Description

The Cummins Piston Ring Set R-3802422 (0.50 mm oversize) is a precision-engineered diesel engine ring set designed for engines that have been bored or honed to a 0.50 mm oversize . This ring set is essential during engine rebuilds to restore proper compression, oil control, and combustion efficiency after cylinder machining. Manufactured from premium-grade alloy materials , these oversize piston rings are built to withstand high cylinder pressures, elevated operating temperatures, and continuous heavy-duty service common in Cummins diesel engines. The compression rings provide a strong, consistent seal against the cylinder walls, while the oil control ring effectively manages oil consumption and reduces blow-by. Designed for accurate fitment in 0.50 mm oversize cylinders , the Cummins R-3802422 ring set ensures correct ring tension, proper seating, and stable engine performance. Using the correct oversize ring set is critical to prevent power loss, excessive oil consumption, and premature cylinder wear following machining. This piston ring set is widely used in Cummins diesel engine rebuild and overhaul applications , including on-highway trucks, industrial engines, and heavy-duty equipment requiring precise oversize components.