The Mercedes-Benz OM636 is a

diesel engine The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...

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 The Mercedes-Benz W120 and Mercedes-Benz W121 are technically similar inline-four cylinder sedans of slightly different engine displacements made as two model series by Mercedes-Benz, the 180 and 190: * the W120 was introduced as the 180 in 1953, ...

. 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).

History

Daimler-Benz began developing the OM636 during World War II, and had completed the developing process by 1948. According to Carl-Heinz-Vogler, a former Daimler-Benz engineer, the OM636 was ready for series production in 1948. The pre-series production units made that year were used in the 1948 Boehringer Unimog. In 1949, the W136 was offered with the OM636, displacing 1.7 litres and producing . For a short period of time between January 1952 and August 1953, a facelifted version of the W136 (now having the chassis code W191) was sold. Its OM 636 was increased in power by 2 PS. In 1953, the W120 succeeded the W191, starting in 1954 it was offered with an upgraded version of the OM636, now displacing 1.8 litres and again making . After the introduction of the W110 in 1961, the OM636 was no longer used as a passenger car engine by Daimler-Benz. Production in Germany was stopped in the early 1960s, while continuing until 1990 in Spain. In 1969, the spanish automotive manufacturer

SEAT A seat is a place to sit. The term may encompass additional features, such as back, armrest, head restraint but may also refer to concentrations of power in a wider sense (i.e " seat (legal entity)"). See disambiguation. Types of seat The ...

presented the SEAT 1800 D, a version of the SEAT 1500 equipped with Mercedes-Benz OM636 diesel engine.https://en.escuderia.com/seat-1800-d-diesel-motor-mercedes/

Technical description

The OM636 is a water-cooled inline-four-cylinder diesel engine with precombustion chamber injection, eight valves, OHV valvetrain and wet sump lubrication. It has a cross-flow cylinder head made of grey cast iron. The cylinder block material is also 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. The camshaft is driven by gears, it also drives the inline injection pump. The camshaft and injection pump are placed on the engine's exhaust side.

Technical data

References

Bibliography

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

External links