Mahle 41940.030 Engine Piston Ring Set

Mahle 41940.030 Engine Piston Ring Set

Mahle 41940.030 is a premium engine piston ring set built for 3.7702 in bore applications with a 0.030 in oversize. It combines low-friction ring design with materials selected to help control oil consumption and support long service life in demanding Ford truck and van engines.

Key Features

• Part number 41940.030 for precise ordering and service matching
• 3.7702 in bore diameter with 0.030 in oversize
• Top ring material: carbon steel with plasma-moly face coating
• Second ring material: cast iron
• Oil ring assembly material: cast iron
• Premium item grade for engine rebuild and overhaul work
• Engine piston ring set for Ford E-350 Super Duty, F-250 Super Duty, F-350 Super Duty, E-350 Club Wagon, and Excursion applications

Detailed Description

Mahle 41940.030 piston rings are engineered around OE-style requirements for friction control, ring mass reduction, and oil management. The carbon steel top ring with plasma-moly coating is selected for wear resistance and stable sealing, while the cast iron second ring and oil ring assembly support consistent cylinder wall contact and oil control. This combination is suited to rebuilds where ring seal, compression retention, and oil consumption control are priorities. This part cross-references 1843267C91 for the same application.

Fits 2004-2010 Ford E-350 Super Duty, N/A. Fits 2003-2007 Ford F-250 Super Duty, N/A. Fits 2003-2007 Ford F-350 Super Duty, N/A. Fits 2004-2005 Ford E-350 Club Wagon, N/A. Fits 2003-2005 Ford Excursion, N/A.

What It Helps Address

• Excessive oil consumption from worn or tired piston rings
• Loss of compression caused by ring wear or poor cylinder sealing
• Blow-by concerns during engine rebuild or overhaul
• Reduced ring performance in high-load Ford truck and van engines
• Need for an oversize ring set during machine work

Installation Notes and Tips

Verify bore size before installation and confirm the 0.030 in oversize matches the finished cylinder dimensions. Check ring end gaps, ring groove clearance, and cylinder wall condition during assembly. For best results, follow the engine builder’s specifications for ring orientation, gap placement, and break-in procedure. Fits 2004-2010 Ford E-350 Super Duty, N/A; 2003-2007 Ford F-250 Super Duty, N/A; 2003-2007 Ford F-350 Super Duty, N/A; 2004-2005 Ford E-350 Club Wagon, N/A; and 2003-2005 Ford Excursion, N/A.

Quality Assurance

Mahle is known for piston ring technology developed around OE requirements, with an emphasis on reduced friction, controlled oil use, and durable service life. Part number 41940.030 is a premium-grade engine piston ring set intended for accurate rebuild service in the listed Ford applications.