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About The BMW M50 Engine
The straight six-cylinder petrol engines of the M50 family replaced the M20 engines in 1990. They were produced until 1995, when they were replaced by M52 engines .
The main difference between the M50 engine and its predecessor is the cylinder head, which has four valves per cylinder and two camshafts . In this regard, BMW engineers have achieved better filling and as a result – the best power characteristics of the motor in the upper speed range, sacrificing torque at low revs.
The timing belt drive M20 was replaced in the M50 with a chain engine, which increased the reliability of the engine. The cylinder block was made of cast iron. The center distance of the cylinders at the block M50 and M20 are the same.
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BMW produced the following modifications of M50 engines:
| Modification | Bore | Piston stroke | Engine capacity, | Power | Power, | Torque, | Maximum |
|---|---|---|---|---|---|---|---|
| engine | mm | mm | cm³. | compression | hp | Nm | rev / min |
| M50B20 | 80 | 66 | 1991 | 10.5: 1 | 150 at | 190 when | 6500 |
| 5400 rpm | 4300 rpm | ||||||
| M50B20TU | 80 | 66 | 1991 | 11:01 | 150 at | 190 when | 6500 |
| VANOS | 5300 rpm | 4200 rpm | |||||
| M50B25 | 84 | 75 | 2494 | 10:01 | 192 at | 245 at | 6500 |
| 5400 rpm | 4300 rpm | ||||||
| M50B25TU | 84 | 75 | 2494 | 10.5: 1 | 192 at | 245 at | 6500 |
| VANOS | 5400 rpm | 4200 rpm |
M20B25 – the predecessor of the M50
Since September 1992, MAN’s engines began installing the VANOS proprietary variable valve timing system. This system receives commands from the engine control unit (ECU). By means of a solenoid valve, the computer opens the oil channel through which the oil acts on the mechanism, which changes the position of the intake camshaft, under pressure. This allowed to increase torque at low revs, reduce fuel consumption and allowed to compensate for the reduced efficiency of the M50 engine (unlike the M20) in the lower engine speed range.
M50 engines have proven themselves as reliable and powerful engines. They were installed on the following models: 320 E36, 325iS E36, 325 E36 , 520 E34 , 525 E34.
Also modified M50 engines were installed on the BMW Alpina B3 E36, had a volume of 2979 cm ³ and power 250 liters.
On the basis of the M50 engine, BMW Motorsport GMBH has developed sports engine modifications for M-series cars. They were labeled S50B30 and S50B32.
The injection control system of the M50 engine does not yet have a CAN bus, which makes it possible to read and reset ECU errors on the K-Line.
Past M50 Engine Enquiries
Name | City | Year / Model | Engine-Size | Engine Code | Requirements |
|---|---|---|---|---|---|
LESLIE NATHANSON | ALL | 2014 | 3.0 D | 90540712 | Greetings, i am looking for a engine new or second hand or sub assembly. BMW X5 M50D ENGINE CODE: N157 D30C ENGINE MODEL: F15 TRIPLE 3x TURBO THANK YOU |
Kamal | Johannesburg | 3lt / V6/ S4 | CAK | looking for complete used or new engine, request feedback | |
ahmed | kzn | 1993 | m50b25 non vanos | m50b25 | looking for above engine |
Thulasizwe Mkhabela | Nelspruit | 1994 | Bmw 325 | I’m looking for an e36 engine 325i size m50b20 | |
Tshimangadzo | Polokwane | N/A | N/A | N/A | looking for a complete engine on a BMW X6 M50D, in the Polokwane area. |
Tshimangadzo Booi Nemadzhilili | POLOKWANE | 2013 | M50 D BMW X 6 | NONE | PLS HELP ME WITH 2013 X6 M50 D BMW ENGINE |
Leslie | Johannesburg | 2014 / M50 d | 3.0 | 90540712 | Hello - please assist in sourcing BMW M50d engine. Looking for good used or reconditioned one. Also please recommend who can repair/overhaul similar engine. I am based in Swaziland/Eswatini. Many Thanks |
Jacques Hanekom | cape town | 2007 | 3lt d4d | looking for engin | |
Suhla | Secunda | 1995 | 325i E36 | M50B25 | Hello, kindly give me a price on an engine BMW 325i E36 Non Vanos if possible please. Regards Suhla |
BEN DU PLESSIS | WELKOM | 2.8 crd VM50C ENG | VM50C | NEW OR RECON ENGINE BLOCK AND HEAD JEEP LBERTY 2.8 CRD VM50C ENGINE | |
Anele | Queenstown | 2013 | 1.2 | G4LACM957321 | I'm looking for Hyundai i20 engine 1.2 motion 2013 model. |
Shaun | Witbank | e36 | 328i | M50 | looking for an engine. |
محمد | Cairo | 1996 | 2800 | Very Important! (Found On Your License Disc) | How much |
Mohau | Warrenton, northern Cape | 2013/ clio 4 | 1.2 petrol | 84BA | looking for a secondhand engine. |
Daan | Jhb | 2009 | 2.8 | Vm50C05932 | Engine for jeep wrangler 2.8 crd 2009 model! |