Mercedes-Benz OM636 engine

Mercedes-Benz OM636 engine
Overview
Manufacturer	Daimler-Benz AG
Production	1949–1990
Layout
Configuration	I4
Displacement	1697–1767 cc
Cylinder bore	73,5 mm
Piston stroke	100 mm
Cylinder block alloy	Cast iron
Cylinder head alloy	Cast iron
Valvetrain	OHV
Compression ratio	19 : 1
Combustion
Fuel system	Precombustion chamber injection
Fuel type	Diesel fuel
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	28–32 kilowatts (38–43 hp)
Torque output	96–101 N·m
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 W 136 was offered with the OM636 displacing 1,7 l producing 28 kW. For a short period of time between January 1952 and August 1953, a facelifted version of the W 136 (now having the chassis code W 191) was sold. It′s OM636 was increased in power by 1 kW. In 1953, the W 120 succeeded the W 191, starting in 1954 it was offered with an upgraded version of the OM636 now displacing 1,8 l and making 32 kW. 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

See also

• List of Mercedes-Benz engines

Bibliography

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

External links

Wikimedia Commons has media related to Mercedes-Benz OM636.