Isuzu 6HK1-TC

The Isuzu 6HK1-TC is a modern common-rail diesel engine used primarily in Isuzu F-Series trucks, but also in the Cheverolet T-Series and GMC T-Series. This engine varied in levels of tune from 200 to 300 horsepower, and from 520 to 860 pound-feet of torque. The durability of this engine is apparent in its B10 rating of 400,000 miles, meaning only 10% of those produced require an overhaul before 400,000 miles.

6H Features

• Dry Sleeved Cylinders - Precision machined allows for easy replacement
• Nitrided Crankshaft Heat treatment for durability
• Common Rail Injection, requires less oil
• Internal Piston Cooling Channels
• Gear Type oil pump, most dependable
• Internal engine oil pump, less likely to leak
• Oil Thermostat
• 2 Coolant Thermostats
• 4 valves per cylinder for more precise control
• Overhead cam design, fewer parts

6H Specifications

Number of Cylinders	6
Displacement	475 cu. in. (7.8L)
Bore & Stroke	4.25" x 4.92" (11.48cm x 12.5cm)
Compression Ratio	17.5:1 (17.0:1 for 300 hp model)
Dry Weight, without clutch	1250 lbs. (567 kg.)
Fuel Grade Requred	No. 2 Diesel
Taxable Horsepower -SAE -AMA	40.92 hp (30.5kw)
Low Idle (rpm)	630
Altitude Capability	10,000 ft. (3048 m)
Governed Full Load Setting	2400