The Mercedes-Benz OM601 engine is an inline-four diesel engine that was manufactured by Mercedes-Benz from 1983 to 2000. 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.
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 during the year.
Variants and Applications Seven variants in three displacements were offered: +Variant CodeDisplacementApplicationPowerTorqueNotes601.911122 in3W201 190 D (European market) at 4,200 RPM at 2,800 RPMNaturally aspirated, European market consumer vehicle applications601.912W124 200 D (European market)601.921134 in3W201 190 D (North American market)Naturally aspirated, designed to meet North American emissions standards601.940140 in3T1 208 D, 308 D, and 408D at 3,800 RPM at 2,000-2,800 RPMNaturally aspirated, commercial vehicle applications601.942Vito 108 D601.943Sprinter601.970V 230 TD Vito 110 D at 3,800 RPM at 1,700-2,400 RPMTurbocharged, commercial vehicle applications
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