Cummins QSK23 Engine Overhaul Kit (6-Cylinder In-Frame Set)

Full major overhaul kit containing all six matched cylinder and piston components for the 23-liter Cummins QSK23 engine – also compatible with Komatsu 6D170.

In heavy-duty applications such as mining, power generation, construction, and marine equipment, the Cummins QSK23 engine needs a complete set of matched internal components for a major in-frame overhaul. This QSK23 Engine Overhaul Kit supplies everything required to restore compression, control oil consumption, and return the engine to maximum performance after extended operation.

The kit includes precision-matched cylinder liners, pistons, piston pins, piston rings, retainers, and all liner sealing rings engineered to Cummins specifications. All components are designed to work together for a perfect fit, optimal heat transfer, and long-term durability under extreme loads and thermal cycles. Installation is direct with no machining required on standard applications.

Product Features

• Complete 6-cylinder matched set for full in-frame major overhaul
• Precision-honed liners with matched pistons for excellent sealing
• High-strength piston pins and retainers for reliable operation
• Multi-piece piston ring set for superior oil control and compression
• All required liner sealing rings included
• Direct-fit design – no machining required for standard applications
• Also compatible with Komatsu 6D170 engines

Kit Contents (for 6 Cylinders)

Note: Piston part numbers may vary slightly by engine configuration. Professional installation recommended.

Compatible Applications

Ideal for Cummins QSK23 series engines (and Komatsu 6D170 equivalents) in:

• Mining and construction machinery
• Industrial generators and power plants
• Heavy-duty trucks and excavators
• Marine propulsion and stationary equipment

FAQ

• What is included in the QSK23 engine overhaul kit? 6 cylinder liners, 6 pistons, 6 piston pins, 12 retaining rings, full piston ring sets, and all liner sealing rings.
• Does it fit Komatsu 6D170? Yes – this kit is directly compatible with Komatsu 6D170 engines.
• Is this a major in-frame overhaul kit? Yes – designed for complete in-frame major repair without removing the engine block.
• Are the parts matched for a perfect fit? All components are precision-matched for Cummins QSK23 specifications.

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