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Piston Ring Set (1.00mm Oversize) Cummins 4089615 | 3938199, 505152, MXF-C4089615
Restore optimal engine compression and oil control with this premium 1.00mm oversize piston ring set for Cummins B-Series and QSB engines. Engineered to meet precise specifications, it ensures a reliable seal and long-lasting durability.
Description
Premium Piston Ring Set (1.00mm Oversize) for Cummins Engines
The Cummins 4089615 piston ring set is a high-quality, precision-engineered component designed to restore optimal cylinder compression, minimize blow-by, and maintain efficient oil control in your diesel engine. This specific set is designed for a 1.00mm (.040″) oversize bore, making it the perfect choice for engine rebuilds where the cylinders have been bored out to correct wear and restore a perfect cylinder wall profile.
This part is also available under the numbers: 3938199, 505152, MXF-C4089615.
Engineered for Heavy-Duty Performance
Manufactured to meet rigorous standards, this piston ring set features a robust three-ring configuration for a single cylinder. The top compression ring is constructed from high-strength steel with a chrome face to withstand extreme combustion pressures and temperatures. The second compression ring provides secondary sealing and scraping, while the advanced oil control ring ensures optimal lubrication of the cylinder wall without allowing excess oil into the combustion chamber.
Key Features & Benefits
- 1.00mm (.040″) Oversize: Specifically designed for oversized cylinders to ensure a perfect fit and seal after boring.
- Complete Single-Cylinder Set: Includes the top compression ring, second compression ring, and oil control ring.
- Durable Construction: High-grade materials, including a chrome-faced top ring, offer exceptional wear resistance and thermal stability.
- Restores Efficiency: Prevents oil consumption, reduces exhaust emissions, and restores lost engine power and compression.
Compatible Engine Models
This piston ring set is compatible with a wide range of Cummins B-Series and QSB engines, commonly found in automotive, industrial, agricultural, and marine applications. Compatible models include:
- Cummins 4B 3.9L & 4BT / 4BTA
- Cummins 6B 5.9L & 6BT / 6BTA (including Dodge Ram 2500/3500 applications from 1989-2007)
- Cummins QSB 3.9, QSB 4.5, QSB 5.9, and QSB 6.7
- Cummins ISB Series
Cross-Reference / Interchange Part Numbers
This part replaces / is interchangeable with the following part numbers:
- 4089615
- 3938199
- 505152
- MXF-C4089615
- M-4089615
- M-3938199
