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Mercedes-Benz OM601 engine
OM601 engine with head removed.
Overview
Manufacturer	Mercedes-Benz
Production	1983–2001
Layout
Configuration	Inline 4
Displacement	2.0 L (1,997 cc) 2.2 L (2,197 cc) 2.3 L (2,299 cc)
Cylinder block material	Cast iron
Cylinder head material	Aluminum
Valvetrain	OHC / 2 valves x cyl.
Combustion
Fuel system	Indirect injection
Fuel type	Diesel
Output
Power output	72–96 bhp (54–72 kW)
Torque output	96 lb⋅ft (130 N⋅m)
Chronology
Predecessor	Mercedes-Benz OM616
Successor	Mercedes-Benz OM604 engine

The Mercedes-Benz OM601 engine is a 4 cylinder diesel automobile engine that was manufactured by Mercedes-Benz.

Three variants of the engine were built, a 2.0 L; 120.6 in (1,977 cc) model, a 2.2 L; 134.1 in (2,197 cc) version built for the US market and a 2.3 L; 140.3 in (2,299 cc) for commercial vehicles. The first two were rated by the manufacturer for 72 bhp (54 kW) at 4200 RPM and 96 lb⋅ft (130 N⋅m) of torque at 2800 RPM; the increase in displacement reduced emissions in order to meet US automobile emissions requirements. The commercial vehicle version had 78 bhp (58 kW) in standard variants, the turbocharged version (OM601.970) in the V230 TD and Vito 110D had 96 bhp (72 kW).

The OM601 was built with an aluminum head on an iron block.

The camshafts 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 supply is indirect injection via a prechamber arrangement. The OM-601's injection pump is a mechanical fuel injection unit with a 5,150 RPM (+ or - 50 RPM) mechanical governor, automatic altitude compensation, and a 'load sensing' automatic idle speed control. The pump is lubricated by a connection to the engine oil circulation.

Use of the block heater was recommended in climates where it drops below 10 °F (−12 °C) for long periods.

The engine was used in the 208D 308D and 408D Mercedes-Benz T1 and later the Phase 1 308D Mercedes-Benz Sprinter

Images

• 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.

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