Mahle S224-3503.020 Engine Piston

OE-Style Oversized Piston for Ford Diesel Applications

The Mahle S224-3503.020 is an oversized aluminium engine piston built for Ford Super Duty diesel applications that require a 0.020 in oversize service part. It features a bowl-style piston head, coated skirt, and OE-focused design details that support ring control, oil control, and consistent engine operation. This Mahle piston is a direct-fit service option for Ford E-350 Super Duty, F-250 Super Duty, F-350 Super Duty, E-350 Club Wagon, and Excursion applications listed below.

• Oversized 0.020 in service piston for select Ford diesel engines
• Aluminium construction for strength and heat management
• Bowl piston head design
• Coated skirt for reduced friction during operation
• Compensated ring groove design for proper ring loading and oil control
• Expansion-controlled design for tighter fitting clearances and quieter operation
• Mahle part number S224-3503.020

Detailed Product Overview

Mahle designs this piston to OE standards, using features commonly found in original equipment applications. The compensated ring grooves help maintain ring loading and oil control, while the expansion-controlled piston profile supports small fitting clearances that can reduce noise, wear, and emissions. The bowl head configuration and oversize dimensions make the Mahle S224-3503.020 a practical choice for engine rebuilds that require precise service sizing. This part number, S224-3503.020, is used in Ford E-350 Super Duty and Ford F-250 Super Duty diesel engine service where a 0.020 in oversize piston is specified.

Vehicle Fitment

• Fits 2004-2010 Ford E-350 Super Duty, N/A. Notes: Size 0.020in; piston without rings; skirt coated; compression standard; piston qualifier 1845521C1; use ring # 41940.020.
• Fits 2004-2007 Ford F-250 Super Duty, N/A. Notes: Size 0.020in; piston without rings; skirt coated; compression standard; piston qualifier 1845521C1; use ring # 41940.020.
• Fits 2004-2007 Ford F-350 Super Duty, N/A. Notes: Size 0.020in; piston without rings; skirt coated; compression standard; piston qualifier 1845521C1; use ring # 41940.020.
• Fits 2004-2005 Ford E-350 Club Wagon, N/A. Notes: Size 0.020in; piston without rings; skirt coated; compression standard; piston qualifier 1845521C1; use ring # 41940.020.
• Fits 2003-2005 Ford Excursion, N/A. Notes: Size 0.020in; piston without rings; skirt coated; compression standard; piston qualifier 1845521C1; use ring # 41940.020.

Common Repair Uses

• Restoring cylinder sealing during a diesel engine rebuild
• Correcting wear in engines that require an oversize piston
• Addressing piston skirt wear or scoring found during teardown
• Replacing a damaged piston in Ford Super Duty diesel service
• Supporting proper ring control and oil management after machining

Installation Notes

Verify bore size, piston-to-wall clearance, and ring selection before assembly. This piston is listed as piston without rings, so confirm the correct ring set for the application before installation. Match the piston qualifier and engine specifications to the vehicle service information, and inspect the cylinder block, connecting rod, and related wear surfaces during rebuild work. For Ford E-350 Super Duty, F-250 Super Duty, and F-350 Super Duty applications, confirm the 0.020 in oversize requirement before final assembly.

Quality Assurance

Mahle is a major OE piston manufacturer, and this piston is built with OE-quality design features for service replacement use. The S224-3503.020 follows the same type of engineering approach used in original equipment piston applications, including controlled expansion and ring-groove design for consistent operation.