Mercedes-Benz OM636 engine

Mercedes-Benz OM636 engine
Overview
Manufacturer	Daimler-Benz AG
Production	1948 (pre-series production) 1949–1990 (series production)
Layout
Configuration	Inline 4
Displacement	1,697 cc (103.6 cu in) 1,767 cc (107.8 cu in)
Cylinder bore	73.5 mm (2.89 in) 75 mm (2.95 in)
Piston stroke	100 mm (3.94 in)
Cylinder block material	Cast iron
Cylinder head material	Cast iron
Valvetrain	OHV
Compression ratio	19.0:1
RPM range
Max. engine speed	3600
Combustion
Operating principle	Diesel
Fuel system	Precombustion chamber injection
Fuel type	Gasoil
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	OM 138
Successor	OM 621

The Mercedes-Benz OM636 is a diesel engine that was produced by Daimler-Benz from 1948 until 1990. Being the successor to the OM138, the OM636 has been used both as a passenger car engine and as an industrial engine. It saw its first use in the Boehringer Unimog in 1948, prior to its official introduction in the 1949 Mercedes-Benz W136. Throughout the 1950s, the OM636 was widely used in the Mercedes-Benz W120. In 1958, it was succeeded by the OM621 passenger car engine. However, after the introduction of the OM621, the OM636 was kept in production for industrial vehicles such as small lorries, boats, and combine harvesters, until 1990.

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