Announces Production of New 4.5-Liter Duramax Diesel V8 for Light
By: Mike LevinePosted:
06-15-07 11:50 PT
© 2007 PickupTruck.com
#1: 06-24-07 23:47 PT
News is reporting,
"With a 4.5-liter diesel, a six-speed automatic and a
couple of other tweaks, [a two-wheel drive Chevrolet Silverado]
can achieve close to 30 mpg highway."
the same story, the 4.5-liter is compared to the existing 5.3-liter
gas V8, that's rated at 22-mpg highway.
let's take out the calculator.
that diesel fuel continues to enjoy its current $.20 cost advantage
over regular unleaded gas - a long shot given home heating
oil demand, but let's use for sake of argument - and that the
4.5-liter achieves 29-mpg while carrying a $5,700 price premium
over the gas engine, it would take approximately 135,000-miles
to break even on the new diesel engine. That's not an unreasonable
amount of miles to rack up on a full size pickup - especially
one used for work. And there's bound to be even greater value
for a 4.5-liter buyer if they tow or haul often versus the
may be some help available from the federal government to
reduce the baby DMAX's price premium. At least for first year
to the American
Council for an Energy Efficient Economy (ACEEE),
each automaker has a limited number (60,000) of tax credits
that can be earned by consumers for vehicles that achieve
greater fuel economy and save fuel. The credits last through
2010 for diesel vehicles meeting Tier 2 Bin 5 emissions requirements.
economy improvement is measured against a weight-dependent,
model year 2002 baseline, with tiered credits starting at 25%
over the baseline fuel economy. With each 25% improvement over
the baseline fuel economy up to a maximum of 250%, the tax
credit increases by $400.
credit", designed to boost the amount of credit available for
vehicles in the heavier weight classes, is available as well.
A vehicle qualifies for the credit if it is expected to save
at least 1,200 gallons over its lifetime relative to a vehicle
achieving the baseline fuel economy for that weight class. For
each additional 600 gallons of gasoline savings up to a maximum
of 3,000 gallons, the vehicle earns $250 in tax credits.
the two components, the maximum available credit is $3,400.
However, once a manufacturer sells 60,000 qualifying vehicles,
the tax credit is phased out over a period of fifteen months
for vehicles that manufacturer produces.
estimating that 4.5-liter buyers could qualify for at least
$650 in tax credits.
Motor's Tonawanda plant, just outside Buffalo, New York, will be the
birthplace of GM's new 4.5-liter Duramax Diesel V8. The automaker
is investing $100-million in the facility to produce the new engine.
emissions light duty oil burner will find a place in the engine compartments
of the Chevrolet Silverado and GMC Sierra half-ton pickups by the 2010
model year. It's expected to be rated in excess of 310-horsepower and
520 pound-feet of torque. In comparison, the 6.6-liter Duramax, currently
used in GM's heavy duty pickup, is
rated at 365-hp / 660 lb-ft.
powertrain spokesperson Tom Reid tells PickupTruck.com that even though
it shares the Duramax name with the older 6.6-liter engine - which
has been engineered and produced in partnership with Isuzu Motors -
the new diesel is 100% designed by GM and will be built without Isuzu's
rival, Toyota, became an investor in Isuzu last year, which gave it
access to the same engineers that helped develop the 6.6-liter engine.
Duramax is expected to help General Motors keep its lead in light duty
pickup fuel economy and appeal to both commercial and lifestyle truck
buyers looking to save money at the pump. The cost of diesel fuel has
recently had up to a $.50 cent per gallon cost advantage over gasoline
in certain parts of the U.S..
says, "We haven't determined what percentage of sales the new
engine will be, but we know it's destined to be popular."
press release below:
TONAWANDA, N.Y. – General
Motors Corp. will introduce a new, state-of-the-art 4.5L V-8 Duramax
turbo-diesel that improves engine fuel efficiency by 25 percent, reduces
CO2 emissions by 13 percent and cuts particulates and NOx emissions
by at least 90 percent for North American light duty trucks and the
HUMMER H2 built after 2009.
V-8 diesel is expected to deliver class-leading torque, power and refinement
while maintaining a significant fuel efficiency advantage over comparable-output
dual-overhead cam, four-valve V-8 diesel engine will fit within the
same space of a small-block V-8 gasoline engine. This compact size
is made possible by using integral cylinder head exhaust manifolds,
integral cam cover intake manifolds and a narrow block.
“This new GM light duty diesel is expected to become a favorite
among customers who require excellent towing ability and fuel efficiency,” said
Tom Stephens, group vice president, GM Global Powertrain and Quality. “It
will meet the stringent 2010 emissions standards, and it will be compliant
in all 50 states, making it one of the cleanest diesel vehicles ever
benefits of the new engine include a 13-percent reduction in CO2 versus
gasoline engines, and at least a 90-percent reduction in particulates
and NOx compared to diesel vehicles today. This will be GM’s first engine to use a selective catalytic reduction
NOx aftertreatment system with a diesel particulate filter to help achieve
the Tier 2 Bin 5 and LEV 2 emissions standards.
highlights of the engine include aluminum cylinder heads with integrated
manifolding; a variable-vane turbocharger with intercooling; a Compacted
Graphite Iron (CGI) block for a stronger and lighter engine base (compared
to lower-strength aluminum or heavier grey cast iron); and fracture-split
main bearing caps and connecting rods for a precise fit. An electronically
controlled, ultra-high-pressure, common-rail fuel system is used, which
has the ability to inject fuel five times per combustion event to control
noise and emissions.
“This new V-8 is not only a clean diesel meeting the toughest
emissions requirements in North America, it also delivers an effortless
performance feel because of its high torque across the speed range,” said
Charlie Freese, executive director of GM Powertrain Diesel Engineering. “It
is also significantly quieter than other diesels on the road today, with
noise and vibration performance approaching gasoline V-8 levels.”
said the new V-8’s compact size enables it to fit in the
envelope of a gasoline small-block engine, which provides GM the flexibility
to introduce this engine in a wide variety of vehicle applications should
there be future market demand.
V-8 diesel engine is expected to deliver class-leading refinement,
horsepower and torque and fulfill multiple vehicle applications with
ratings in excess of 310 horsepower and 520 lb-ft of torque.
GM (Opel, Saab, Vauxhall and GMDAT ) currently offers 17 diesel engine
variants in 45 vehicle lines around the world. GM sells more than one
million diesel engines annually, with products that offer a range of
choices from the 1.3L four-cylinder diesel engine sold in the Opel Agila
and Corsa, up to the 6.6L V-8 Duramax diesel sold in full-size vans,
heavy duty pickups and medium duty trucks in the U.S.
introduced the Duramax diesel 6.6L V-8 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 pickup truck
market share has jumped nearly tenfold in the six years that Duramax
engines have been offered.