A History of Engine Compliance and Isuzu's Advanced Engine Technology

In 1984, Isuzu entered the American commercial vehicle market with a truck called the KS22. This vehicle had an 11,000 lb gross vehicle weight rating, and was powered by a naturally aspirated 4BD-1 engine that produced 87 hp. At that time, U.S. EPA emissions standards limited heavy duty diesel engines to Oxide of Nitrogen (NOx) emissions of 10.7 g/bhp-hr. Also, there was no brake specific Particulate Matter (PM, or smoke) limit. Instead, engine smoke emissions were measured using an opacity meter. This was a method to visually measure how “black” an engine’s black smoke was. Opacity was limited to a maximum of 20% during acceleration, 15% under engine lug conditions, and 50% under any operating conditions.

How Engine Emissions are Created

Engines emit Oxides of Nitrogen (NOx) that form ozone in the atmosphere. These oxides are produced in the cylinder of an engine during the high temperatures of combustion. The resulting ozone is responsible for the smog seen in many major cities, and creates negative health impacts. Diesel engines also emit particulate matter (PM), emissions commonly referred to as soot, further contributing to harmful health issues. Because of these severe health impacts, EPA started a long process to radically reduce heavy duty engine emissions, starting with the 1988 model year. This year also marked the first year of brake specific PM emissions measurements, instead of the old smoke opacity measurements. In 1988, a new limitation was placed on heavy-duty diesel emissions. As a result of this requirement, NOx emission levels were reduced 62% and PM emissions were reduced 83% from 1988 to 1998.

Isuzu Meets the Emissions Challenge with Increased Performance and Economy

During this time, Isuzu responded to these emissions challenges by incorporating a series of design upgrades to the basic 4BD engine. By 1988, turbocharging had not only allowed engine output to increase to 126hp and 242 lbs-ft of torque, but had also helped reduce particulate matter emissions and improve fuel economy. In 1992, a new indirect injection fuel system and charge air-cooling allowed power output to be further improved to 135hp and 255 lbs-ft of torque, while again reducing particulate matter and NOx emissions and improving fuel economy. This extra power also allowed an increase in maximum GVWR to 14,250 lbs.

To meet 1998 emissions levels (4.0 g/bhp-hr NOx and 0.10 g/hbp-hr PM); Isuzu introduced a new 4HE1-TC engine. Featuring 175hp and 347 lbs-ft of torque, the 4HE1 was the most powerful and the cleanest diesel engine Isuzu had ever installed in N-Series trucks, and allowed maximum gross vehicle weight rating to be increased to 16,500 lbs. This new engine also featured a B10 life rating of 310,000 miles, meaning that after 310,000 miles, 90% of the engines sold are still running fine.

Dual Fuel Tank

• Additional 33 Gal. tank mount on left hand side of frame
• Available for:
  • 2009 MY and 2010 MY N-Series Diesel
  • In-rail fuel tank required
  • 132.5-176" wheelbase
  • Standard or Crew Cab

Smoker's Package Dealer Options

• Adds door-mounted ashtrays

Rear Body Dome Lamp Switch Port Installed Option

• Provides in-cab switching for rear body dome lamp

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Accommodates numerous bodies

• Wheelbases ranging from 109 to 176 inches on lighter capacity models and up to 212 in. on heavy GVWR models
• Body lengths ranging from 12 to 24 feet
• Van bodies, insulated/refrigerated bodies, utility bodies, stake bodies, landscaping bodies, sweepers, garbage packers, wrecker/rollback bodies, and many more

Gas and Diesel Engine

• 5.2L 4HK1-TC turbo/intercooled diesel with 205 hp/441 lb.-ft. torque has the most power and torque in its class
• 6.0L GMPT Vortec 6000 V8 SFI gasoline: 325 hp/360 lb.-ft. torque
• Gas engine can save customers approximately $3500 over the cost of comparable diesel models

Strong, reliable powertrain

• Isuzu diesel model has standard Aisin 6-speed electronic double overdrive automatic that provides fuel efficiency and performance
• Isuzu gas model has standard 4L80-E Hydra-Matic 4-speed automatic with lock-up torque converter and overdrive for gas models

Best-in-class turning diameter

• Turning circle as tight as 33 feet curb-to-curb (109-inch wheelbase)

Two crew cab models

• 12,000*, 14,500 and 17,950** lb. GVWR
• 150 and 176-inch wheelbases
• Greater flexibility
• Accommodates more body lengths than the competition

Peace of Mind

• Diesel models provide standard 36 Month, unlimited mileage warranty***
• Gas models provide standard 36 Month, 36,000 mile warranty and 60 Month, 75,000 mile power train warranty***
• Variety of extended warranty options
• Priority Service Maintenance Program provides factory backed, scheduled maintenance

*12,000 GVW Gas Only
** 17,950 GVW Diesel Only
***See dealer for specific warranty details and coverage

Exclusive

• 12,000 lb. GVWR Diesel and Gas LCF* 50-State Certified
• Over 400,000 Diesel LCF trucks sold in the U.S. since 1985
• 83% are still registered and on the road today (R.L. Polk)
• 50,000 Gas LCF trucks produced in the U.S.

Contemporary Style Cab

• Cab is bigger inside then competitors
• High-quality chrome badging and optional front grille
• Sleek, flush-mounted headlamps, cornering lamps and turn signals
• Steel reinforced, composite covered front bumper
• Composite engine cover provides a cleaner, more finished rear-of-cab

Driver comfort on the inside

• Seat adjustable for all types of drivers
• Tricot breathable cloth material is durable and comfortable
• High stain and tear resistance for longer life

More standard features then competitors

• Heavy-duty rubber floormat
• Power windows and door locks
• Tachometer to assist in PTO operation
• Standard cruise control
• Plenty of room for body builder switches and controls

Protection to provide reliability and durability

• Donaldson polypropylene air cleaner (on diesel single cab)
• Air cleaner uses large paper element with more surface area for better filtering, longer life, is corrosion resistant, and is easy to service

NRR 19,500 GVWR chassis advantages vs. the competition

• Offers 1,000 lb. more payload than Ford F-550
• Offers 1,100 lb. more payload than UD2000
• Costs thousands less than comparable UD2000

Extensive range of GVWRS (lb.)

• 12,000–19,500 lb. GVWR Diesel
• 12,000 and 14,500 lb. GVWR Gas