No longer is the 7.3 popular (or made, it seems). It was replaced by the 6.0 in the last decade because people had new emissions rules and also wanted more fuel economy.
But it was popular. So popular there are more serial numbers for Powerstroke models than any competing diesels at the time. They sold over 2 million of these by 2002.
According to the Powerstroke Hub, “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.”
But the 6.0 replacement had a bunch of problems, and there were recalls and it had its problems: blown head gaskets, cracked EGR coolers, failed EGR valves, sticking turbos and bad injectors, just to name a few.
Specs of the Power Stroke 7.3 and 6.0
7.3L Power Stroke:
Displacement: 444ci
Bore: 4.11 inches
Stroke: 4.18 inches
Valvetrain: Overhead valve, 2 valves per cylinder
Compression Ratio: 17.5:1
Factory Horsepower: 210hp (1994.5) to 275hp (2003)
Factory Torque: 425 lb-ft (1994.5) to 525 lb-ft (2003)
6.0L Power Stroke:
Displacement: 365ci
Bore: 3.74 inches
Stroke: 4.13 inches
Valvetrain: Overhead valve, 4 valves per cylinder
Compression Ratio: 18.0:1
Factory Horsepower: 325hp
Factory Torque: 560 lb-ft (2003-2004) to 570 lb-ft (2005-2007)
