BMW M51
Template:Infobox automobile engine
The BMW M51 is an inline-6 cylinder Diesel engine produced by the Upper Austrian BMW plant in Steyr from July 1991 through February 2000. Its predecessor is the BMW M21; the successor is the BMW M57.
Description
The M51 is a water-cooled and turbocharged inline six-cylinder diesel engine. It is an indirect injection design with fuel supplied by a Bosch VP37 mechanical injection pump.[1][2][3] The displacement is 2,497 cc (152.4 cu in) and the compression ratio is 22.0:1.
Some engine variants have an intercooler in addition to the turbocharger; vehicles so equipped can be identified by the designation tds.[2] The M51 has a cast iron block and aluminum head, one chain driven overhead camshaft,[4] and two valves per cylinder.[2][4] Compared to the M21 the M51 features tappets and hydraulic valve lash adjustment.[2] The fuel injection in the first engines and all E36 models is controlled by the Bosch DDE 2.1, which was replaced after the first technical revision by DDE 2.2,[4] resulting in greater torque at lower revs.[4] For lubrication SAE 5W-40 oil is used.[5]
| Version | Power | Torque | Years |
|---|---|---|---|
| M51D25 UL | Template:Cvt at 4800 rpm |
Script error: No such module "convert". at 1900 rpm |
1991–1997 |
| M51D25 OL | Template:Cvt at 4800 rpm |
Script error: No such module "convert". at 2200 rpm |
1991–1996 |
| Opel X25DTTemplate:Efn | Template:Cvt at 4800 rpm[6][7][8][9] |
Script error: No such module "convert". at 1400 rpm |
1994–2001 |
| M51D25TÜ UL | Template:Cvt at 4800 rpm[10][11] |
Script error: No such module "convert". at 1900 rpm |
1996–1998 |
| M51D25TÜ OL | Template:Cvt at 4800 rpm[4] |
Script error: No such module "convert". at 2200 rpm |
1996–1998 |
| M51D25TÜ OL | Template:Cvt at 4600 rpm[4] |
1998–2000 | |
| M51D25M1Template:Efn | Template:Cvt at 4400 rpm[12] |
Script error: No such module "convert". at 2300 rpm |
1995-2001 |
Applications:
- 1991 - 1996 BMW 325td (M51D25 UL)
- 1996 - 1998 BMW 325td (M51D25TÜ UL)
- 1993 - 1996 BMW 325tds (M51D25 OL)
- 1996 - 1998 BMW 325tds (M51D25TÜ OL)
- 1992 - 1996 BMW 525td (M51D25 UL)
- 1991 - 1996 BMW 525tds (M51D25 OL)
- 1996 - 2000 BMW 525tds (M51D25TÜ OL)
- 1996 - 2000 BMW 525td (M51D25TÜ UL)
- 1996 - 2000 BMW 725tds (M51D25TÜ OL)
- 1995 - 2001 Range Rover (P38A)
- 1995 - 2001 Opel Omega B
- 1992 UMM Alter II (single example; engine, gearbox, and electronics were fitted by BMW in Munich)
See also
References
- ↑ BMW E38 7 Series 725 tds Technical data
- ↑ a b c d Die BMW-Sportdiesel: Von 524td E28 über 530d E39 bis BMW M550d F10 (german)
- ↑ Script error: No such module "citation/CS1".
- ↑ a b c d e f Etzold: So wird's gemacht: pflegen – warten – reparieren. Band 102, BMW 5er E39 Script error: No such module "webarchive". Delius Klasing Verlag. Pages 12 and 13 (german)
- ↑ Übersicht der Motorölqualitäten. Page 7 (german)
- ↑ Script error: No such module "citation/CS1".
- ↑ Opel Omega B 2.5 TD 96 kW 130 PS - Motor: 25DT, X25DT, X25TD - Eco Optimierung / Leistungssteigerung Script error: No such module "webarchive". (german)
- ↑ Script error: No such module "citation/CS1".Script error: No such module "Unsubst".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Automobile Catalogue: 1997 Range Rover 2.5 DSE (model for Europe ) specifications & performance data review Script error: No such module "webarchive"..