Description
Technical Overview & Product Details
In the high-performance environment of the Yanmar 6N18 engine, the nozzle sleeve serves as the thermal and mechanical interface between the fuel injector and the cylinder head. It is designed to provide a perfect, gas-tight seal while facilitating the critical heat transfer required to prevent the injector tip from overheating—a common cause of nozzle coking, erratic spray patterns, and premature engine failure.
The 146673-11611 is manufactured to exact OEM tolerances, ensuring that the injector tip is positioned at the precise depth and angle required for optimal atomization within the combustion chamber.
- Compatible Engine Type: Yanmar 6N18 (A)L-V series marine propulsion and auxiliary engines.
- Part Number / Designation: 146673-11611.
- Component Type: Nozzle Sleeve (Injector Sleeve).
- Material: Corrosion-resistant, high-strength alloy steel with specialized surface treatment for enhanced thermal conductivity.
- Application: Cylinder head injector housing.
Key Features & Performance
- Precision Geometry: Engineered with strict concentricity and depth tolerances to ensure the fuel injector nozzle sits at the exact manufacturer-specified position, guaranteeing uniform combustion and maximum thermal efficiency.
- Effective Heat Dissipation: Designed to act as an efficient thermal bridge, pulling intense heat away from the injector tip and into the water-cooled cylinder head. This feature is vital for preventing nozzle seizure and carbon buildup during operation on Heavy Fuel Oil (HFO).
- Robust Gas-Tight Sealing: Machined to maintain a perfect, vibration-proof seal against high combustion pressures, preventing gas leakage and potential damage to the injector or the cylinder head bore.
- High-Corrosion Resistance: Specially treated to withstand the aggressive chemical environment caused by exhaust gases and potential coolant exposure, ensuring long-term structural integrity.
Why Source from Heybeli Marine?
A worn or poorly fitted nozzle sleeve can lead to injector overheating, fuel dilution of lube oil, and power loss. Heybeli Marine protects your main and auxiliary engine performance with:
- Strict OEM Interchangeability: Our 146673-11611 sleeves are manufactured to meet or exceed Yanmar’s original specifications, ensuring perfect fitment and function.
- Global Strategic Logistics: We maintain a ready-to-ship inventory of critical 6N18 fuel injection spares, providing rapid delivery to support your vessels at major ports and shipyards globally.
- Quality Assurance: Every sleeve undergoes rigorous dimensional verification and pressure testing before being approved for distribution, ensuring total reliability for your maintenance schedule.
- Complete Overhaul Support: We supply these sleeves alongside the necessary nozzle sleeve gaskets (146673-11870) and O-rings, providing a comprehensive solution for your injector system overhaul.
Technical Maintenance Note:
When installing the 146673-11611 nozzle sleeve, it is critical to ensure the cylinder head bore is pristine and free of all scale, carbon deposits, or old gasket material. We recommend a light application of high-temperature anti-seize or assembly paste to the outer surface to ensure ease of future removal. Always verify the sleeve protrusion height relative to the cylinder head face after installation, as per your Yanmar service manual, to ensure the nozzle tip does not protrude too far into the combustion chamber.