Description
Technical Overview & Product Details
Exhaust valve stem seals operate in a more demanding environment than their suction counterparts. The 141616-11751 is built to withstand extreme radiant heat from the exhaust valve stem and the high-frequency reciprocating motion of the exhaust cycle. By maintaining a precise oil seal, it ensures that oil does not carbonize on the valve stem or leak into the exhaust manifold, which could otherwise lead to increased exhaust emissions, turbocharger fouling, and potential valve sticking.
The 141616-11751 is manufactured from advanced, heat-stabilized elastomers that provide superior resistance to the thermal degradation often caused by the proximity of the exhaust gases.
- Compatible Engine Type: Yanmar 6N18 (A)L-V series marine propulsion and auxiliary engines.
- Part Number / Designation: 141616-11751.
- Component Type: Valve Stem Seal (Exhaust).
- Material: High-temperature, fluorocarbon elastomer (FKM) with advanced thermal-set properties for exhaust-side applications.
- Application: Mounted at the top of the exhaust valve guide.
Key Features & Performance
- Superior Thermal Resilience: Specially formulated to retain its sealing lip geometry despite continuous exposure to high temperatures, ensuring no loss of function during heavy-duty operation.
- Advanced Oil Metering: Precisely controls the oil film on the valve stem, allowing for necessary lubrication of the valve guide while preventing excess oil migration into the exhaust chamber.
- Structural Durability: Designed with high-strength reinforcement to remain seated securely on the valve guide even under extreme vibration and high-velocity exhaust gas pulses.
- Hardened Surface Resistance: The sealing lip is engineered to resist accelerated wear, ensuring a long and reliable service life between major overhauls.
Why Source from Heybeli Marine?
Failure of an exhaust stem seal is a common culprit for “smoking” engines and increased maintenance requirements for downstream components like the turbocharger. Heybeli Marine safeguards your propulsion system with:
- Strict OEM Interchangeability: Our 141616-11751 seals are manufactured to meet exact Yanmar specifications, ensuring a perfect fit and dependable sealing performance.
- Global Strategic Logistics: We maintain a ready-to-ship inventory of essential maintenance spares, ensuring that your critical repair components are dispatched to any port or shipyard with minimal lead time.
- Quality Assurance: Every batch undergoes rigorous material testing to guarantee resistance to high-temperature oil and combustion byproducts.
- Complete Overhaul Support: We provide these seals alongside our premium Nimonic exhaust valves and valve guides to offer a total, high-reliability solution for your valve train maintenance.
Technical Maintenance Note:
When installing the 141616-11751, ensure that the valve stem is perfectly clean and smooth; any scoring or carbon deposits on the stem will immediately damage the new seal. We highly recommend using a proper seal installation sleeve or guide to prevent the sharp edges of the valve stem from nicking the internal sealing lip during insertion. Always replace these seals during every cylinder head overhaul, regardless of their apparent condition, as the heat exposure will have inevitably reduced the material’s elasticity.