Mahle S42097 Engine Piston Ring Set

Mahle S42097 Piston Ring Set for Ford Super Duty

Mahle S42097 is a premium engine piston ring set built for precise cylinder sealing, controlled oil consumption, and reduced friction. It is a direct-fit option for 2008-2010 Ford F-250 Super Duty and 2008-2010 Ford F-350 Super Duty applications with a 3.866 in bore diameter.

Key Features

• Part number S42097 for engine rebuild and service work
• 3.866 in bore diameter with standard oversize specification
• Top ring material: carbon steel with 0.1406 in axial height
• Second ring material: cast iron with 0.0783 in axial height
• Oil ring assembly: 2 pc. design, cast iron, 0.1177 in axial height
• Plasma-Moly ring face coating for improved wear resistance
• Premium item grade for rebuild-quality engine service
• Compatible With 2008-2010 Ford F-250 Super Duty and 2008-2010 Ford F-350 Super Duty

Detailed Description

Mahle S42097 piston rings are engineered to meet OE-level requirements for sealing, friction control, and oil management in Ford Super Duty diesel engine applications. The ring package uses a carbon steel top ring, cast iron second ring, and a cast iron oil ring assembly with a plasma-moly face coating to support consistent cylinder wall contact and long service life. This part cross-references 1873172C91 for the same application. If you are servicing a 2008-2010 Ford F-250 Super Duty or 2008-2010 Ford F-350 Super Duty, S42097 provides the correct standard bore ring set specification for rebuild work.

Common Problems This Part Helps Address

• Excessive oil consumption from worn piston rings
• Loss of cylinder compression during engine rebuilds
• Blow-by caused by ring wear or poor sealing
• Increased friction from aged or damaged ring surfaces
• Reduced engine efficiency due to worn ring components

Installation Notes and Tips

Verify bore diameter, ring end gap, and groove dimensions before installation. Clean piston ring grooves thoroughly and inspect cylinder walls for wear, scoring, or taper before assembly. Follow the engine builder’s service specifications for ring orientation, gap placement, and break-in procedure. For Ford F-250 Super Duty and Ford F-350 Super Duty rebuilds, confirm the engine code and piston specification match the S42097 ring set before final assembly.

Quality Assurance

Mahle manufactures piston rings to OE-driven standards with an emphasis on reduced friction, controlled oil use, and durable service life. S42097 reflects Mahle’s premium engine component engineering for Ford Super Duty applications.