Description
Overview:
This Valve Stem Seal is a genuine Yanmar component for the 3TNV76-KWA diesel engine (OEM No. 119717-11350). It controls oil flow at the valve guide by sealing around the valve stem, helping to prevent engine oil entering the combustion chamber. Built for demanding industrial duty, the seal uses an oil‐resistant elastomer bonded to a rigid metal shell with a tension spring to maintain a stable lip load over long service hours. It is engineered for a precise press fit and stem diameter match on Yanmar TNV-series cylinder heads. Suitable for use on engines such as the 3TNV76-KWA and 3TNV70-STB, it supports clean combustion, reliable starting, and consistent performance in compact equipment and standby or prime-power applications.
Key Features:
- Genuine Yanmar part (OEM 119717-11350) for assured compatibility and fit on listed TNV engines
- Oil- and heat-resistant sealing lip with metal outer shell and spring for long service life
- Controls oil migration down the valve guide to reduce oil consumption and blue exhaust smoke
- Helps limit carbon build-up on valves and ports for steadier running and cleaner emissions
- Precision dimensions for correct crush and stem interference without modification
- Stable sealing at operating temperature and speed for consistent performance over time
- Direct like-for-like replacement to restore proper top-end sealing during maintenance
- Supports engine efficiency by minimising oil contamination of the combustion chamber
- Suitable for routine servicing, head work, and full top-end overhauls
- Backed by Yanmar manufacturing standards for reliability in professional and DIY use
Typical Applications:
Used during head refurbishment, decoke, or full top-end rebuilds on Yanmar TNV diesel engines found in mini excavators, compact tractors, site dumpers, generators, light towers, compressors, and water pumps. Also suitable for preventative maintenance where oil seepage past valve guides is suspected or after high operating hours.
Also known as:
Valve guide oil seal, valve oil seal, stem oil seal, valve guide seal. These terms describe the same component fitted at the top of the valve guide to manage lubrication and prevent engine oil from reaching the combustion chamber.
Fits Models:
3TNV70-STB, 3TNV76-KWA, 4TNV84T-KWA, 4TNV84T-MWA, 4TNV84T-XWA
Alternate Part Numbers:
119717-11350, 11971711350
Product Specifications
| L&S Part No. | 119717 11350 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Yanmar |
| OEM No. | 119717-11350 |
| Unit of Sale | 1 |
| Machine Type | Excavators |
| Fits Brands | Yanmar |
| Key Features | - Genuine Yanmar part for 3TNV76-KWA diesel engine - Oil-resistant elastomer with metal shell and tension spring - Controls oil flow to reduce consumption and exhaust smoke - Precision fit for Yanmar TNV-series cylinder heads - Suitable for head refurbishment and top-end overhauls |
| Fits Models | 3TNV76-KWA | 4TNV84T-XWA | 3TNV70-STB | 4TNV84T-KWA | 4TNV84T-MWA |
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