Description
Overview:
The Valve Exhaust for Yanmar 4TNV84T-XWA is a Genuine Yanmar part (OEM No. 129508-11110) designed for the 4TNV84T-XWA and 4TNV84T-KWA industrial diesel engines. Made from durable, heat-resistant alloy steel with a precision-ground head and stem, it seals the exhaust port and controls the release of hot gases from the combustion chamber. A correctly functioning exhaust valve maintains compression, protects the valve seat and cylinder head, and supports smooth running under load. This direct-fit replacement restores factory performance and reliability on engines used in compact construction plant, generators, agricultural and turf machinery. Built for long service life in high-temperature, high-cycle conditions typical of off‐highway use, and specified by Yanmar for assured compatibility and performance.
Key Features:
- Genuine Yanmar part for assured quality and exact fit on listed engines
- OEM/MPN: 129508-11110 for straightforward identification and ordering
- Heat-resistant alloy steel construction for durability in high exhaust temperatures
- Precision-ground sealing face and stem for reliable seating and consistent operation
- Direct replacement design for efficient fitting with standard workshop tools
- Supports correct exhaust flow, efficiency, and engine power output
- Engineered to Yanmar specifications for material hardness and dimensional accuracy
- Reliable performance in demanding duty cycles across plant and power applications
Typical Applications:
Used during cylinder head services, top-end overhauls, and routine rebuilds where exhaust valves are worn, burnt, or pitted. Helps restore compression, power, and fuel efficiency, and can address hard starting, misfiring under load, and excessive exhaust smoke. Suitable for on-site plant, workshop repairs, and preventative maintenance schedules.
Also known as:
Exhaust poppet valve, engine outlet valve, discharge valve, cylinder head exhaust valve, exhaust port valve, valve head and stem for exhaust side.
Fits Models:
4TNV84T-KWA, 4TNV84T-MWA, 4TNV84T-XWA
Alternate Part Numbers:
129508-11110, 12950811110
Product Specifications
| L&S Part No. | 129508 11110 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Yanmar |
| OEM No. | 129508-11110 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Yanmar |
| Key Features | - Genuine Yanmar part ensures exact fit for 4TNV84T engines - Heat-resistant alloy steel for high-temperature durability - Precision-ground head and stem for reliable sealing - Direct replacement design for easy installation - Restores factory performance in demanding conditions |
| Fits Models | 4TNV84T-XWA | 4TNV84T-KWA | 4TNV84T-MWA |
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