Cylinder Head Gasket – Fits Yanmar 4JH3 Series Marine & Industrial Engines (Replaces 129408-01330)
Cylinder Head Gasket – Fits Yanmar 4JH3 Series Marine & Industrial Engines (Replaces 129408-01330) 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
Cylinder Head Gasket – Fits Yanmar 4JH3 Series Marine & Industr...
Product Details
This aftermarket Cylinder Head Gasket is engineered for a precise fit on Yanmar 4JH3 series marine diesel engines and 4TNE/4TNV84 series industrial engines. Built to meet stringent OEM specifications, it ensures a durable, reliable seal between the engine block and cylinder head, effectively preventing combustion gas and coolant leaks.
It serves as a direct replacement for Yanmar part numbers 129408-01330 and 12940801330.
- Installation Method: Direct replacement
- Engine Type: 4-cylinder diesel
- Construction: Heat- and pressure-resistant multi-layer steel/composite
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 129408-01330 |
| Yanmar | 12940801330 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yanmar Marine Engines:
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Yanmar | 4JH3 | 4-Stroke | 129408-01330 | Marine pleasure/main engine |
| Yanmar | 4JH3E | 4-Stroke | 129408-01330 | Marine pleasure/main engine |
| Yanmar | 4JH3CE | 4-Stroke | 129408-01330 | Marine auxiliary engine |
| Yanmar | 4JH3CE1 | 4-Stroke | 129408-01330 | Marine auxiliary engine |
| Yanmar | 4JH3ZA | 4-Stroke | 129408-01330 | Marine pleasure engine |
| Yanmar | 4JH3-TCE | 4-Stroke | 129408-01330 | Marine engine |
| Yanmar | 4JH3-TE | 4-Stroke | 129408-01330 | Marine engine |
For Yanmar Industrial Engines:
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Yanmar | 4TNE84-AF | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNE84-EAF | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNE84-ADCL | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNE84-BAG | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNE84-BME | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNE84-DS | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNE84-EAD | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNE84-EAD1 | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNE84-GB2CT | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNE84T-GH | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNV84-DMW | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNV84-GGE | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNV84-KLAN | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNV84-KVA | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNV84-KWA | 4-Stroke | 129408-01330 | Industrial engine |
| Yanmar | 4TNV84-LU2 | 4-Stroke | 129408-01330 | Industrial engine |
For Equipment Applications:
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Landini | MISTRAL 45, 2-045 | 4-Stroke | 129408-01330 | Tractor |
| Hi-Power | HYW-25 M6 | 4-Stroke | 129408-01330 | Genset Model |
| New Holland | T3020 | 4-Stroke | 129408-01330 | Tractor |
| Mustang | 2040, 2042, 2044, 2050 | 4-Stroke | 129408-01330 | Loader |
| Daewoo Doosan | 1340XL, 602, DSL601 | 4-Stroke | 129408-01330 | Skid Steer Loader |
| Kobelco | SK40SR-2 | 4-Stroke | 129408-01330 | Excavator |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Fuel Type
- Diesel
- Engine Application
- 4-Cylinder
- Housing Material
- Multi-layer steel/composite
- Bore Diameter
- 84mm (3.30 in)
- Product Dimensions
- 44.0cm L x 20.0cm W x 0.5cm H
What’s in the Box
- 1 x Cylinder Head Gasket (Replaces 129408-01330)
Installation Notes
- Disconnect the battery and completely drain the engine coolant.
- Remove obstructing components like the intake/exhaust manifolds, valve cover, and any accessories.
- Following the reverse of the torque sequence, loosen and remove the cylinder head bolts in stages.
- Carefully lift the cylinder head off the engine block. Avoid using pry tools that could damage the mating surfaces.
- Thoroughly clean all old gasket material and residue from both the cylinder head and engine block surfaces.
- Position the new head gasket correctly on the engine block, ensuring proper alignment with dowel pins.
- Lower the cylinder head into place without sliding it, which could damage the new gasket.
- Install new or verified-to-spec head bolts, torquing them in the manufacturer-specified sequence and stages.
- Reassemble all previously removed components.
- Refill the cooling system, reconnect the battery, and start the engine to check for any leaks.
Troubleshooting & FAQ
How do I know if my head gasket is failing?
Common signs include white smoke from the exhaust (coolant burn), engine overheating, bubbling in the radiator or coolant reservoir, milky/foamy engine oil, or unexplained coolant loss. A compression test can help confirm a leak between cylinders or into the cooling system.
Is this gasket compatible with turbocharged 4JH3 models like the 4JH3-TCE?
Yes, this cylinder head gasket is designed to fit both naturally aspirated and turbocharged models within the Yanmar 4JH3 series, including the 4JH3-TCE and 4JH3-TE, as well as the specified industrial engine models.
What is the difference between this and an OEM gasket?
This is an aftermarket part designed to meet or exceed OEM specifications. It uses comparable high-quality, multi-layer steel (MLS) or composite materials to ensure a reliable seal under high heat and pressure, offering a cost-effective solution without compromising performance.
Do I need to use a sealant with this gasket?
Generally, no. Modern multi-layer steel (MLS) and composite head gaskets are designed to be installed dry. Applying sealants can interfere with the gasket's specialized coatings and may cause an improper seal or failure. Always follow the engine service manual for specific instructions.
Is it necessary to replace the head bolts when changing the gasket?
It is highly recommended. Many head bolts are torque-to-yield (TTY), meaning they permanently stretch when tightened and cannot be safely reused. Reusing old bolts can lead to improper clamping force and premature head gasket failure. Always check the service manual for your specific engine.
Will this fit a Yanmar 4TNV88 or other models not listed?
No, this gasket is specifically for the 84mm bore of the 4JH3, 4TNE84, and 4TNV84 series engines. Using it on an engine with a different bore diameter (like the 88mm bore of a 4TNV88) will result in a poor seal, engine damage, and immediate failure.
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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