Valve Cover Gasket – Fits Yanmar 6LP Series Marine Diesel Engines (Replaces 119771-00040)
Valve Cover Gasket – Fits Yanmar 6LP Series Marine Diesel Engines (Replaces 119771-00040) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Valve Cover Gasket – Fits Yanmar 6LP Series Marine Diesel Engines (...
Product Details
This is a high-quality aftermarket Valve Cover Gasket – Fits Yanmar 6LP Series Marine Diesel Engines, designed to create a reliable seal for the engine's valve cover. It is specifically compatible with Yanmar 6LP-STE, 6LP-STP, 6LP-STZE, 6LP-STZE1, 6LPA-STE, 6LPA-STP, and 6LPA-STZP series marine diesel engines.
This part is a direct replacement for Yanmar OEM part number 119771-00040.
- Engineered for a precise fit on the valve cover.
- Designed for use in diesel fuel marine environments.
- Features the 12-hole configuration for early 6LP series models.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 119771-00040 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is designed for the following Yanmar marine engines.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Yanmar | 6LP-STE | 4-Stroke | 119771-00040 | Early model with 12-hole configuration |
| Yanmar | 6LP-STP | 4-Stroke | 119771-00040 | Early model with 12-hole configuration |
| Yanmar | 6LP-STZE | 4-Stroke | 119771-00040 | Early model with 12-hole configuration |
| Yanmar | 6LP-STZE1 | 4-Stroke | 119771-00040 | Early model with 12-hole configuration |
| Yanmar | 6LPA-STE | 4-Stroke | 119771-00040 | |
| Yanmar | 6LPA-STP | 4-Stroke | 119771-00040 | |
| Yanmar | 6LPA-STZP | 4-Stroke | 119771-00040 |
Technical Specs
- Product Type
- Valve Cover Gasket
- Installation
- Engine valve cover sealing application
- Fuel Type
- Diesel
- Housing Material
- Gasket material (likely composite or rubber)
- Dimensions
- 20.0" L x 15.0" W x 8.0" H
- Warranty
- 6 months (Yanmar genuine parts)
- Other Technical Attributes
- 12-hole configuration (early 6LP series models)
What’s in the Box
- 1 x Valve Cover Gasket (119771-00040)
Installation Notes
- Disconnect the battery and ensure the engine is cool before beginning work.
- Thoroughly clean the area around the valve cover to prevent debris from entering the engine.
- Carefully remove any components blocking access to the valve cover, then unbolt and remove the cover.
- Remove the old gasket and clean both sealing surfaces on the cylinder head and valve cover meticulously. Ensure they are free of old gasket material, oil, and dirt.
- Place the new gasket into the groove on the valve cover, ensuring it is seated correctly.
- Reinstall the valve cover and tighten the bolts in the sequence and to the torque specifications recommended by the manufacturer's service manual.
- Reconnect the battery, start the engine, and carefully inspect for any oil leaks around the valve cover.
Troubleshooting & FAQ
How do I confirm this gasket fits my Yanmar 6LP engine?
This gasket fits Yanmar 6LP-STE, 6LP-STP, 6LP-STZE, 6LP-STZE1, 6LPA-STE, 6LPA-STP, and 6LPA-STZP models. Crucially, it is the 12-hole version intended for early model series. Please visually compare your existing gasket and count the bolt holes before purchasing.
What is the difference between the 12-hole and 17-hole gaskets?
This listing is for the early model 12-hole gasket (replaces OEM 119771-00040). Some later 6LP series engines may use a 17-hole version (part #00041). It is critical to count the bolt holes on your engine's valve cover to ensure you order the correct part.
What are the signs of a failing valve cover gasket?
Common symptoms include visible oil leaks around the top of the engine, a burning oil smell from oil dripping onto hot exhaust components, unusually low engine oil levels, and a dirty or oil-saturated valve cover area.
Do I need to use sealant when installing this gasket?
Most modern valve cover gaskets are designed to be installed dry. However, always consult your engine's official service manual. It may specify applying a small amount of RTV sealant at sharp corners or where engine components meet (e.g., timing cover joints) to ensure a perfect seal.
When should I replace the valve cover gasket?
There is no fixed replacement interval for a valve cover gasket. It should be replaced whenever it shows signs of leaking or whenever the valve cover is removed for other service, such as a valve lash adjustment.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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