Engineering:Isuzu 6H Engine

The Isuzu 6H is a family of inline-6 cylinder Diesel engine installed in Isuzu medium duty trucks, and also installed in GM medium-duty trucks as the Duramax LG4. It is mated to the Allison 2500, 3000 and 3500 Series transmissions.

Engine Specifications (6HK1 engines)

• Engine type: 7,785 to 7,790 cc (475.1 to 475.4 cu in) I6 turbo
• Bore and stroke: 115 mm (4.53 in) x 125 mm (4.92 in)
• Block: gray iron
• Cylinder head: cast iron
• Fuel cutoff: 2400 rpm
• Aspiration: Turbocharged and Intercooled
• Valvetrain: SOHC, 24 Valve
• Compression: 17.5:1 (17:1 for 300 hp motor)
• Injection: high-pressure common-rail direct injection
• Power / Torque: 200 bhp (150 kW) to 300 bhp (220 kW), 520 lb⋅ft (705 N⋅m) to 860 lb⋅ft (1,166 N⋅m)

Engine Families

6HE1-N 7127cc 165PS

6HE1-S 7127cc 195PS

6HE1-TCN 7127cc 220PS

6HE1-TCS, 7127cc 250PS

6HH1-N 8226cc 175PS

6HH1-C 8226cc 185PS

6HH1-S 8226cc 210PS

6HL1-N 7166cc 180PS

6HL1-S 7166cc 205PS

6HK1-TCR 7790cc 205PS

6HK1-TCN 7785cc 240PS

6HK1-TCC 7790cc 260PS

6HK1-TCS 7790cc 280PS

6HK1-TCH 7790cc 300PS

Duramax LG4 7800 7790cc 275PS (Used In GMC medium-duty trucks)

Vehicles

• Chevrolet T-Series
• Isuzu F-Series
• Isuzu H-Series