996 | W124 E 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 | W210 E 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 | W202 C 250 Turbodiesel |
| OM 605.962 ERE | 110 kW (150 PS; 148 hp) @4400 rpm | 280 N⋅m (207 lb⋅ft) @1800 rpm | Turbocharger, intercooler | 1997–1998 | W210 E 250 Turbodiesel |
See also
