Isuzu 6H engine

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: 7790 cc
 * Bore and stroke: 115x125 mm
 * 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 300 hp)
 * Injection: high-pressure common-rail direct injection
 * Power/torque: 200-300 hp, 520-860 lbft

6HH1


 * Displacement: 8226 cc
 * Bore and stroke: 115x132 mm
 * 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: 173-200 hp, 47-51 kg.m

6HE1


 * Displacement: 7127 cc
 * Bore and stroke: 110x125 mm
 * Aspiration: Naturally aspirated or turbocharged
 * Valvetrain: Direct injection, SOHC 24-valve
 * Compression ratio: 16.9:1
 * Injection: Direct injection
 * Power/torque: 165-260 hp, 46-77 kg.m

Vehicles

 * Isuzu F-Series
 * Chevrolet T-Series
 * Isuzu H-Series