Engine Description

The 6.0L diesel engine is:

• a 4-cycle turbocharged V-8 with overhead valves.
• 6.0 liter (365 cubic inch) displacement.
• separated into 2 banks, the right bank numbered 1, 3, 5, 7 and the left bank numbered 2, 4, 6, 8.
• rated at 325 horsepower and 570 lb-ft torque.

The cylinder block has been designed to withstand the loads of diesel operations by using:

• a 2-piece crankcase.
• internal piston cooling oil jets.
• a forged steel crankshaft.
• powdered metal, fractured connecting rods.

The piston is:

• made of an aluminum alloy.
• fitted with an upper keystone compression ring.
• fitted with a lower rectangular compression ring.
• fitted with oil control rings.

The piston pins are:

• a free-floating type, permitting the piston pin to move/float freely in the piston pin bore.
• retained in the piston by piston pin retainers.

The camshaft is:

• supported by 5 insert-type camshaft bearings.
• of the roller camshaft design.
• driven by the crankshaft through the use of the crankshaft gear and the camshaft gear.

The hydraulic valve tappets:

• minimize engine noise.
• maintain zero valve lash.
• incorporate camshaft follower guides.
• incorporate a roller follower design that reduces camshaft wear.

The cylinder heads are designed:

• to incorporate electro-hydraulic fuel injectors.
• to locate the fuel injectors in the center of the combustion chambers between the rocker arms.
• with external high pressure oil galleries.

The glow plug system is:

• designed to preheat the cylinders for faster cold weather starts and smoke reduction.
• controlled by the powertrain control module (PCM) and glow plug control module.
• mounted directly into the cylinder heads.

The optional block heater is:

• designed to heat the engine coolant and oil for improved cold weather starts.
• located near the starter.
• powered by a 120-volt external power source.
• replaceable, but not repairable.

The fuel injection system used on the engine:

• is controlled by the PCM and fuel injector control module.
• utilizes a frame-mounted horizontal fuel conditioning module.
• circulates fuel through a combination fuel filter, fuel heater and water separator assembly.
• uses 8 electro-hydraulic fuel injectors.
• has a secondary fuel filter mounted on the engine.
• has a fuel pressure regulator mounted in the secondary fuel filter housing.

The engine lubrication system:

• is divided into 2 systems: the low-pressure system lubricates the engine, the high pressure system actuates the fuel injectors.
• is cooled by an engine oil cooler.
• utilizes an engine oil pressure (EOP) sensor and an oil pressure regulator.