Mahle 51669CP Engine Piston Ring Set

Overview

Mahle piston ring set 51669CP is a standard-size engine ring set built for 4.000-inch bore applications. It is engineered around OE requirements to reduce friction, control oil consumption, and support longer service life in compatible engines.

Compatible with Chevrolet Astro, Chevrolet Blazer, Chevrolet S10, Chevrolet S10 Blazer, GMC Jimmy, GMC Safari, GMC Sonoma, and Oldsmobile Bravada applications listed below, this set uses a shallow-groove design with cast iron top and second rings and a stainless steel oil ring assembly.

Key Features

• Standard 4.000-inch bore diameter for matching engine rebuild specifications
• Shallow-groove design for the listed piston applications
• Cast iron top ring and second ring for durable sealing performance
• Stainless steel oil ring assembly for oil control
• Standard oversize specification for direct rebuild use
• Mahle 51669CP piston ring set for OE-focused engine service

Detailed Description

Mahle 51669CP is an engine piston ring set intended for rebuild work where standard sizing and OE-style ring construction are required. The ring package combines a cast iron top ring, cast iron second ring, and stainless steel oil ring assembly, with axial heights of 0.078 inch for the top and second rings and 0.1575 inch for the oil ring assembly. That combination supports cylinder sealing, oil control, and friction management in the specified applications.

This part cross-references Hastings Piston Rings 4720 for the same application. Mahle 51669CP is listed for 1992-1995 Chevrolet Astro, 1995 Chevrolet Blazer, 1994-1995 Chevrolet S10, 1992-1995 GMC Jimmy, 1995 GMC Safari, 1992-1995 GMC Sonoma, 1992-1994 Chevrolet S10 Blazer, and 1992-1994 Oldsmobile Bravada. Use the fitment details to confirm the correct engine configuration before installation.

What It Helps Address

• Excessive oil consumption from worn ring sealing surfaces
• Loss of compression caused by ring wear or fatigue
• Reduced cylinder sealing during engine rebuilds
• Friction-related wear in standard-bore engine service

Installation Notes

Confirm bore diameter, ring thickness, and groove style before assembly. Clean the piston ring grooves thoroughly and verify end gaps against the engine builder’s specifications. Match the ring set to the exact application listed for the Chevrolet and GMC platforms shown in the fitment data.

Quality Assurance

Mahle piston rings are developed to OE requirements and focus on friction reduction, oil control, and service life. Part number 51669CP reflects Mahle’s engine-component engineering approach for rebuild applications.