Since it's introduction for the 2001 model year the GM Duramax 6.6L diesel V-8 has been one of the most highly regarded truck diesels on the market. The engines were jointly developed with Isuzu Motors and built in a joint-venture plant in Dayton, Ohio. The DMAX plant has just produced the one millionth Duramax V-8. The 6.6L is four valve per cylinder V-8 with common rail injection and the 2007 version also has a particulate filter so that it can meet new emission standards. The engine is used in the heavy duty versions of the Siverado/Sierra pick up trucks, the Express/Savanna vans and also the larger medium duty Chevy Kodiak/GMC Topkick trucks.

[Source: General Motors]
DAYTON, Ohio – General Motors Corp. (GM) announced today the production of its one-millionth Duramax V-8 turbo-diesel engine at the DMAX plant in Moraine.

DMAX Ltd., a joint venture between GM and Isuzu Motors Limited, was established as a diesel engine company in 1998. GM first introduced the Duramax diesel in the U.S. in the 2001 model year and since then, customer enthusiasm for this heavy duty diesel has been outstanding. In fact, GM's heavy duty diesel pickup market share has jumped nearly tenfold in the six years that Duramax engines have been offered.

"Our Duramax diesel is one of the best in the industry," said John Buttermore, vice president, GM Powertrain Global Manufacturing. "It's the strongest and quietest diesel on the market, and we continue to sell every single Duramax we can build."

"This is a significant achievement," said Maho Mitsuya, Chief Executive Officer of DMAX, Ltd. "It highlights the productivity of our employees and the joint partnership between Isuzu, GM, and the IUE-CWA. It also demonstrates our commitment to building quality in every engine - whether it's our first or our one-millionth."

The Duramax 6.6L V-8 is a four-valve high pressure common rail direct injection diesel equipped with a diesel particulate filter to meet the stringent 2007 emissions requirements. Available in GM's Chevrolet Silverado and GMC Sierra heavy-duty trucks, the engine delivers a segment-leading 365 horsepower (272 kW) and 660 lb.-ft. of torque (895 Nm). It is also offered with increased power and torque for the Chevy Kodiak and GMC TopKick medium duty applications. Versions are available with 300 horsepower and 520 lb.-ft. of torque, as well as a new 330-horsepower option with 620 lb.-ft. of torque. The Duramax is also available in GM's full-size vans, Chevrolet Express and GMC Savana.

Buttermore said GM's market share of heavy-duty diesel pickup trucks in North America has grown from 3 percent in 2001 to nearly 30 percent with the introduction of the Duramax diesel.

"The Duramax has become a great success story, and is a world-class engine with superior quality, industry-leading horsepower and competitive fuel economy," said Buttermore.

GM established the DMAX joint venture with Isuzu Motors Limited (Isuzu 40 percent, GM 60 percent) in 1998. The 584,000-square foot DMAX plant employs 1,225 hourly and salaried employees with annual production currently at 200,000 engines.

General Motors Corp. (NYSE: GM), the world's largest automaker, has been the annual global industry sales leader for 76 years. Founded in 1908, GM today employs about 280,000 people around the world. With global headquarters in Detroit , GM manufactures its cars and trucks in 33 countries. In 2006, nearly 9.1 million GM cars and trucks were sold globally under the following brands: Buick, Cadillac, Chevrolet, GMC, GM Daewoo, Holden, HUMMER, Opel, Pontiac, Saab, Saturn and Vauxhall. GM's OnStar subsidiary is the industry leader in vehicle safety, security and information services. More information on GM can be found at www.gm.com.

SPECIFICATIONS

2007i Duramax Diesel 6.6L V-8 Turbo ( LMM )

Type:

Duramax 6.6L V-8 turbo-diesel

Displacement:

6599cc

Compression ratio:

16.8:1

Valve configuration:

overhead valves (4 valves per cylinder)

Assembly site:

Moraine, Ohio

Valve lifters:

mechanical roller

Firing order:

1 - 2 - 7 - 8 - 4 - 5 - 6 - 3

Bore x stroke:

103 x 99mm

Fuel system:

direct-injection diesel with high pressure common rail

Applications:

Horsepower: hp ( kW )

Chevrolet Silverado HD

365 hp (272kW) @ 3200 rpm

GMC Sierra HD

365 hp (272kW) @ 3200 rpm

Chevrolet Kodiak Medium Duty ( LYE option )

330 hp (246kW) @ 3000 rpm

GMC TopKick Medium Duty ( LYE option )

330 hp (246kW) @ 3000 rpm

Chevrolet Kodiak Medium Duty ( LRX option )

300 hp (224 kW) @ 3000 rpm

GMC TopKick Medium Duty ( LRX option )

300 hp (224 kW) @ 3000 rpm

Chevrolet Express

250 hp (186 kW) @ 3200 rpm

GMC Savana

250 hp (186 kW) @ 3200 rpm

Applications:

Torque: lb-ft ( Nm )

Chevrolet Silverado HD

660 lb-ft (895 Nm) @ 1600 rpm

GMC Sierra HD

660 lb-ft (895 Nm) @ 1600 rpm

Chevrolet Kodiak Medium Duty ( LYE option )

620 lb-ft (841 Nm) @ 1600 rpm

GMC TopKick Medium Duty ( LYE option )

620 lb-ft (841 Nm) @ 1600 rpm

Chevrolet Kodiak Medium Duty ( LRX option )

520 lb-ft (705 Nm) @ 1600 rpm

GMC TopKick Medium Duty ( LRX option )

520 lb-ft (705 Nm) @ 1600 rpm

Chevrolet Express

460 lb-ft. (624 Nm) @ 1600 rpm

GMC Savana

460 lb-ft. (624 Nm) @ 1600 rpm

Fuel shut off:

3250 rpm Kodiak and TopKick (medium duty)

3450 rpm Silverado and Sierra (heavy duty), Express and Savana

Emissions controls:

cooled exhaust gas recirculation, catalytic converter, diesel particulate filter (DPF) & intake throttle

MATERIALS:

Block:

cast iron

Cylinder head:

cast aluminum

Intake manifold:

cast aluminum

Exhaust manifold:

cast nodular iron with steel pipe extension

Main bearing caps:

cast nodular iron

Crankshaft:

forged steel

Camshaft:

Steel

Connecting rods:

forged steel, stress fractured

Additional features:

charge air cooling

recommended oil change interval: Per the computerized Oil Life System. Requires CJ-4 engine oil to Maximize Life

recommended coolant change interval: 5 years or 150,000 miles


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