The 7.3L Power Stroke diesel was developed as a the replacement for the aging 7.3L IDI.

Although the engines share identical displacements, the designs are of completely different nature and it would be incorrect to suggest that the 7.3L Power Stroke was an evolution of the IDI engine family. The Power Stroke is a turbocharged, direct injection diesel engine produced by International Navistar. The “Power Stroke” trademark belongs to Ford Motor Company, and therefore you will only find the 7.3 “Power Stroke” in Ford applications. The engine is based on International’s model T444E engine, which is identical save for some slight variances specific to Ford’s applications.

A greater demand for fuel economy and significantly lower emissions ultimately led to the retirement of the 7.3L during the 2003 model year. For the 2003 MY, the 7.3L Power Stroke was offered alongside the new, smaller 6.0L Power Stroke. By the beginning of the 2004 MY, the 6.0L Power Stroke had completely replaced the 7.3L.


Engine: 7.3L Power Stroke diesel V-8
B10 Life: 200,000 miles (~320,000 km)
B50 Life: 350,000 miles (~560,000 km)
Years Produced: 1994.5 – 2003 model years
Displacement: 7.3 liters, 444 cubic inches
Block/Head Material: Cast iron block, cast iron cylinder heads
Compression Ratio: 17.5 : 1
Firing Order: 1-2-7-3-4-5-6-8 7.3 Power Stroke cylinder numbers
Bore: 4.11 in (104.4 mm)
Stroke: 4.18 in (106.2 mm)
Aspiration: Single turbocharger, wastegated, intercooler introduced for 1999 model year
1994 – 1997: Garrett TP38
1998 – 2003: Garrett GTP38 (wastegated)
Injection: Direct injection, HEUI (hydraulic electronic unit injection). See injector code breakdown below.
Valvetrain: OHV, 2 valves per cylinder, hydraulic lifters (no valve adjustment necessary)
Oil Capacity*: 15 quarts w/ filter
(original Ford spec for 1994 was 12 quarts. The dipstick was re-calibrated for the 1995 model year to indicate a full crankcase at 14 quarts)
Engine Weight: Approx. 920 lbs dry
Peak Horsepower: • 210 hp @ 3,000 rpm (intro horsepower rating, 1994 MY)
• 275 hp @ 2,800 rpm (peak horsepower rating, 2003 MY)
Peak Torque: • 425 lb-ft @ 2,000 rpm (intro torque rating, 1994 MY)
• 525 lb-ft @ 1,600 rpm (peak torque rating, 2003 MY)
Engine Dimensions: Length: 34″ (approx)
Width: 32″ (approx)
Height: 38″ (approx)

*Some engines may not drain completely during oil change – advise filling with 13 quarts, check oil level, and add as necessary until crankcase is full. After starting and running the engine, recheck oil level and add as necessary. The high pressure oil pump reservoir retains some engine oil.