The BMW M50 engine is an inline six -cylinder gasoline engine of the car manufacturer BMW and was introduced in late 1989 as a successor to the M20 engine family and heritage of the M30 engine family. He came first in the " fives " ( Model E34 ) and then in the " Tripartite " ( model E36 ) are used. He became the world with a capacity of 2.0 or 2.5 liters ( with 150 or 192 hp) in the BMW E36 and BMW E34 used was in the U.S. but also with 3.0 and later 3.2 liters in the U.S. BMW E36 M3 built.
Building on the M50 motor sport S50 is designed with individual throttle injection, which was used in the BMW E36 M3 and Z3.
Constructive innovations compared with the M20 were the four-valve technology, the timing chain, and the lash adjusters that make regular valve adjustment unnecessary. Only the S50B30/EU and S50B32/EU do not have tappets without hydraulic valve clearance compensation, which must be adjusted regularly. The M50 was - apart from rare sports car engine M88 - the first six-cylinder four -valve engine, which was produced at BMW in large series. A striking weakness of the engine was the unsatisfactory torque at low speeds. In contrast, to remedy this situation and to reduce fuel consumption, the engine starting in September 1992 equipped with VANOS variable camshaft control and technically modified. The modified engines hot M50TÜ ( technically revised ).
The M50 engine was until 1995 the E36 and to 1997 in five - Touring E34 used. The further developed from it follow engine is the M52 and was from 1994 BMW E36 (three ), from 1995 BMWE39 ( five ) and from 1998 used in the E46.
The M50 is, apart from overheating due to a defective water pump or a defective thermostat ( which you can all prevent 100tkm by the preventive replacement of parts), a fairly reliable and durable motor. Mileages up to 500,000 km and more are possible with good care. His running noise is typical of straight-six, although not quite as melodious as the older M20 and M30 two-valve engines.