
Standard Features
(U.S. EPA Current Tier Certified)
- Displacement: 5.2 L or 7.8 L
- Turbocharged charge air cooled
- Peak torque: 496.5 LB/FT – 796.5 LB/FT
- Fuel consumption: .342 LB/HP-HR
- SAE #2 or SAE #3 flywheel housing
- Electric self-priming fuel lift pump
- 12V or 24V electronics
- Glow plug starting aid
- High angularity oil pan
- 500-hour service intervals
- 5-year / 5,000-hour limited warranty*
*Years or hours of service, whichever comes first. Please see your authorized Isuzu distributor or dealer for warranty and other details.

Please note the data below is not applicable for Isuzu truck / commercial vehicle applications. For specifications related to an Isuzu truck / commercial vehicle application please refer to your owner’s manual.
Available Current Tier Certified Models
Main Specifications
Displacement | 5.2L (317.3 cu in) |
Cylinders | 4 |
Cycle | 4 Stroke |
Cooling System | WATER COOLED (RECOMMENDED O.A.T.) |
Valvetrain | OHC |
Injection | DIRECT INJECTED |
Aspiration | TURBOCHARGED CHARGED AIR COOLED |
Fuel | DIESEL |
Dry Weight | 530kg (1168.5lbs) |
Coolant Capacity (Block) | 14.0L (14.8 qt.) |
Oil Capacity | 20.5L (21.7 qt.) Not applicable for Isuzu truck / commercial vehicle applications |
Horsepower | 127.5 kW (171 HP) @ 1800 RPM Constant |
140.2 kW (188HP) @ 2000 RPM Variable | |
Dimensions - L x W x H (4HK1) | 1033mm x 929mm x 1040mm (40.7in x 36.6in x 40.9in) |
Emissions | U.S. EPA Final Tier 4 |
EU Stage V is available |
Isuzu REDTech™ 4H Lit Sheet
Displacement | 7.8L (476.0 cu in) |
Cylinders | 6 |
Cycle | 4 Stroke |
Cooling System | WATER COOLED (RECOMMENDED O.A.T.) |
Valvetrain | OHC |
Injection | DIRECT INJECTED |
Aspiration | TURBOCHARGED CHARGED AIR COOLED |
Fuel | DIESEL |
Dry Weight | 623kg (1373.5lbs) |
Coolant Capacity (Block) | 14.5L (15.3 qt.) |
Oil Capacity | 38.0L (40.2 qt.) Not applicable for Isuzu truck / commercial vehicle applications |
Horsepower | 193.9 kW (260HP) @ 1800 RPM Constant |
210.3 kW (282HP) @ 1900 RPM Variable | |
Dimensions - L x W x H (6HK1) | 1348.9mm x 790.5mm x 1074.3mm (53.1in x 31.1in x 42.3in) |
Emissions | U.S. EPA Final Tier 4 |
EU Stage V is available |
Isuzu REDTech™ 6H Lit Sheet
- 4HK1
-
Displacement 5.2L (317.3 cu in) Cylinders 4 Cycle 4 Stroke Cooling System WATER COOLED (RECOMMENDED O.A.T.) Valvetrain OHC Injection DIRECT INJECTED Aspiration TURBOCHARGED CHARGED AIR COOLED Fuel DIESEL Dry Weight 530kg (1168.5lbs) Coolant Capacity (Block) 14.0L (14.8 qt.) Oil Capacity 20.5L (21.7 qt.) Not applicable for Isuzu truck / commercial vehicle applications Horsepower 127.5 kW (171 HP) @ 1800 RPM Constant 140.2 kW (188HP) @ 2000 RPM Variable Dimensions - L x W x H (4HK1) 1033mm x 929mm x 1040mm (40.7in x 36.6in x 40.9in) Emissions U.S. EPA Final Tier 4 EU Stage V is available Isuzu REDTech™ 4H Lit Sheet - 6HK1
-
Displacement 7.8L (476.0 cu in) Cylinders 6 Cycle 4 Stroke Cooling System WATER COOLED (RECOMMENDED O.A.T.) Valvetrain OHC Injection DIRECT INJECTED Aspiration TURBOCHARGED CHARGED AIR COOLED Fuel DIESEL Dry Weight 623kg (1373.5lbs) Coolant Capacity (Block) 14.5L (15.3 qt.) Oil Capacity 38.0L (40.2 qt.) Not applicable for Isuzu truck / commercial vehicle applications Horsepower 193.9 kW (260HP) @ 1800 RPM Constant 210.3 kW (282HP) @ 1900 RPM Variable Dimensions - L x W x H (6HK1) 1348.9mm x 790.5mm x 1074.3mm (53.1in x 31.1in x 42.3in) Emissions U.S. EPA Final Tier 4 EU Stage V is available Isuzu REDTech™ 6H Lit Sheet

H-SERIES
Standard Features
(Lesser Regulated Countries)
- Displacement: 5.2L or 7.8 L
- Turbocharged or turbocharged charge air cooled
- Peak torque: 854 LB/FT @ 1500 RPM
- Fuel consumption: .342 LB/HP-HR
- Flywheel housing: SAE 2
- Electric self-priming fuel lift pump
- 12V or 24V electronics
- Glow plug starting aid
- High angularity oil pan
- 500-hour service intervals
- 5-year / 5,000-hour limited warranty*
*Years or hours of service, whichever comes first. Please see your authorized Isuzu distributor or dealer for warranty and other details.
Available LRC Models
(Lesser Regulated Countries)
Main Specifications
Displacement | 5.2L (317.3 cu in) |
Cylinders | 4 |
Cycle | 4 Stroke |
Cooling System | WATER COOLED (RECOMMENDED O.A.T.) |
Valvetrain | OHC |
Injection | DIRECT INJECTED |
Aspiration | TURBOCHARGED OR CHARGED AIR COOLED |
Fuel | DIESEL |
Dry Weight | 470kg (1036.2lbs) |
Coolant Capacity (Block) | 14.0L (14.8 qt.) |
Oil Capacity | 20.5L (21.7 qt.) |
Horsepower | 132.9kW (178.2HP) @ 1800 RPM Constant |
151.4kW (203HP) @ 2100 RPM Variable | |
Dimensions - L x W x H (4HK1) | 947mm x 776mm x 994.8mm (37.3in x 30.6in x 39.2in) |
Emissions | U.S. EPA Tier 3 |
EC Stage IIIa |
Displacement | 7.8L (476.0 cu in) |
Cylinders | 6 |
Cycle | 4 Stroke |
Cooling System | WATER COOLED (RECOMMENDED O.A.T.) |
Valvetrain | OHC |
Injection | DIRECT INJECTED |
Aspiration | TURBOCHARGED OR CHARGED AIR COOLED |
Fuel | DIESEL |
Dry Weight | 623kg (1373.5lbs) |
Coolant Capacity (Block) | 14.5L (15.3 qt.) |
Oil Capacity | 38.0L (40.2 qt.) |
Horsepower | 204.3kW (274HP) @ 1800 RPM Constant |
218.5kW (293HP) @ 2000 RPM Variable | |
Dimensions - L x W x H (6HK1) | 1348.9mm x 790.5mm x 1074.3mm (53.1in x 31.1in x 42.3in) |
Emissions | U.S. EPA Tier 3 |
EC Stage IIIa |
- 4HK1 LRC
-
Displacement 5.2L (317.3 cu in) Cylinders 4 Cycle 4 Stroke Cooling System WATER COOLED (RECOMMENDED O.A.T.) Valvetrain OHC Injection DIRECT INJECTED Aspiration TURBOCHARGED OR CHARGED AIR COOLED Fuel DIESEL Dry Weight 470kg (1036.2lbs) Coolant Capacity (Block) 14.0L (14.8 qt.) Oil Capacity 20.5L (21.7 qt.) Horsepower 132.9kW (178.2HP) @ 1800 RPM Constant 151.4kW (203HP) @ 2100 RPM Variable Dimensions - L x W x H (4HK1) 947mm x 776mm x 994.8mm (37.3in x 30.6in x 39.2in) Emissions U.S. EPA Tier 3 EC Stage IIIa - 6HK1 LRC
-
Displacement 7.8L (476.0 cu in) Cylinders 6 Cycle 4 Stroke Cooling System WATER COOLED (RECOMMENDED O.A.T.) Valvetrain OHC Injection DIRECT INJECTED Aspiration TURBOCHARGED OR CHARGED AIR COOLED Fuel DIESEL Dry Weight 623kg (1373.5lbs) Coolant Capacity (Block) 14.5L (15.3 qt.) Oil Capacity 38.0L (40.2 qt.) Horsepower 204.3kW (274HP) @ 1800 RPM Constant 218.5kW (293HP) @ 2000 RPM Variable Dimensions - L x W x H (6HK1) 1348.9mm x 790.5mm x 1074.3mm (53.1in x 31.1in x 42.3in) Emissions U.S. EPA Tier 3 EC Stage IIIa