Mercedes-Benz OM628 engine

Mercedes-Benz OM628
File:Mercedes OM628 engine.png
Overview
Manufacturer	Mercedes-Benz
Production	1999–2005
Layout
Configuration	75° V8
Displacement	4.0 L (3,996 cc)
Cylinder bore	86 mm (3.39 in)
Piston stroke	86 mm (3.39 in)
Cylinder block material	Aluminium alloy
Cylinder head material	Aluminium alloy
Valvetrain	DOHC 4 valves x cyl.
Compression ratio	18.5:1
Combustion
Turbocharger	Garrett GT1749V
Fuel system	Common rail
Fuel type	Diesel
Cooling system	Water cooled
Output
Power output	184–191 kW (250–260 PS; 247–256 hp)
Torque output	560 N⋅m (413 lb⋅ft)
Chronology
Successor	Mercedes-Benz OM629 engine

The Mercedes-Benz OM628 engine is a turbocharged diesel 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. 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. 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
• 2001–2005 W163 ML400 CDI
• 2001–2005 W463 G400 CDI

OM628 (191 kW version)

• 2003–2005 W211 E400 CDI
• 2003–2005 W220 S400 CDI