Description

The Cummins Piston Ring Set R-3802262 (1.00 mm oversize) is an OEM-spec piston ring solution designed for 1.00 mm overbored cylinders in 6CT 8.3 diesel engines . This ring set directly replaces OE part number 3802263 , restoring correct compression sealing, oil control, and combustion efficiency in Cummins engines . Oversize piston rings are required after cylinder boring during engine rebuilds to compensate for material removed from the cylinder walls. The 1.00 mm oversize configuration ensures proper ring tension, consistent oil film control, and stable piston-to-cylinder sealing under high combustion pressures. Manufactured from high-strength, wear-resistant materials, the R-3802262 ring set is engineered to withstand continuous-duty operation, elevated temperatures, and heavy diesel loads. Precision-machined ring profiles promote fast seating, reduced blow-by, and controlled oil consumption—critical for long engine life and reliable performance. This piston ring set is commonly installed during 6CT 8.3 engine rebuilds, in-frame overhauls, piston replacements, and professional remanufacturing projects . When paired with 1.00 mm oversize pistons and properly machined liners, it helps restore factory performance and durability. Cross-Reference & Fitment Aftermarket Reference: R-3802262 OEM Reference: 3802263 Size: 1.00 mm Oversize Engine Platform: Cummins 6CT 8.3 Application: Oversize piston ring set for bored cylinders