Mahle S224-3163.040 Engine Piston

Mahle Oversized Engine Piston for Ford 7.3L Diesel

The Mahle S224-3163.040 is an oversized aluminum engine piston built to OE-quality standards for Ford diesel rebuilds. It features a bowl-style piston head, compensated ring grooves for controlled ring loading, and an expansion-controlled design that helps maintain proper clearances in service.

Key Features

• Mahle OE-quality engine piston for cylinder block rebuild work
• Oversized 0.040 in. piston for precision overbore applications
• Aluminum construction for strength and thermal stability
• Bowl piston head design
• Compensated ring grooves for ring loading and oil control
• Expansion-controlled design to help reduce noise, wear, and emissions
• Top compression ring thickness: 3.00 mm
• Second compression ring thickness: 2.00 mm
• Oil ring thickness: 3.50 mm
• Piston pin outside diameter: 33.233 mm

Detailed Description

Mahle S224-3163.040 is an oversized replacement piston for Ford diesel engine rebuilds that require a 0.040 in. overbore. The bowl head profile, aluminum construction, and OE-style ring groove design support accurate fitment and consistent combustion chamber geometry during engine service. This piston is listed for 1995-2003 Ford E-350 Econoline Club Wagon, E-350 Econoline, E-350 Club Wagon, E-350 Super Duty, Excursion, F-250, F-250 HD, F-250 Super Duty, F-350, and F-350 Super Duty applications. For these Ford E-350 Super Duty and F-250 Super Duty diesel rebuild applications, the part number S224-3163.040 is a direct match to the specified oversized piston requirement.

Mahle is a major OE piston manufacturer, and this piston reflects that background with controlled expansion and ring groove engineering aimed at maintaining proper oil control and reducing operating noise in rebuilt engines. If you are rebuilding a Ford F-350 Super Duty or Excursion engine and need an oversized piston with OE-style dimensions, S224-3163.040 is built for that service.

What It Helps Address

• Worn or scored cylinder bores that require an oversized piston
• Loss of compression from piston wear or damage
• Excessive oil consumption related to ring seal issues
• Combustion noise caused by improper piston-to-bore clearance
• Engine rebuilds that require OE-style piston geometry

Installation Notes and Tips

• Verify the cylinder bore has been machined for a 0.040 in. oversize piston before installation.
• Use the specified ring set for this application: ring #41768.040.
• This piston is listed as piston without rings and should be matched with the correct ring package during assembly.
• Confirm pin diameter, compression height, and bowl profile against the engine build sheet before final assembly.
• Follow standard engine-cleaning, measuring, and break-in procedures during rebuild work.

Quality Assurance

Mahle manufactures OE and OE-style pistons for engine service, and this part is built with the same core design features used in factory applications, including compensated ring grooves and expansion control for consistent fit and oil control.