The Isuzu 6H is a family of inline six-cylinder diesel engines 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/Duramax LG4 Displacement: Bore and stroke: Block: gray iron Cylinder head: cast iron Fuel cutoff: 2400 rpm Aspiration: Turbocharged and intercooled Valvetrain: SOHC 24-valve Compression: 17.5:1 (17.0:1 for ) Injection: high-pressure common-rail direct injection Power/torque: ,
6HH1
Displacement: Bore and stroke: Aspiration: Naturally aspirated Valvetrain: SOHC 24-valve Compression ratio: 18.5:1 Injection: Reformed Bosch, inline injection pump with automatic timer, and all-speed mechanical governor Power/torque: ,
6HE1
Displacement: Bore and stroke: Aspiration: naturally aspirated or turbocharged Valvetrain: direct injection, SOHC 24-valve Compression ratio: 16.9:1 Injection: direct injection Power/torque: ,
Engine variants
+ Model Displacement Output Notes6HE1-N 6HE1-S6HE1-TCN6HE1-TCS6HH1-N 6HH1-C6HH1-S6HL1-N 6HL1-S6HK1-TCR 6HK1-TCN6HK1-TCC6HK1-TCS6HK1-TCHDuramax LG4 7800used in GMC medium-duty trucks
Vehicles Isuzu F-Series Chevrolet T-Series Isuzu H-Series
References