Mahle 42190CP Engine Piston Ring Set

Mahle 42190CP Engine Piston Ring Set

Mahle 42190CP is a premium engine piston ring set built to OE-level dimensional and material requirements. It is specified for shallow groove applications with a 3.7008 in bore diameter and is engineered to support controlled oil use, reduced friction, and consistent sealing performance.

Key Features

• Part number 42190CP from Mahle
• Standard oversize with 3.7008 in bore diameter
• Premium item grade for engine rebuild applications
• Top ring material: stainless steel
• Second ring material: cast iron
• Oil ring assembly material: GNS
• Top ring thickness: 0.0390 in
• Second ring thickness: 0.0469 in
• Oil ring assembly thickness: 0.0591 in
• Shallow groove design
• Piston ring face coating: GNS

Product Details

Mahle piston rings are developed around OE requirements, with attention to friction reduction, ring mass control, oil consumption management, and service life. This 42190CP piston ring set uses a stainless steel top ring, cast iron second ring, and GNS-treated oil ring assembly to support stable cylinder sealing in modern GM applications. It is a direct-fit choice for vehicles such as the 2012-2016 Cadillac SRX, 2013-2016 Cadillac XTS, and 2012-2016 Chevrolet Impala when the engine specification matches the listed bore and shallow groove configuration. This part number 42190CP is also listed for other applications including Chevrolet Camaro, Chevrolet Colorado, Chevrolet Equinox, GMC Canyon, and GMC Terrain.

Common Uses

• Restoring compression loss caused by worn piston rings
• Addressing excessive oil consumption from ring wear or glazing
• Correcting blow-by that affects idle quality and crankcase pressure
• Supporting engine rebuilds that require standard-size ring dimensions
• Replacing worn rings in shallow groove piston applications

Installation Notes

Verify bore diameter, ring groove style, and axial heights before installation. Measure cylinder wear, check ring end gap, and confirm piston-to-ring compatibility during engine assembly. Clean ring lands thoroughly and follow the engine builder’s installation and break-in procedures for the best sealing results. Fitment examples include 2012-2016 Cadillac SRX, 2013-2016 Cadillac XTS, and 2012-2016 Chevrolet Impala.

Quality Assurance

Mahle manufactures this piston ring set to premium specifications with OE-focused engineering and materials selected for durability and reduced oil consumption. Part number 42190CP is built for the listed applications and engine dimensions, including 2012-2016 Cadillac SRX and 2012-2016 Chevrolet Impala fitments.