Mercedes-Benz OM642

Mercedes-Benz OM642

Manufacturer	Daimler AG
Production	2005-
Displacement	2,987 cc (182.3 cu in)
Cylinder bore	83 mm (3.3 in)
Piston stroke	92 mm (3.6 in)
Cylinder block alloy	Aluminum
Cylinder head alloy	Aluminum
Valvetrain	DOHC 4/cylinder
Compression ratio	18:1
Turbocharger	variable nozzle
Fuel system	Common rail injection
Fuel type	Diesel
Power output	european models: 165 kW (224 PS; 221 hp). US vehicles: 157 kW (213 PS; 211 hp). Mercedes/Dodge Sprinter: 140 kW (190 PS; 190 hp).
Torque output	european models: 510 N·m (380 lb·ft). , US vehicles: 540 N·m (400 lb·ft). Mercedes/Dodge Sprinter: 440 N·m (320 lb·ft).
Dry weight	208 kg (460 lb)

The Mercedes-Benz OM642 engine is a 3.0-liter, 72° 24-valve, aluminum block diesel V6 engine manufactured by the Mercedes-Benz division of Daimler AG as a replacement for the Mercedes-Benz inline-5 and -6 engines.^[1]

The engine features common rail fuel injection and a variable nozzle turbocharger. The injection system operates at 1,600 bar (23,000 psi), while intake air is compressed at a ratio of 18:1.^[1] The engine features a counter-rotating balance shaft mounted between the cylinder banks to cancel the vibrations inherent to the 72 degree V6 design, and the crankpins are offset by 48 degrees to achieve even 120 degree firing intervals. In some heavy vehicle applications, Mercedes' BlueTec AdBlue urea injection is utilised for NOx reduction.^[2] In lighter vehicle applications, a NOx storage catalyst captures nitrous oxides, which are periodically purged (decomposed) by running the engine slightly rich. A particulate filter lowers soot, making this engine ULEV certified.^[2][3] Engine mass is 208 kg (460 lb). Power output is 165 kW (224 PS; 221 hp) and 510 N·m (380 lb·ft) of torque.^[1] For the 2012 model year, output on US mercedes diesel vehicles will be raised to 240 horsepower and 455 lb-ft of torque.

The engine is manufactured at the Daimler AG plant in Marienfelde, Berlin, Germany.^[4]

Oil specification MB 229.51 or MB 228.31 is recommended/^{[citation needed]}

Vehicles using this engine include:

• Dodge / Freightliner Trucks / Mercedes-Benz Sprinter (2006-present)
• Jeep Grand Cherokee WK (2005¹-2007²-2008)
• Mercedes-Benz C320 CDI (2007-present)
• Mercedes-Benz E320 CDI (2007-present)
• Mercedes-Benz S320 CDI (2005-present)
• Chrysler 300 (2006-present) (Europe and Australia only)
• Mercedes-Benz Vito Van 120 cdi and Vito 204 Sports (2006-present UK)

¹ EMEA ² North America

See also

• List of Mercedes-Benz engines

References

1. ^ ^{a b c} "05_kompact_en.doc". ourexcellentadventures.com. http://www.ourexcellentadventures.com/wp-content/documents/OM642.pdf. Retrieved 2009-02-13. 
2. ^ ^{a b} Consumer Reports: What is BlueTec?
3. ^ Motive Magazine ULEV certification, Diesel Car Bomb BlueTec
4. ^ "Mercedes-Benz C 320 CDI". auto-innovations.com. http://www.auto-innovations.com/site/document/mercedescdiv6en.html. Retrieved 2009-02-13.