Mahle S224-3709.020 Engine Piston

OE-Quality Oversized Engine Piston

MAHLE S224-3709.020 is an oversized engine piston built for applications that require precise cylinder fit and controlled ring loading. It uses an aluminum construction with a bowl-style piston head and is specified for Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD engine rebuilds.

MAHLE is a major OE piston manufacturer, and this piston reflects that background with expansion-controlled design features that help maintain small fitting clearances. The result is a piston engineered for consistent oil control, reduced wear, and lower engine noise in the correct oversized service application.

Key Features

• Oversized 0.020 in. service piston for precision rebuild work
• Aluminum piston construction with a bowl head design
• Compensated ring grooves for proper ring loading and oil control
• Expansion-controlled design for tight fitting clearances
• Fits Chevrolet and GMC heavy-duty truck applications listed below

Detailed Description

MAHLE S224-3709.020 is an OE-quality piston for engine service where oversize machining is required. The compensated ring grooves and expansion-controlled profile are intended to support stable ring seating, oil control, and reduced operating noise when installed in the correct bore size. This part number, S224-3709.020, is used in a range of Chevrolet Silverado and GMC Sierra heavy-duty applications, including 2006-2010 Chevrolet Silverado 2500 HD and 2007-2010 GMC Sierra 3500 HD. It is also listed for Chevrolet Express and GMC Savana van applications in the same service family.

This part cross-references with a matching ring set application, including 42160.020, for the same service family.

What It Is Used For

• Restoring compression in an engine that has been bored for oversize service
• Addressing oil control issues caused by worn piston and ring surfaces
• Replacing a damaged piston during a rebuild
• Correcting noise or wear associated with improper piston-to-cylinder clearance

Installation Notes and Tips

Verify bore size, ring selection, and bank location before installation. Fitment notes specify left-bank use and a 0.020 in. oversize service application. This piston is listed without rings, so confirm the correct ring set and related machining requirements before assembly. Use the part number S224-3709.020 to match the correct service specification.

Quality Assurance

MAHLE pistons are produced to OE-quality standards and draw on the company’s position as one of the world’s largest OE piston manufacturers. The design emphasizes controlled expansion, ring groove accuracy, and oil control for service applications that require precise fitment.