Mercedes-Benz OM628 engine

Diesel engine
Reciprocating internal combustion engine
Mercedes-Benz OM628
Overview
ManufacturerMercedes-Benz
Production1999–2005
Layout
Configuration75° V8
Displacement4.0 L (3,996 cc)
Cylinder bore86 mm (3.39 in)
Piston stroke86 mm (3.39 in)
Cylinder block materialAluminium alloy
Cylinder head materialAluminium alloy
ValvetrainDOHC 4 valves x cyl.
Compression ratio18.5:1
Combustion
TurbochargerGarrett GT1749V
Fuel systemCommon rail
Fuel typeDiesel
Cooling systemWater cooled
Output
Power output184–191 kW (250–260 PS; 247–256 hp)
Torque output560 N⋅m (413 lb⋅ft)
Chronology
SuccessorMercedes-Benz OM629 engine

The Mercedes-Benz OM628 engine is a turbocharged V8 engine produced by Mercedes-Benz, from 1999 to 2005.

Design

The OM628 was created in response to competing V8 diesel engines produced by Audi and BMW.[1] It first appeared in the W220 S400 CDI and was subsequently the first V8 diesel engine in a Mercedes passenger vehicle. The OM628 engine features dual overhead camshafts, 4 valves per cylinder, exhaust gas recirculation, a Garrett GT1749V turbocharger, and Euro 4 emissions compliance.[2] The engine block and cylinder heads are made from an aluminium alloy, via the sand-casting process.

Models

Engine Power @ rpm Torque @ rpm Years
OM628

DE40 LA

184 kW (250 PS; 247 hp) 4,000 560 N⋅m (413 lb⋅ft) 1,700–2,600 1999–2005
191 kW (260 PS; 256 hp) 2003–2005

OM628 (184 kW version)

  • 1999–2003 W220 S400 CDI[3]
  • 2001–2005 W163 ML400 CDI[4]
  • 2001–2005 W463 G400 CDI[5]

OM628 (191 kW version)

  • 2003–2005 W211 E400 CDI[6]
  • 2003–2005 W220 S400 CDI[7]

References

  1. ^ "Audi A8 3.3 TDI, BMW 740d, Mercedes S 400 CDI: Audi A8 3.3 TDI, BMW 740d, Mercedes S 400 CDI". auto motor und sport (in German). Retrieved 2018-09-16.
  2. ^ "Mercedes-Benz OM628 and OM629 engines". australiancar.reviews. Retrieved 2018-09-16.
  3. ^ "2003 Mercedes Benz S-Class". Drive Arabia. Retrieved 2018-09-16.
  4. ^ Rebmann, Dieter (2005-06-01). "Mercedes-Benz M-Class (2005-) - motoring.com.au". motoring.com.au. Retrieved 2018-09-16.
  5. ^ "Mercedes-Benz G-Class 25th Anniversary - GermanCarFans.com". www.rubicon-trail.com. Retrieved 2018-09-16.
  6. ^ "Mercedes-Benz E 400 CDI: smooth diesel power from eight cylinders". www.new-cars.com. Retrieved 2018-09-16.
  7. ^ John, Honest (2005-10-28). "Buyers' guide: Mercedes-Benz S-class W220 (1999-2005)". ISSN 0307-1235. Retrieved 2018-09-16.