Mahle 42240CP Engine Piston Ring Set

Mahle 42240CP Piston Ring Set

Mahle 42240CP is a premium engine piston ring set built for OE-style performance in Toyota and Lexus V8 applications. It combines stainless steel and carbon steel ring materials with low-friction face coating technology to help control oil use and support long service life.

Key Features

• Premium-grade piston ring set for engine rebuild and overhaul work
• 3.7204 in bore diameter with standard oversize specification
• Top ring material: stainless steel
• Second ring material: carbon steel
• Oil ring assembly material: stainless steel
• GNS piston ring face coating for reduced friction
• Shallow groove design
• Fits Toyota Land Cruiser, Toyota Tundra, Toyota Sequoia, Toyota 4Runner, Lexus LX470, and Lexus GX470 applications

Detailed Description

Mahle 42240CP piston rings are engineered around OE requirements, with a focus on lowering friction, reducing ring mass, and helping minimize engine oil consumption. The stainless steel top ring and oil ring assembly, paired with a carbon steel second ring, provide a material combination suited to demanding engine service. This part cross-references Hastings Piston Rings 2C4566 for the same application. For Toyota Land Cruiser, Toyota Tundra, and Lexus GX470 rebuilds, Mahle 42240CP offers the dimensional and material specifications needed for a precise engine refresh.

What This Part Helps Address

• Excessive oil consumption from worn piston rings
• Loss of cylinder sealing during engine wear
• Reduced compression caused by ring fatigue or glazing
• Friction-related wear in high-mileage engine rebuilds
• Restoration of ring sealing performance during overhaul

Installation Notes and Tips

Verify bore diameter, ring groove dimensions, and ring end gap before assembly. Clean piston ring grooves thoroughly and inspect cylinders for taper, scoring, or out-of-round conditions before installing Mahle 42240CP. Confirm the shallow groove configuration and ring thickness specifications match the engine build requirements for your Toyota or Lexus application. Professional engine assembly practices are recommended for proper sealing and service life.

Quality Assurance

Mahle positions this piston ring set as a premium OE-focused component, using advanced ring materials and coating technology to meet modern engine demands. Mahle 42240CP is built for consistent sealing performance and durability in rebuild applications across supported Toyota and Lexus models.