Cylinder Head Gasket – Fits Yanmar 4JH2 Series Marine Diesel Engines (Replaces 129573-01351)
Cylinder Head Gasket – Fits Yanmar 4JH2 Series Marine Diesel Engines (Replaces 129573-01351) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Cylinder Head Gasket – Fits Yanmar 4JH2 Series Marine Diesel Engine...
Product Details
This high-quality Cylinder Head Gasket – Fits Yanmar 4JH2 Series Marine Diesel Engines (Replaces 129573-01351) is designed for reliable performance in demanding marine environments. It ensures a proper seal between the cylinder head and the engine block, compatible with a range of 4-cylinder Yanmar 4JH2 models manufactured between 1985–1995, including the 4JH2E, 4JH2TE, 4JH2HTE, 4JH2DTE, and 4JH2UTE variants.
This part serves as a direct replacement for Yanmar OEM part number 129573-01351.
- Engineered as a direct replacement for hassle-free installation.
- Constructed from a durable composite/non-asbestos material for longevity.
- Designed for use with diesel fuel systems.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 129573-01351 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is compatible with the following Yanmar marine diesel engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yanmar | 4JH2E | 80 | 4-Stroke | 129573-01351 | |
| Yanmar | 4JH2TE | 88 | 4-Stroke | 129573-01351 | Turbocharged model |
| Yanmar | 4JH2HTE | 100 | 4-Stroke | 129573-01351 | High output turbocharged model |
| Yanmar | 4JH2DTE | 100 | 4-Stroke | 129573-01351 | Direct injection turbocharged model |
| Yanmar | 4JH2UTE | 100 | 4-Stroke | 129573-01351 | |
| Yanmar | 4JH2UTE-B | 4-Stroke | 129573-01351 | ||
| Yanmar | 4TN82 | 4-Stroke | 129573-01351 | Industrial engine application | |
| Yanmar | 4TNA82 | 4-Stroke | 129573-01351 | Industrial engine application | |
| Yanmar | 4TN8282L | 4-Stroke | 129573-01351 | Industrial engine application |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Installation
- Direct replacement
- Fuel Type
- Diesel
- Housing Material
- Composite/Non-asbestos
- Dimensions
- 40.0" L x 16.0" W x 0.1" H
- Fitting Type
- Direct fit
- Other Technical Attributes
- Non-asbestos construction
What’s in the Box
- 1 x Cylinder Head Gasket (Replaces 129573-01351)
Installation Notes
- Ensure the engine is completely cool before beginning work. Disconnect the battery and relieve any pressure in the cooling system.
- Drain the engine coolant and disconnect all hoses, sensors, and electrical connectors attached to the cylinder head.
- Remove the valve cover, intake and exhaust manifolds, and any other components obstructing access to the head bolts.
- Loosen the cylinder head bolts in the reverse order of the manufacturer's specified torque sequence, typically starting from the outside and working inwards.
- Carefully lift the cylinder head off the engine block. Avoid using pry tools that could damage the mating surfaces.
- Thoroughly clean both the engine block deck and the cylinder head mating surfaces. Remove all old gasket material, sealant, and carbon deposits.
- Ensure the surfaces are perfectly flat, clean, and dry before placing the new gasket. Do not use any sealant unless specified by the engine manufacturer.
- Position the new cylinder head gasket correctly over the dowel pins on the engine block.
- Carefully lower the cylinder head back onto the block, ensuring it is properly aligned.
- Install and torque the head bolts in the correct sequence and stages as specified in your engine's service manual. This is critical to ensure a proper seal.
- Reassemble all remaining components in the reverse order of removal.
- Refill the cooling system, reconnect the battery, and start the engine to check for any leaks.
Troubleshooting & FAQ
How do I know if my cylinder head gasket is failing?
Common signs of a blown head gasket include engine overheating, white smoke from the exhaust (coolant burning), milky or frothy engine oil (oil mixed with coolant), loss of coolant without visible leaks, and poor engine performance or misfires.
Is this gasket compatible with the turbocharged 4JH2TE model?
Yes, this gasket is fully compatible with the Yanmar 4JH2TE as well as other variants like the 4JH2HTE and 4JH2DTE. Please verify your specific model in the compatibility table.
Do I need to apply any sealant to this gasket during installation?
No, this gasket is designed to be installed dry. Applying sealants can interfere with its ability to seal properly and may cause premature failure. Always ensure the mating surfaces on the engine block and cylinder head are perfectly clean and flat.
What is the recommended replacement interval for a head gasket?
A cylinder head gasket is not a routine maintenance item. It is typically replaced only when it fails or during a major engine overhaul. Its lifespan depends on operating conditions, maintenance, and proper installation.
My engine model is 4JH2UTE. Is this the correct part?
Yes, this head gasket fits the Yanmar 4JH2UTE and 4JH2UTE-B models. Always double-check your OEM part number (129573-01351) to ensure an exact match.
Can I reuse my old cylinder head bolts?
It is strongly recommended to use new cylinder head bolts. Many are torque-to-yield (TTY) bolts designed to be stretched during the initial installation and should not be reused, as they may not provide the correct clamping force a second time.
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.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
