Mahle S41940 Engine Piston Ring Set

Overview of Mahle Engine Piston Ring Set S41940

The Mahle Engine Piston Ring Set S41940 is designed for reliable performance in Ford heavy-duty vehicles. Engineered to meet precise bore diameter specifications, this piston ring set supports optimal engine compression and oil control for models like the Ford E-350 Club Wagon and F-350 Super Duty.

• Bore Diameter: 3.7402 inches for exact cylinder fit
• Premium item grade ensuring durability and wear resistance
• Oil ring assembly features a 2-piece groove type made from cast iron
• Oil ring thickness (axial height) of 0.1353 inches for effective oil control
• Plasma-moly coating on piston ring face for enhanced wear protection
• Standard piston ring oversize for direct replacement
• Second ring made of cast iron with 0.0779 inch thickness
• Top ring constructed from carbon steel with 0.0901 inch thickness

Technical Details and Material Composition

This Mahle piston ring set (part number S41940) is crafted with a combination of cast iron and carbon steel materials to balance strength and flexibility. The oil ring assembly’s 2-piece groove design, made from cast iron, provides efficient oil scraping and retention, reducing oil consumption and emissions. The plasma-moly coating on the piston ring face enhances wear resistance and helps maintain a tight seal under high-temperature conditions. The standard oversize dimension ensures compatibility with factory cylinder bore sizes, making it suitable for direct replacement in Ford E-350 Super Duty and F-250 Super Duty engines.

Compatible Ford Models and Applications

This piston ring set is compatible with several Ford heavy-duty models, including:

• Ford E-350 Club Wagon
• Ford E-350 Super Duty
• Ford Excursion
• Ford F-250 Super Duty
• Ford F-350 Super Duty

Common Engine Issues Addressed

• Reduced engine compression due to worn piston rings
• Excessive oil consumption from ineffective oil ring sealing
• Increased blow-by gases affecting engine performance
• Wear and scoring on cylinder walls impacting engine efficiency
• Loss of power and fuel economy related to piston ring failure

Installation Notes and Tips

When installing the Mahle S41940 piston ring set, ensure the cylinder bore diameter matches the specified 3.7402 inches for proper fitment. Carefully follow manufacturer torque specifications and ring orientation guidelines to maintain engine integrity. It is recommended to inspect cylinder walls for wear or damage before installation and to replace piston rings in matched sets to ensure balanced engine performance.

Quality Assurance and Warranty

Mahle maintains strict quality control standards for its engine components. The S41940 piston ring set is manufactured to meet OEM specifications for durability and performance. While specific warranty details are not provided, Mahle products typically adhere to industry standards for reliability and material quality.