Description
Seal the Power: High-Performance 4095440 QSK23 Head Gasket
Product Specifications
| Specification | Details |
| Product Name | Cylinder Head Gasket / Head Seal |
| OEM Part Number | 4095440 |
| Engine Compatibility | Cummins QSK23 (Industrial / Mining / Marine) |
| Brand | VPGASKET |
| Core Materials | Multi-Layer Steel (MLS) / Reinforced Steel Fire Rings |
| Application | Heavy-Duty Excavators (e.g., PC2000), Generators, Mining Trucks |
| Condition | 100% Brand New Premium Aftermarket Replacement |
Industrial Strength for 23-Liter Powerhouses
The Cummins QSK23 is a monumental engine designed to operate under continuous full-load conditions in the world’s most demanding environments. With its 23-litre displacement and high-torque output, the cylinder head interface is subjected to immense mechanical stress and extreme combustion heat. The 4095440 cylinder head gasket is engineered as a definitive barrier against performance loss. Featuring high-tensile steel construction, it ensures a micro-precise seal between the engine block and the cylinder head, preventing the dangerous cross-contamination of oil, coolant, and combustion gases.
Advanced Multi-Layer Steel (MLS) Technology
Modern industrial engines like the QSK23 require sealing solutions that go beyond traditional composite materials. The 4095440 gasket from VPGASKET incorporates Multi-Layer Steel (MLS) technology, which provides:
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Superior Recovery Rates: The multiple layers act as a spring, maintaining constant clamping force even during the thermal expansion and “head lift” common in high-horsepower applications.
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Reinforced Fire Rings: Precision-engineered combustion seals prevent blow-by and protect the cylinder head from the intense heat of the firing chamber.
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Specialised Surface Coatings: An advanced elastomer coating helps seal minor surface micro-imperfections on the block and head, ensuring a leak-proof finish.
Engineered for Maximum Uptime in Mining and Power Gen
In sectors like mining and large-scale power generation, every hour of unplanned downtime costs thousands of dollars. A failed head gasket can lead to hydraulic lock, overheating, or permanent engine block damage. The 4095440 overhaul gasket is manufactured to match the gruelling service intervals of original equipment. By choosing VPGASKET, you are investing in a component that resists chemical degradation from modern long-life coolants and high-performance synthetic oils, keeping your QSK23-powered fleet operational and profitable.
Professional Installation Protocols for QSK23
To guarantee the longest service life for your 4095440 head gasket, professional heavy-duty mechanics should adhere to these industry standards:
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Surface Precision: Meticulously clean and inspect both the cylinder head and the engine block deck. Check for flatness using a precision straight-edge; any warpage beyond factory tolerance will compromise the MLS seal.
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Dry Installation: This gasket is designed for dry assembly. Do not apply RTV silicone, copper spray, or other sealants unless explicitly mandated by the Cummins QSK23 technical manual, as these can interfere with the engineered sealing beads.
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New Fasteners: The QSK23 uses high-torque fasteners. It is highly recommended to replace the cylinder head bolts with new ones to ensure uniform clamping pressure and prevent bolt-stretch-related leaks.
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Torque Sequence Compliance: Strictly follow the factory-specified, multi-stage tightening sequence and final angle-torque values. Even pressure across the 23-litre head casting is vital to prevent cracking and ensure a permanent seal.





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