Mercedes-Benz OM636 engine

Mercedes-Benz OM636 engine
Mercedes-Benz OM636 engine
Overview
Manufacturer	Daimler-Benz AG
Production	1949–1990
Layout
Configuration	Inline 4
Displacement	1.7 L (1,697 cc); 1.8 L (1,767 cc)
Cylinder bore	73.5 mm (2.89 in); 75 mm (2.95 in)
Piston stroke	100 mm (3.94 in)
Block material	Cast iron
Head material	Cast iron
Valvetrain	OHV
Compression ratio	19.0:1
RPM range
Redline	3600
Combustion
Fuel system	Precombustion chamber injection
Fuel type	Diesel
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	28–32 kW (38–44 PS; 38–43 hp)
Torque output	96–101 N⋅m (71–74 lb⋅ft)
Chronology
Predecessor	Mercedes-Benz OM138 engine
Successor	Mercedes-Benz OM621 engine

The Mercedes-Benz OM636 is a diesel engine produced by Daimler-Benz. It was introduced in 1949. It is the successor of the OM 138. During its long production time, the OM636 was first used as a passenger car engine in the Mercedes-Benz W 136 starting in 1949. Later, it was sold as an industrial engine and had many applications in vehicles such as light trucks, boats, and combine harvesters. It was succeeded by the OM621. However, after the introduction of the OM621, the OM636 was kept in production until 1990.

The abbreviation OM means Oelmotor (oil engine), and stands for a Daimler-Benz engine that uses any kind of oil as fuel (diesel engine).

History

In 1949, the W136 was offered with the OM636 displacing 1,7 L producing 28 kW (38 hp). For a short period of time between January 1952 and August 1953, a facelifted version of the W136 (now having the chassis code W 191) was sold. Its OM636 was increased in power by 1kW. In 1953, the W 120 succeeded the W191, starting in 1954 it was offered with an upgraded version of the OM636 now displacing 1,8 L and making 32 kW (43 hp). After the introduction of the W 110 in 1961, the OM636 was no longer used as a passenger car engine by Daimler-Benz. The production in Germany was stopped in the early 1960s. In Spain, the production continued until 1990.

Technical description

The OM636 is a water-cooled inline-four-cylinder diesel engine with precombustion chamber injection, OHV valvetrain and wet sump lubrication. Both the cylinder head and the cylinder block are made of grey cast iron. Both the crankshaft, which is supported in three bearings, and the connection rods are forged. The pistons are made of a light metal alloy. In the cylinder head, the OM636 has two overhead valves per cylinder. The camshaft is driven by gears, it also drives the injection pump. The inlet and the precombustion chambers are on the left engine side, the outlet, camshaft and injection pump are placed on the right engine side.

Technical data

Application	Engine code	Bore × Stroke	Displacement	Compression ratio	Rated power	Torque
170 D (W 136)	OM636 I	2.89 in × 3.94 in (73.5 mm × 100 mm)	1,697 cc (1.7 L)	19.0:1	28 kW (38 hp) @ 3200 rpm	96 N⋅m (71 lb⋅ft) @ 2000 rpm
170 DS (W 191)	OM636 VI	2.95 in × 3.94 in (75 mm × 100 mm)	1,767 cc (1.8 L)		29 kW (39 hp) @ 3200 rpm	101 N⋅m (74 lb⋅ft) @ 2000 rpm
180 D (W 120)	OM636 VII	2.95 in × 3.94 in (75 mm × 100 mm)	1,767 cc (1.8 L)		32 kW (43 hp) @ 3500 rpm	98 N⋅m (72 lb⋅ft) @ 1500 rpm

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Bibliography

Der 1,8-l-Dieselmotor des Mercedes-Benz 170 Da in: Kraftfahrzeugtechnik 7/1952, p.211-213

External links

Mercedes-Benz Ponton Technical Data: Diesel Models

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