Engineering:Mercedes-Benz OM601 engine
 | This article relies largely or entirely on a single source. (July 2025) |
| Mercedes-Benz OM601 engine | |
|---|---|
 OM601 engine | |
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 1983–2000 |
| Layout | |
| Configuration | Inline-4 |
| Displacement | 2.0 L (1,997 cc) 2.2 L (2,197 cc) 2.3 L (2,299 cc) |
| Cylinder bore | 87 mm (3.43 in) 89 mm (3.50 in) |
| Piston stroke | 84 mm (3.31 in) 92.4 mm (3.64 in) |
| Block material | Cast iron |
| Head material | Aluminum |
| Valvetrain | SOHC, 2 valves per cylinder |
| Compression ratio | 22.0:1 |
| Combustion | |
| Turbocharger | Yes (.97x only) |
| Fuel system | Indirect injection |
| Fuel type | Diesel |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 72–96 bhp (54–72 kW) |
| Torque output | 93–170 lb⋅ft (126–230 N⋅m) |
| Chronology | |
| Predecessor | Mercedes-Benz OM616 |
| Successor | Mercedes-Benz OM604 engine |
The Mercedes-Benz OM601 engine is an inline-four diesel engine that was manufactured by Mercedes-Benz from 1983 to 2000.[1]: 144 It is the successor to the OM616 engine and was succeeded by the OM604 engine in 1993.
Design
The OM601 is closely related in design to the 5 cylinder OM602 and the 6 cylinder OM603 engine families of the same era.[1]: 145
The OM601 uses an iron block with an aluminum head. The camshaft and fuel injection pump are driven by a duplex chain from the crankshaft; a separate single-row chain drives the oil pump from the crankshaft.
Fuel is delivered via indirect injection through the pre-chamber. The mechanical injection pump features a 5,150 RPM (± 50 RPM) mechanical governor, automatic altitude compensation, and load-sensing automatic idle speed control; the injection pump is lubricated by a connection to the engine oil circulation system.
The use of the block heater to aid in cold starting was recommended in climates where the temperature drops to below 10 °F (−12 °C) during the year.
Variants and Applications
Seven variants in three displacements were offered:
| Variant Code | Displacement | Application | Power | Torque | Notes |
|---|---|---|---|---|---|
| 601.911 | 2.0 L (1,997 cc)
122 in3 |
W201 190 D (European market) | 72 bhp (54 kW) at 4,200 RPM | 96 lb⋅ft (130 N⋅m) at 2,800 RPM | Naturally aspirated, European market consumer vehicle applications |
| 601.912 | W124 200 D (European market) | ||||
| 601.921 | 2.2 L (2,197 cc)
134 in3 |
W201 190 D (North American market) | Naturally aspirated, designed to meet North American emissions standards | ||
| 601.940 | 2.3 L (2,299 cc)
140 in3 |
T1 208 D, 308 D, and 408D | 78 bhp (58 kW) at 3,800 RPM | 152 lb⋅ft (206 N⋅m) at 2,000-2,800 RPM | Naturally aspirated, commercial vehicle applications |
| 601.942 | Vito 108 D | ||||
| 601.943 | Sprinter | ||||
| 601.970 | V 230 TD
Vito 110 D |
96 bhp (72 kW) at 3,800 RPM | 230 lb⋅ft (312 N⋅m) at 1,700-2,400 RPM | Turbocharged, commercial vehicle applications |
Gallery
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An OM601 engine with a removed oil-pan. Overview of the crankshaft and piston rods. -
A side-view of Mercedes-Benz OM601 engine diesel fuel injection pump. -
A close view of OM601's oil pump. On the left side the crankshaft belt drive washer is visible. -
Front-side view of a disassembled OM601 diesel engine. -
A Mercedes-Benz OM601 naturally aspirated diesel engine fitted in a W201 190D Mercedes-Benz passenger car.
References
- ↑ 1.0 1.1 Taylor, James (2015-05-31) (in en). Mercedes-Benz W124: The Complete Story. Crowood. ISBN 978-1-84797-954-4. https://books.google.com/books?id=nbbzCQAAQBAJ&dq=Mercedes-Benz+OM601+engine+-wikipedia&pg=PT144. Retrieved 2025-07-05.
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