At one time, the M50 engine was a real BMW favorite. He came to replace the M20 motor in 1991. New engine It was developed in two variations - 2.0 and 2.5 liters. However, his "life" was short-lived in the market: the release of "fifty-one" was discontinued in 1996, when a new modification arose with the aluminum block - it was assigned the M52 index.

Device M50.

The M50 engine was installed on the E34 and E36 model. In 1992, the BMW concern engineers presented the M50 new gas distribution system called Vanos. The main "china" innovation became inlet camshaftwhich allowed to increase the engine thrust on low and medium speeds without loss in high.

The design is a standard 6-cylinder engine, which turned out to be a cast iron block with an aluminum head. However, compared with the predecessor M20, the BMW M50 was a rather impressive step forward: 24 valve system Timing distribution with two camshalters, driven by chain, and valve drive through hydrocompensators. The ignition system was also subject to change - it became entirely electronic, the rubber was removed behind unnecessaryness and added the ignition coil to each candle.

M50 became the most successful and reliable engines from BMW, so they received further life - on the basis of the M50, such modifications were collected as 3 liter M3Е36 with a capacity of 240 hp. and Alpina B3 with 250 hp The last option was intended for the American market. The weight of the engine was about 136 kg.

M50 modifications

disadvantages

Despite all the "luckyness" M50, it turned out to be not perfect, like all the "long" engines: with a strong overheating, the gas joint loses hermeticness, as a result of which cracks are formed on the GBC. Excessive oil consumption, which in normal operation is 1 l per 1000 km, is observed after 300-400 thousand km of mileage. The consequences are sad - exhaust valves burn, and in some cases, due to local overheating, cracks are formed between them.

Many spare parts manufacturers install plastic details In the water pump, which becomes the cause of the destruction of bearings and the impeller of the pump. Often with a low qualification of masters, the result of the repair is incorrectly established camshafts. The motors of the first anniversary of the release suffer from the failures of the ignition coils and cases of burnout by the power keys controlling the ignition. But the erosion of the liners is distributed less than that of 40 series engines. Many engines 50 series observed leaks of oils - under the pads of the pallet, valve and front caps, along the connection of the cylinder block with an oil filter and the ring of the probe.

Some M50 suffer from the disconnection of cylinders, which in turn ceases to supply fuel. To enable them, it is often required not only to eliminate the malfunction, but also to clean the memory. But at least these systems are not too much suffering from breakdowns associated with lambda probe - oxygen sensor.

Dignity

The M50 has a number of differences from the first generation motors, which, of course, has become a big step forward for BMW. It is this engine with its 4 valves to the cylinder founded the fashion on the "explosive" engines of German autohygigant, which reached the present day.

The M50 became the last unit in which the bunch of the "cast-iron block and an aluminum cylinder head", which was truly true and reliable design.

Also, the M50 set the popular standard "1 nm by 10 cm 3 cylinders", which was unattainable in the engines of the old series. The engine perfectly adapted to 95 gasoline, which, though, not to say about 2 liter versions - it lacks even such an octane number. But this problem is solved to some extent using detonation sensors. According to the results, despite the shortcomings inherent in him, the BMW M50 became the best in the history of the concern both technical and consumer data.

Engine operation BMW M50 (video)

M50 is a rather popular motor that company BMW Released from 1991 to 1996. In 1994, a modification appeared on the light, the peculiarity of which was the aluminum block. Such a variation was also known as the "Plate".

The fiftieth was installed on the E34 and E36 models. In 1992, he was staffed by changing the phases of gas distribution titled Vanos. It was established to increase the thrust of the engine on low and medium turnover, without affecting the high turns.

Specifications and description

The M Series 50 family has several varieties of power units. It includes M50B25 and M50B20, which are remembered by many motorists, as technically reliable engines. Nearest modern relative Is BMW M5 E60.

Motor M50 was released only in two versions - 2.0 liters and 2.5l.

Advantages. M50 engine laid the beginning of a new fashion for aggressive character engines BMWwhich is preserved to our time. Also, this model was established by the standard, which no one had broken, "1NM, 10 cm 3 of the volume of cylinders."

The BMW M50 engine has become the last in its lineup, in which a truly legendary bundle was used in the form of a cast-iron block and an aluminum cylinder head.

Disadvantages. Despite the fact that among motorists, the engine BMW M50 is considered one of the most reliable motors For all the production, with improper operation, such problems are inevitable:

1. Overheat power aggregate
2. Leakage antifreeze
3. Failure of ignition coils
4. Oil flowing
5. Turning off the fuel supply

Service m 50.

Modifications M50, M50B20 and M50B25 use an excellent reputation, but do not tolerate careless maintenance. The conditions for their maintenance are as follows:

1. Oil change - every 10-12 thousand km. Oil must use only the manufacturer recommended by the manufacturer.
2. The timing chain is its average average of 250-300 thousand km, after which it stretches and needs to be replaced.
3. Nozzles and candles - every 50-80 thousand km.
4. Repair of the Vanos system - is made after 200-300 thousand km.

Engine repair M50.

Most common mechanisms are facing the cooling system pump, the radiator fan drive and failure oil filter.

Replacing the fan and viscous

The Viscounts need to be replaced by the fan hub searched, as well as with an increased axial or diametrical gap or with an increased oil consumption.

Removal process:

1. Removing the fan casing by removing the pins of spacer clamps in the top of the casing
2. Revealing fan mounting nut to the Water pump hub
3. Direct fan removal
4. The removal of the viscous fee is made with a crowd of four fastening bolts

Installation process:

1. Installation of the Viscounts and tightening the mounting bolts of 9 nm.
2. Installing the fan on the hub of the pump and tightening the nut with a torque of 25 nm
3. Installing the fan housing, while both lower protrusions must enter the radiator grooves
4. Installation of spacer clamps and their fixation by pins

Removing and installing water pump

Many owners of power units BMW M50 complain about a frequent output of the water pump. But, as practice shows, it is enough to simply change the product yourself. Consider the process of replacing the pump.

Removal process:

1. Disconnecting the wire of the battery mass
2. Dummy coolant
3. Removing fan
4. Weakening of pulley fastening bolts
5. Removing a wedge belt
6. Lapel of four pulley fastening bolts and removing the latter from the pump
7. Disconnecting water pump hoses
8. Lapel of Fastening Bolts and Pump Removing

Installation process:

1. Cleaning the installation surface
2. Installation of the sealing ring
3. Installing pumps and uniform tightening of fastening bolts
4. Attaching hoses to the water pump and consolidate by their clamps
5. Installing drive pulley
6. Installation and tension of a wedge belt
7. Installation fan
8. Filling the cooling system

Flushing cooling system

A frequent heating of the motor can mean that the cooling system has been clogged. Therefore, the motorist often needs to be cleaned by this node. This can be done with the help of auto chemicals or domestic tools, such as citric acid.

1. Removing the bumper, opening the lid on the tank and the radiator cork out
2. Closing the lid on the tank, compressor purge into the hole under the screw to remove air
3. Revealing the plug tube of the coolant from the block, draining the coolant
4. Filling the system with water, adding to it 7 minutes of washing Hi-Gear
5. Engine launch and waiting seven minutes
6. Engine cooling and liquid drain
7. Closing of all traffic jams, pouring 5-6l water
8. Opening a single tube and water turn compressor
9. Repetition of P.8 until it starts to go out
10. Filling the system of distilled water, starting the engine and warming it to operating temperature. Engine cooling and water drain
11. Slow filling system with new antifreeze and pumping increased turns
12. Hounding a new tank cover, warming up to operating temperature

Replacing butter and oil filter engine BMW M50

Change motor oil On the M50 motor, you can and with your own hands. Consider how to perform this operation without contacting the car service and save the means:

1. Revealing caps
2. Removing the valve cover
3. Removing the old strip

Output

You can change the engine oil on the M50 motor and your own hands.

Consider how to perform this operation without contacting the car service and save the means:

1. Heating Oil, Output Outflowing
2. Revealing the drain bolt, plums of oil
3. Outlet of the oil filter
4. Replacing the filter element and sealing gum
5. Pulling the oil through a special neck, parallel checking its level

Replacing valve lid gasket

One of the problems of the engines of the 50th family, and more precisely, the engine M50B20, is a valve cover laying break. You can change this item with your own hands. Consider a sequence of actions:

1. Removing both plastic protective housings
2. Disconnecting the pipe of the crankcase ventilation system from the valve cover
3. Disconnecting coil wires and removing ignition coils
4. Revealing caps
5. Removing the valve cover
6. Removing the old strip
7. Cleaning the surface of the cover from sealant
8. Promotation of a new sealant gasket and the assembly of everything in the reverse order

Output

The M50 family was replaced by the M20 in the distant 1990, and had a little differences, but they, in turn, allowed to significantly increase the power characteristics and reliability. The BMW M50B20 and M50B25 motor change, an improved and upgraded BMW M5 E60 came across.

Engine BMW. M50B20 / M50B20TU.

Engine characteristics M50B20.

Reliability, problems and repair of the engine BMW M50B20

The smallest row six bMW series M50 (the family also entered M50B24,) published in 1990, as a replacement outdated. The main innovation here is the use of a new GBC with 4 valves per cylinder and two camshafts, as well as with hydrocompensators. Are used distributional shafts with phase 240/228, lift 9.7 / 8.8. The diameter of intake valves is 30 mm, graduation 27 mm. On M50 is applied intake manifold From plastic, more advanced confosition.
Control system BOSCH MOTRONIC 3.1 / Siemens MS40.0.
Among other things, in the M50B20 belt drive, the timing gave way to a more reliable chain, which is more than 250 thousand km, instead of a traver, individual ignition coils are used, electronic system Ignition, new pistons, light rods 135 mm, compression height of piston 42.8 mm. Injectors M50 - 154 CC.

In 1992, the M50 engines were equipped with a phase inspector on the intake shaft (Vanos) and the name of new motors was changed to the M50B20TU. In these motors, new connectors were used, a long 145 mm long, and the compression piston height is now 31.64 mm.
Siemens MS 40.1 engine control system
These motors were used on cars BMW with index 20i.
In 1994, a new more advanced, with the same working volume, came to replace the low-consuming M50.

BMW M50B20 engine modifications

1. M50B20 (1990 - 1992 G.V.) - Basic variation of the engine. Compressive degree of 10.5, power 150 hp at 6000 rpm, torque 190 nm at 4700 rpm.
2. M50B20TU (1992 - 1996 G.V.) - Added Vanos System (phase inspection), replaced by SPGs, distribution shafts with phase 228/228, lifting 9/9 mm, compression ratio 11, power 150 hp At 5900 rpm, torque 190 nm at 4200 rpm.

Problems and disadvantages of BMW M50B20 engines

In the fault area, the M50B20 engine is similar to the eldest 2.5-liter brother M50B25, you can find out more details about problems.

BMW M50B20 Engine Tuning

M50B20 Stroker

It is no secret that the 2-liter engine does not strive with power and many M50B20 owners are not against increased power, not much in charge of losing reliability. The simplest way will buy an engine for SWAP. If we consider the options for modifying the native engine, then the easiest option to raise the return, it is to increase the working volume to 2.6 liters., With standard BMW details.
For this step, we will need to buy crankshaft and air flow sensor from, connecting rods stock, we buy pistons from M50TUB20. Nozzle, throttle, fuel pressure regulator and configured ECU is taken from M50B25. After the transformation data, we obtain the compression ratio of ~ 12 and the power of about 200 hp, there is 98 gasoline and we go without problems, or we put a thick gasket GBC. And Ipear 95, as an option you can remove from the bottom of the piston of 0.3 mm and do the standard gasket.
If the motor with Vanos, then put the crankshaft and connecting rods from M52B28, nozzles from M50B25.
To ours new Motor M50B26 revealed to full, you need to buy an intake manifold and throttle from the M50B25, making a porting of the head, combine channels and install an exhaust equationery collector with a full exhaust from M50B25 or sports. These modifications will allow the engine to breathe freely and maximum power will increase significantly. Dynamic characteristics The car with the engine M50B26 and the allied tuning, will be significantly higher than the usual M50B25.
The next step can be the M50B20 STROKER 3.0. To obtain 3 liters of work volume, we need to crush the cylinders to 84 mm and buy pistons with rings, rods with liners and crankshafts from. The cylinder block is becoming 1 mm. To this document the head of the cylinder block, the indigenous liners from M50B25, the timing chain with tensioner and the sedative, as well as all gaskets and nozzles 250 CC. After assembling all this on the basis of the M50B20 block, we will get a full M50B30 Stroker.
To obtain maximum power without a turbine on the M50B30 Stroker, you need to throw the stock camshafts and buy Schrick 264/256 (or other similar), 6 throttle inlet, nozzles and MAP sensor from S50B32, exhaust from. After the setting, we get about 250-270 hp, and sometimes more.

M50B20 Turbo

The most simple version of the turbist M50 is to buy a turbo whale based on the Garrett GT30 with a turbo collex, Westgate, Bloomoff, Map sensor, broadband lambda probe, a boost controller, full intake, intercooler, 440 CC nozzles and full release. So that it all went to customize the brain, we get about 300 hp at the exit. on the drain piston.
For greater power, it is necessary to replace the turbine on the Garrett GT35, nozzles for 500 ss, the stock pistons change to CP Pistons with a compression ratio of 8.5, Eagle connectors, bolts APR, a metal gasket of the cylinder block head, customizable and get the power 400 ++ hp.

BMW Concern (Bayerische Motoren Werke) is one of the world's largest manufacturers of cars and motorcycles. However, the release of engines internal combustion It occupies in the structure of its production far from last place. It is sufficient to note that the line of power units produced by the concern includes both gasoline and diesel:

• BMW row engines (model range M)

In the market of automotive power units, the most famous in line six cylinder engines BMW concern. Various modifications of motors model Row M were installed on cars BMW 3 and 5 episodes in different years:

m10 (1962-1988), M20 (1977-1987), M40 (1988-1994), M50 (1990-1995), M52 (1994-2001), M54 (2001-2006).

In 2005, a new generation came to replace the models bMW motors - Series N. The first representative was the N52 engine.

• M50 series engines

In the time of the USSR, the purchase of a BMW car was sunny dream every car enthusiast. However, in the time of "restructuring", many have managed their dream to implement? And on domestic roads in a fairly large number, these, previously inaccessible, models appeared.

It was at this time that BMW's concern massively released and installed on his cars engines of the M model range, specifications which many times exceeded the parameters of domestic automotive engines.

Specifications

Engine M50B25:

The engine was installed on the BMW concern production cars: 3 series - BMW 320 E36, 325i E36; 5 series - BMW 520 E34, 525i E34.

Description

The beginning of the model series M was laid 4-cylinder engines of the M10 series with a volume of 1.5 ... 2.0 liters. The high technical characteristics of various modifications of these motors were largely determined by the use:

• two carburetors;
• fuel injection;
• turbochargedwood.

Constructive features of M10 series motors:

• The diameter of the cylinder exceeds the magnitude of the piston stroke.
• Number of indigenous bearings - 5.
• Inlet and exhaust collectors are located on opposite sides of the power unit.
• The cylinder block housing is made of cast iron, and its head is made of aluminum.

Note: All models of the model range M use a combination of "cast-iron cylinder block + aluminum head". Only on the N52 series engines this pair began to make from a magnesium aluminum alloy.

At the end of 1988, a new series of 4-cylinder engines was developed on the basis of the M10 engine, which received the M40 index. Structurally, it was distinguished by the presence:

• valve hydraulic components;
• belt Drive Gas Distribution Mechanism (timing) SOHC.

Engines BMW Series M40 possessed:

1. higher power;
2. increased torque in the field of low and medium frequencies of rotation crankshaft;
3. smaller mass;
4. reduced overall dimensions.

However, the capacity of 4-cylinder engines for heavy bMW cars Catastrophically lacked. Therefore, the management of the company in the mid-60s decided to develop a model range of power units with 6 cylinders and seven crankshaft supports.

The beginning of him laid a family of row M30 engines with cylinder volume from 2.5 to 3.5 liters. Despite high technical specifications These engines had a number of disadvantages, among which were the main weight, significant dimensions and high cost.

In 1977, starting to develop more modern, distinguished high efficiency and low cost cars, concern engineers created a number of new modifications of 6-cylinder engines on the basis of M30.

The first of them became a series of M20 motors with 2 valves per cylinder and belt drive SOHC timetable. The motors of the M50 series came to replace the power units of this series, each of which is a row 6-cylinder gasoline engine having, in contrast to its predecessor, 4 valves per cylinder and two distributive shaft (DOHC system) with valve hydraulic components.

In addition, in the M50 GDM engines, the chain is operated, which is at least 250 thousand km of mileage. The presence of valve hydraulic components that exclude the need to adjust the latter, and the "unhappy" timing chain of the GDM significantly simplified maintenance These power units.

In addition, in 1992, the engines of this family got new system Vanos timing phases (Technical Update) developed by BMW concern.

The system allowed:

1. Increase torque on low revolutions crankshaft.
2. Reduce fuel consumption.

Installing the Vanos system required replacement:

• parts of a connecting rod-piston group;
• distribution shafts;
• electronic control unit (ECU).

Further vanos. has undergone a number of changes. So on the engine N52, a more advanced system of changing the phases of gas distribution on two Double Vanos shafts was installed.

Maintenance

The regular maintenance of M50 series motors is reduced to a timely replacement of engine oil.

The regulatory documents of the concern are recommended to change the oil every 15,000 km of run, however, given the state of our roads and the quality of fuel, the specialists of domestic STRs are advised to conduct this procedure after 7,000 km. At the same time, it is necessary to monitor that the fuel filling oil has a BMW LL-98 or LL-01 tolerance.

Fault

M50B25 engines are considered among the most reliable BMW concern motors. However, they, especially after the magnitude of the run exceeds 200 thousand km, is peculiar to a number of frequent faults.

Tuning

Unlike the engines of the N52 series, which are practically not amenable to tuning, the models of the model range can be refined independently. For example, there are several options for tuning, with which you can increase engine power M50B25:

1. The easiest way is to install the long-spent crankshaft (row), which was installed in the M54B30 engine. At the same time, it is necessary to acquire and set a number of parts of this power unit: a connecting rod-piston group; nozzles; Indigenous liners. By setting up the computer appropriately, you can get the power of about 230 liters. from.
2. Maximum power without the use of the turbine can be obtained if you install: Schrick 284/284 camshafts; nozzles from the sports engine S50; sixded inlet; equational exhaust manifold; River exhaust system etc. Proper setting The computer will allow the power of the motor to 280 liters. from.
3. If you set the goal to increase the power of the motor up to 500 liters. p., then this can be done by installing it: Turbocitis with Garret GT 35; row-piston group for compression ratio 8.5; Nozzle 550 ss.

The predecessor of which was the sensational E28. Even today, it is really worthy of attention a car that is very popular. It is safe to say that this is a kind of masterpiece. Let's look at the technical characteristics of this model, we find strengths and weaknesses.

Salon and equipment

Today, not every car is so comfortable as E34. The fact is that the central console here is made in such a way that the driver can not only quickly, but also comfortably access all the necessary management bodies. As for the sensors, they are mounted in a "torpedo" very successful. During the movement, they are excellent. In the dark, no need to look after, as the backlight of the devices at the level. To eliminate freezing and fogging windows, air ducts are provided that there is not only on the front panel, but also the doors that in the complex gives good result. Already by the 90s, the transport was equipped with air conditioning and a safety cushion for the driver. In addition, it was possible to order a complete set with a cassette radio, the disks at that time were not yet. In the maximum configuration, a hatch was installed on an electric drive and a leather interior.

Installed engines on E34

While the car was not removed from production, 13 engines were proposed, 11 of which are gasoline. As for power, the scatter is large enough. Minimum - 115 horses for a gasoline engine and as much for diesel. It was also possible to purchase a car with a 340-strong engine, but it was an exclusive. At the very beginning it was planned to install a series of M20 and M30 of 2.0 / 2.5 and 3.0 / 3.5 liters. All these motors can be considered relatives, they have a belt drive, as well as two valves for each cylinder. The absence of hydrocompensators led to the fact that heat gaps were periodically required, but it was not a problem, since it was necessary to perform this kind of setting every 35,000-40,000 kilometers. Even less often it was necessary to perform a belt replacement, every 50,000-60,000 kilometers. It is difficult to say which M20 and M30 there were serious disadvantages, as the assembly was really high quality.

Engines BMW E34: M50 and M60

Already by 1990, in Munich decided to establish modified motors. Almost all the parameters, they won their predecessors. One of the weighty advantages was the presence of a Vanos gas distribution system. M50 had a working volume of 2.0 and 2.5 liters with a capacity of 150 and 192 horsepower respectively. The main task of the designers was an increase in power, torque and improvement of efficiency. To achieve all this, installed 4 valves for each cylinder, various modifications accelerated their filling. The resource of motors was also at the level. Under all operating requirements, the engine could pass about 600,000 kilometers. The main drawback is a high sensitivity to overheating, which is why the owners had to constantly monitor the state of the pump, thermostat and nozzles. It is recommended not to expect a complete failure of a certain Spare Parts of the BMW E34, but to replace it before the emergency state occurs.

Modifications of car

In 1991 was released all-wheel drive model. New modification "Five" produced with one gasoline engine 2.5 liter volume. Torque priority was given to rear wheelsSince there accounted for about 64%, the remaining 36% on the front. Almost all cars had a mechanical five-speed gearbox, which was less common automatic box on 5 steps. As for the service life, such as silent blocks, they are recommended to change every 55-60 thousand kilometers. Change every 40 thousand kilometers. It is impossible not to say about the steering hydraulicel, which immediately fell in love with drivers. Depending on speed vehicle The steering wheel could become harder or easier. This, of course, did not solve problems with a worm pair, which quickly failed, nevertheless, a sense of security and comfort appeared on the road. In principle, even in 2014 it is safe to say that the E34 is a complex in the car, but the level of reliability is at height. If you go on time, change consumables and care for the vehicle, then there will be no problems with it.

Specifications with manual gearbox

The vehicle is equipped with a 2.5-liter engine, which issues 192 horsepower. About 8.5 s machine can accelerate to 100 kilometers, and maximum speed It is 230 km / h. As for the fuel consumption, the car came out not so voracious, if you look at its power. On average, it is 9 liters per 100 km. The trunk is also quite spacious, its volume is 460 liters. You need to say what to please and fuel tankIn which you can fill 80 liters of fuel. Clearance is 120 millimeters. Today is popular and which includes the installation of a sports crankshaft and another. All this allows you to get speed \u200b\u200bcarBut at the same time very economical. As for the cost, it depends on the body's condition, as well as under the hood. Most often options from 4 to 9 thousand dollars.

Conclusion

So we made a brief overview of E34. If you are standing before choosing, do not rush to make a decision. Do not pay attention to the engine size, better look at how the interior is preserved and in what state the vehicle assemblies and aggregates. To begin with, evaluate appearance BMW E34. In this case, it is advisable not to believe, but browse yourself, preferably with a specialist. So you can get an objective assessment, ride and make conclusions for yourself. Here, in principle, all that can be said about the legendary E34. Expensive repair with more than paying for durability and reliability of the vehicle, so you can not worry. It is necessary to pour only high-quality oil and gasoline, as any engine, be it m2 or M5, requires a careful relationship and good care.