Mahle S41940.020 Engine Piston Ring Set

Engine Piston Ring Set for Ford Super Duty and Excursion Models

The Mahle S41940.020 engine piston ring set is designed for precise fitment and reliable performance in select Ford vehicles. Engineered to meet the demands of Ford E-350 Club Wagon, E-350 Super Duty, Excursion, F-250 Super Duty, and F-350 Super Duty models, this piston ring set supports optimal engine compression and oil control.

Key Features of Mahle S41940.020 Piston Ring Set

• Bore diameter of 3.7598 inches for accurate cylinder fit
• Premium item grade ensuring durability and consistent performance
• 2-piece cast iron oil ring assembly with 0.1353 inch axial height thickness
• Plasma-moly coating on piston ring face for enhanced wear resistance
• Oversize piston rings at 0.020 inch for engine rebuilds and repairs
• Cast iron second ring with 0.0779 inch thickness for effective sealing
• Carbon steel top ring with 0.0901 inch thickness for high strength and durability

Detailed Description of the Mahle Engine Piston Ring Set

This Mahle engine piston ring set, part number S41940.020, is manufactured to meet stringent quality standards for Ford heavy-duty trucks and vans. The set includes a 2-piece oil ring assembly made from cast iron, designed to maintain proper oil control and reduce consumption. The plasma-moly coating on the piston ring face improves wear resistance and helps maintain a tight seal under high temperature and pressure conditions. Oversized by 0.020 inches, these rings accommodate cylinder bore reconditioning, ensuring a precise fit and restoring engine compression. The combination of cast iron and carbon steel materials in the second and top rings provides a balance of durability and sealing efficiency, critical for maintaining engine performance in Ford E-350 Club Wagon, E-350 Super Duty, Excursion, F-250 Super Duty, and F-350 Super Duty models.

Applications and Common Engine Issues Addressed

• Restores compression loss due to worn or damaged piston rings
• Reduces excessive oil consumption and smoking
• Improves engine efficiency and power output
• Addresses blow-by gases and prevents contamination of engine oil
• Supports engine rebuilds requiring oversize piston rings

Installation Notes and Tips

Ensure the cylinder bore is properly honed and cleaned before installation to achieve optimal ring seating. Verify the bore diameter matches the 3.7598 inch specification and confirm the oversize ring dimension of 0.020 inch is compatible with your engine rebuild requirements. Follow manufacturer torque specifications and ring end gap clearances during installation to prevent premature wear or engine damage.

Quality Assurance and Warranty Information

Mahle piston rings are manufactured under strict quality control processes to meet OEM standards. This premium grade piston ring set is designed for durability and consistent performance in heavy-duty Ford engines. Warranty coverage details should be confirmed with the original equipment manufacturer or authorized distributor.