Power Stroke 7.3 Liter Diesel Engines
The 7.3L Power Stroke diesel engine is:
- a four-cycle turbocharged V-8 with overhead valves.
- 7.3 liter (444 cubic inch) displacement.
- Separated into two banks, the right bank numbered 1, 3, 5, 7 and the left bank numbered 2, 4, 6, 8.
- rated at 250 horsepower for automatic transmission and 275 horsepower for manual transmission.
The 7.3L Power Stroke diesel engine cylinder block has been designed to withstand the loads of diesel operations by using:
- four-bolt main bearing caps.
- internal piston cooling oil jets.
- a forged steel crankshaft.
- heavy-duty forged steel connecting rods.
The 7.3L Power Stroke diesel engine piston is:
- made of 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 7.3L Power Stroke diesel engine camshaft is:
- supported by five 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 electronically controlled/hydraulically actuated fuel injectors.
- to locate the fuel injectors in the center of the combustion chambers between the rocker arms.
- with integral 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 engine control module (ECM).
- 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 oil filter in the oil cooler.
- powered by a 120-volt external power source.
- replaceable but not repairable.
The fuel injection system used on the 7.3L Power Stroke diesel engine:
is controlled by the powertrain control module (PCM).
- utilizes a two-stage mechanical fuel pump.
- circulates fuel through a combination fuel filter, fuel heater and water separator assembly.
- uses eight electronically controlled/hydraulically actuated fuel injectors.
- maintains operating pressures between 275-448 kPa (40-65 psi).
The 7.3 Power Stroke diesel engine lubrication system:
- is divided into two systems: the low-pressure system lubricates the engine, the high-pressure system actuates the fuel injectors.
- maintains pressures between 0-414 kPa (0-60 psi) for the low-pressure system and 4137-20,685 kPa (600-3,000 psi) for the high-pressure system.
- is cooled by an engine oil cooler.
- utilizes an oil pressure sensor and an oil pressure regulator.