Engineering:Mercedes-Benz OM648 engine

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Mercedes-Benz OM648
Overview
ManufacturerMercedes-Benz
Production2002-2006
Layout
ConfigurationInline 6
Displacement3.2 L (3,222 cc)
Cylinder bore88 mm (3.46 in)
Piston stroke88.3 mm (3.48 in) [1]
Block materialCast iron
Head materialAluminum
ValvetrainDOHC 4 valves x cyl.
Combustion
TurbochargerSingle variable nozzle
Fuel systemcommon rail fuel injection
Fuel typeDiesel
Oil systemWet sump
Cooling systemWater cooled
Output
Power output204 PS (150 kW; 201 hp)
Specific power63.3 PS (46.6 kW; 62.4 hp) per litre
Torque output500 N⋅m (369 lb⋅ft)
Chronology
PredecessorOM613
SuccessorOM642

The Mercedes-Benz OM648 engine is a 3.2 Litre, straight-6 4 valves per cylinder, cast iron block diesel engine manufactured by the Mercedes-Benz division of Daimler AG as a replacement for the previous Mercedes-Benz inline-5 and -6 engines.

The engine features common rail fuel injection and a variable nozzle turbocharger. The injection system operates at 1,600 bar (23,000 psi).

Power output is 204 PS (150 kW; 201 hp) at 4200 rpm and 500 N⋅m (369 lb⋅ft) of torque from 1,800 to 2,600 rpm.

Mercedes claims this engine will propel the E320 CDI to 60 mph (97 km/h) in 6.6 seconds. All while managing 27 mpg‑US (8.7 L/100 km; 32 mpg‑imp)+ city and 37 mpg‑US (6.4 L/100 km; 44 mpg‑imp)+ Highway[citation needed]

Oil specification MB 229.31 or MB 228.31 is recommended and has a service interval of 13,000 miles (21,000 km) using the specified oil.[citation needed]

OM648 is the successor to the OM613.

Technical specifications

Displacement Bore x Stroke Power Torque Applications
3.2 L; 196.6 cu in (3,222 cc) 88 mm × 88.3 mm (3.46 in × 3.48 in) 204 PS (150 kW; 201 hp) at 4200 rpm 500 N⋅m (370 lb⋅ft) at 1800 rpm 2002-2006 (?) E320 CDI and 2002-2005 S320 CDI

References