Volvo Penta Decarbonizing Gasket Kit – Fits Volvo Penta D4 Diesel Engines
Volvo Penta Decarbonizing Gasket Kit – Fits Volvo Penta D4 Diesel Engines is backordered and will ship as soon as it is back in stock.
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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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Volvo Penta Decarbonizing Gasket Kit – Fits Volvo Penta D4 Diesel E...
Product Details
This is a complete Volvo Penta Decarbonizing Gasket Kit designed for the Volvo Penta D4 series of 4-stroke diesel engines, covering models from 2006 to the present day. The kit provides the necessary gaskets and seals for performing a cylinder head overhaul or decarbonizing service to restore engine performance and efficiency.
It serves as a direct aftermarket replacement for Volvo Penta part numbers 21371112 and its predecessor, 3588432.
- Enables comprehensive engine head service and decarbonizing maintenance.
- Specifically designed for marine diesel fuel applications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 3588432 | Superseded by 21371112 |
| Volvo Penta | 21371112 | Current OEM part number |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure correct fitment.
Volvo Penta Engines: This kit is engineered for D4 models rated between 180 and 300 HP manufactured from 2006 onwards.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Volvo Penta | D4 | 180-300 | 4-Stroke | 2006–Present | 21371112/3588432 |
Technical Specs
- Product Type
- Decarbonizing Gasket Kit
- Application
- Engine head service
- Fuel Type
- Diesel
- Package Dimensions
- 64.0" L x 23.0" W x 2.0" H
- Primary Function
- For cylinder head overhaul/decarbonizing maintenance
What’s in the Box
- 1 x Decarbonizing Gasket Kit (Replaces 21371112)
Installation Notes
The following is a generic guide. Always consult your engine’s official service manual for detailed procedures and torque specifications.
- Disconnect the battery and drain the engine coolant and oil.
- Remove the exhaust and intake manifolds, fuel lines, and any other components obstructing access to the cylinder head.
- Carefully loosen the cylinder head bolts in the sequence specified by the manufacturer to prevent warping.
- Remove the cylinder head and old gasket. Thoroughly clean all mating surfaces on both the head and the engine block.
- Position the new head gasket correctly, ensuring all holes align.
- Reinstall the cylinder head and torque the bolts in the specified pattern and stages.
- Reassemble all previously removed components using the new gaskets and seals from the kit as required.
- Refill engine coolant and oil to the proper levels.
- Start the engine and carefully check for any fuel, oil, or coolant leaks.
Troubleshooting & FAQ
How can I confirm this kit fits my specific D4 engine?
This kit is designed for the Volvo Penta D4 series from 2006 to present. While this covers most models, the best way to guarantee fitment is to cross-reference the OEM part number (21371112 or 3588432) with your engine's service manual or parts diagram. If in doubt, consult a professional marine mechanic.
What are the signs that a decarbonizing service is needed?
Common symptoms include a noticeable loss of engine power, increased black smoke from the exhaust, rough idling, higher-than-normal fuel consumption, or engine overheating. These can indicate carbon buildup or a failing head gasket.
Does this kit include every seal needed for a cylinder head replacement?
This decarbonizing kit includes the essential gaskets required for a cylinder head service, such as the head gasket and manifold gaskets. However, depending on the specific job, you may need additional seals (e.g., valve stem seals) that might not be included. Always compare the kit contents with the job requirements listed in your service manual.
When should the head gasket be replaced on a Volvo Penta D4?
There is no fixed replacement interval for a head gasket. It should be replaced if it fails, which can be indicated by overheating, or coolant/oil mixing. It is also replaced whenever the cylinder head is removed for other service, such as decarbonizing or valve work.
Is this an original Volvo Penta OEM part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. It has been manufactured in an ISO 9002 certified facility and is batch-inspected for quality and consistency.
How fast is shipping?
We ship worldwide, with typical transit times of 5–15 days for standard delivery. Expedited shipping options may be available at checkout depending on your location. Standard shipping is free for most orders.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter any issues, please contact our support team with your order details. Returns are accepted for unused items in their original condition within our standard return window. Please see our policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchasing. If anything differs—even if your model is listed as compatible—do not order.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is highly recommended for safety, performance, and to prevent engine damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to meet or exceed OEM-level tolerances and rigorously test them for real-world reliability.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with an average transit time of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on high-quality materials or quality control.
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