Mahle 42081CP.020 Engine Piston Ring Set

Mahle 42081CP.020 Piston Ring Set

The Mahle 42081CP.020 engine piston ring set is a premium oversize replacement for shallow-groove applications. Built for 3.6614 in bore engines, it combines low-friction ring design with oil-control-focused materials to support consistent sealing and long service life.

Key Features

• Part number 42081CP.020 for 0.020 in oversize applications
• 3.6614 in bore diameter
• Top ring: carbon steel with 0.0469 in axial height
• Second ring: cast iron with 0.0587 in axial height
• Oil ring assembly: GNS material with 0.0984 in axial height
• Plasma-Moly piston ring face coating
• Premium item grade for engine rebuild work
• Shallow groove size configuration

Detailed Description

Mahle designs piston rings around OE requirements, focusing on reduced friction, lower ring mass, controlled oil consumption, and durable sealing performance. The 42081CP.020 uses a carbon steel top ring, cast iron second ring, and GNS oil ring assembly with Plasma-Moly facing to support stable cylinder pressure control in rebuilds that require a 0.020 in oversize ring set. This part cross-references Hastings Piston Rings (e.g., 2C5164.020) for the same application.

Compatible With Ford Transit-150, Ford Transit-250, Ford Transit-350, Ford Transit-350 HD, Ford Explorer, Ford Flex, Ford Taurus, Lincoln MKT, Lincoln Navigator, Lincoln MKS, Lincoln MKZ, Lincoln MKX, Ford Edge, Ford Expedition, Ford F-150, Ford GT, Ford Fusion, Ford Taurus X, and Mercury Sable applications listed for shallow groove use. The 42081CP.020 is also a direct search match for Ford Transit-150 piston ring set, Ford F-150 0.020 oversize piston rings, and Lincoln Navigator engine piston ring replacement.

Common Repair Uses

• Restores cylinder sealing after wear or scoring
• Addresses oil consumption caused by worn ring packs
• Supports compression recovery during engine rebuilds
• Replaces rings during 0.020 in oversize machining work
• Helps correct blow-by and related drivability issues

Installation Notes and Tips

Verify bore size, groove style, and oversize specification before installation. Measure cylinder finish, ring end gap, and piston groove clearance during assembly, and confirm the shallow groove configuration matches the engine build. For best results, install during a full rebuild with proper cleaning and lubrication procedures.

Quality Assurance

Mahle piston rings are engineered to OE-level requirements with an emphasis on friction reduction, oil control, and service life. The 42081CP.020 reflects Mahle’s premium ring design approach for modern Ford and Lincoln engine applications.