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Piston Kit (1.00mm Oversize) Cummins 4089736 | 3970124, 4089615, 111758
Restore optimal engine compression and performance with this premium 1.00mm oversize Cummins 4089736 piston kit, engineered for ISB and QSB series engines.
Description
High-Performance Cummins 4089736 Piston Kit (+1.00mm Oversize)
Ensure your heavy-duty diesel engine operates at peak efficiency with the premium Cummins 4089736 piston kit. Specifically engineered for Cummins ISB and QSB series engines (including ISB 4.5, QSB 4.5, ISB 5.9, and QSB 5.9), this 1.00mm (+0.040″) oversize piston kit is designed to restore optimal cylinder compression, reduce oil consumption, and withstand the extreme thermal and mechanical stresses of demanding industrial and commercial applications.
This part is also available under the numbers: 3970124, 4089615, 111758.
Constructed from high-strength, wear-resistant alloys, the Cummins 4089736 piston kit provides a perfect fit and reliable performance during engine rebuilds. It features a 102mm bore diameter and a 54mm compression height, ensuring precise combustion chamber geometry. The complete kit includes the piston body, a high-durability piston ring set, the wrist pin, and retaining clips, providing everything needed for a seamless installation.
Key Features & Benefits
- Precision Engineered: Designed to meet exact dimensional tolerances for Cummins ISB 4.5, QSB 4.5, ISB 5.9, and QSB 5.9 engines.
- 1.00mm Oversize (+0.040″): Ideal for engine blocks that have been bored out to repair cylinder wall wear or damage.
- Complete Rebuild Kit: Includes the piston body (3970124), premium piston rings (4089615), wrist pin, and retaining clips.
- Superior Durability: Manufactured from advanced thermal-resistant alloys to prevent cracking and ensure long-lasting service life under heavy loads.
Product Specifications
- Brand: Cummins
- Part Number (SKU): 4089736
- Piston Diameter (Bore): 102 mm
- Compression Height: 54 mm
- Oversize: +1.00 mm (+0.040 in)
- Compatible Engine Models: Cummins ISB 4.5, QSB 4.5, ISB 5.9, QSB 5.9, ISD 4.5
Cross-Reference / Interchange Part Numbers
This part replaces / is interchangeable with the following part numbers:
- 4089736
- 3970124
- 4089615
- 111758
