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876431 Head Decarbonizing Gasket Kit for Volvo Penta MD7A MD7B | JLM Marine
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Head Decarbonizing Gasket Kit for Volvo Penta MD7A MD7B Marine Engine – 876431
This Head Decarbonizing Gasket Kit is specifically designed for Volvo Penta MD7A and MD7B marine diesel engines (S/N: 35145 and later). It provides all the essential gaskets needed for head decarbonization and maintenance procedures, ensuring proper sealing and engine performance.
This kit directly replaces Volvo Penta 876431, 875613, and 876430, as well as aftermarket equivalents from Crom Marine (121047, 121046) and Orbitrade (21431, 21430), offering broad cross-compatibility for your service needs.
- Complete gasket kit for head decarbonization procedures
- Fits Volvo Penta MD7A and MD7B marine diesel engines
- Replaces multiple OEM and aftermarket part numbers
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands:
| Brand | Part Number |
|---|---|
| Volvo Penta | 876431 |
| Volvo Penta | 875613 |
| Volvo Penta | 876430 |
| Crom Marine | 121047 |
| Crom Marine | 121046 |
| Orbitrade | 21431 |
| Orbitrade | 21430 |
Compatible Engine Models
Confirm your engine model/year in the table below.
| Brand | Model | Notes |
|---|---|---|
| Volvo Penta | MD7A | S/N: 35145 and later |
| Volvo Penta | MD7B | S/N: 35145 and later |
Technical Specifications
| Specification | Value |
|---|---|
| OEM Number | 876431 |
| Product Type | Head Decarbonizing Gasket Kit |
| Application | Marine Diesel Engine |
| Compatible Engines | Volvo Penta MD7A, MD7B |
Package Contents
This package includes:
- 1 × Head Decarbonizing Gasket Kit (complete set)
Installation Guide
- Ensure the engine is completely cool and disconnect the battery before beginning any work.
- Remove the cylinder head cover and set aside all fasteners in an organized manner.
- Carefully remove the old gaskets from all mating surfaces, ensuring no remnants remain.
- Clean all sealing surfaces thoroughly with appropriate solvent and a non-abrasive scraper. Allow surfaces to dry completely.
- Inspect the cylinder head and block for cracks, warping, or damage before proceeding.
- Position the new gaskets from the kit onto the cleaned surfaces, following the correct orientation.
- Reinstall the cylinder head or components, ensuring proper alignment with dowel pins if present.
- Torque all fasteners to the manufacturer's specifications in the correct sequence (consult your service manual).
- Reinstall the cylinder head cover with the new gasket, tightening fasteners evenly.
- Reconnect the battery and perform a visual inspection for proper gasket seating.
- Start the engine and allow it to reach operating temperature while monitoring for leaks.
- After initial run-in, re-check all fastener torque values as recommended by the manufacturer.
Troubleshooting & FAQ
Q: How do I confirm this gasket kit fits my Volvo Penta engine?
A: Verify that your engine is a MD7A or MD7B model with serial number 35145 or later. Cross-reference your existing part number (876431, 875613, or 876430) with the numbers listed in the Part Number Cross-Reference table above.
Q: What's included in this head decarbonizing gasket kit?
A: This is a complete head decarbonizing gasket kit that includes all necessary gaskets required for head decarbonization procedures on MD7A and MD7B engines. The kit provides all sealing components needed for proper reassembly.
Q: When should I replace the head gaskets on my Volvo Penta MD7?
A: Replace head gaskets during decarbonization services, when performing cylinder head removal for any reason, or if you notice signs of gasket failure such as coolant leaks, oil leaks, overheating, or loss of compression.
Q: Can I reuse the old gaskets if they look intact?
A: No, gaskets should never be reused. Once compressed and torqued, gaskets lose their sealing ability and may cause leaks or engine damage if reinstalled.
Q: Is this an OEM or aftermarket gasket kit?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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