Bonnet Gasket – Fits Yanmar 2TNV70 Series (Replaces 119415-11310)
Bonnet Gasket – Fits Yanmar 2TNV70 Series (Replaces 119415-11310) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Bonnet Gasket – Fits Yanmar 2TNV70 Series (Replaces 119415-11310)
Product Details
This Bonnet Gasket provides a precision seal for Yanmar 2TNV70 series diesel engines, including models 2TNV70-APK, 2TNV70-ASG, and 2TNV70-HGB2BT. It is also compatible with the Yanmar 2YM15 model, where it functions as a rocker cover gasket.
It serves as a direct, reliable aftermarket replacement for Yanmar OEM part number 119415-11310.
- Easy Installation: Designed for direct replacement without modification.
- Application: Used for the cylinder head & bonnet assembly on 2TNV70 engines and as a rocker cover gasket on 2YM15 engines.
- Fuel Compatibility: Specifically for use in diesel engine applications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 119415-11310 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Yanmar | 2TNV70-APK | 119415-11310 | Cylinder head & bonnet application |
| Yanmar | 2TNV70-ASG | 119415-11310 | Cylinder head & bonnet application |
| Yanmar | 2TNV70-HGB2BT | 119415-11310 | Cylinder head & bonnet application |
| Yanmar | 2YM15 | 119415-11310 | Rocker cover gasket application |
Technical Specs
- Product Type
- Bonnet Gasket
- Installation
- Direct replacement
- Fuel Type
- Diesel
- Other Technical Attributes
- Used in cylinder head & bonnet assembly
- Product Dimensions
- 15.0" L x 13.0" W x 0.3" H
- Warranty
- Manufacturer defect warranty (when purchased from authorized dealer)
What’s in the Box
- 1 x Gasket, Bonnet (Replaces 119415-11310)
Installation Notes
- Ensure the engine is off and completely cool before beginning work. Disconnect the negative battery terminal for safety.
- Thoroughly clean the engine block and bonnet mating surfaces. Remove all traces of old gasket material, oil, and debris.
- Carefully position the new bonnet gasket, ensuring all bolt holes and fluid passages align perfectly.
- Reinstall the bonnet cover. Tighten the bolts in the sequence and to the torque values specified in your engine's service manual.
- After reassembly, reconnect the battery, start the engine, and carefully inspect for any oil leaks around the bonnet area.
Troubleshooting & FAQ
How do I confirm this gasket fits my Yanmar engine?
This gasket fits Yanmar 2TNV70 series models (2TNV70-APK, 2TNV70-ASG, 2TNV70-HGB2BT) and the 2YM15 model. The most reliable way to confirm fitment is to match your old part's number to the replacement number, 119415-11310. Always visually compare your old part to our photos.
Is this a bonnet gasket or a rocker cover gasket?
It serves both purposes depending on the engine. For the Yanmar 2TNV70 series, it is used as a bonnet gasket. For the Yanmar 2YM15, it functions as a rocker cover gasket.
Do I need to use sealant with this gasket?
In most cases, this gasket is designed for a dry installation. Applying sealants can sometimes interfere with proper sealing. However, always defer to the specific instructions in your engine's official service manual.
What are the signs of a failing bonnet gasket?
The most common symptom is a visible oil leak around the seam between the cylinder head and the bonnet or rocker cover. A dirty, oil-caked engine in this area is a strong indicator that the gasket needs replacement.
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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