Big-End Bearing Kit – Fits Volvo Penta D41B, AD31B, TMD31B Series (Replaces 876511)
Big-End Bearing Kit – Fits Volvo Penta D41B, AD31B, TMD31B Series (Replaces 876511) 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
Product Details
This aftermarket Big-End Bearing Kit is designed for a range of Volvo Penta diesel engines, including the D41B, AD31B, and TMD31B series. It serves as a crucial internal engine component for 4-stroke diesel models, specifically for serial numbers SN2204141573 and later.
It is a direct replacement for Volvo Penta part number 876511.
- Installation: Engine Internal Component
- Engine Type: Fits 4-stroke diesel engines
- Serial Number Fitment: Applicable for SN2204141573 and later
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 876511 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| Volvo Penta | AD31B | 4-Stroke | 876511 |
| Volvo Penta | D41B | 4-Stroke | 876511 |
| Volvo Penta | MD31A | 4-Stroke | 876511 |
| Volvo Penta | TMD31B | 4-Stroke | 876511 |
| Volvo Penta | AD31D | 4-Stroke | 876511 |
| Volvo Penta | AD31L-A | 4-Stroke | 876511 |
| Volvo Penta | AD31P-A | 4-Stroke | 876511 |
Technical Specs
- Product Type
- Big-End Bearing Kit (Con Rod Bearing Kit)
- Installation
- Engine Internal Component
- Fuel Type
- Diesel
- Dimensions
- 10.0" L x 10.0" W x 5.0" H
- Other Technical Details
- Std D, SN2204141573-
What’s in the Box
- 1 x Big-End Bearing Kit
Installation Notes
- Ensure the engine is off, cool, and disconnected from the power source.
- Drain the engine oil completely following the manufacturer's guidelines.
- Access the connecting rods as detailed in your engine’s official service manual.
- Carefully remove the old connecting rod bearing shells, noting their orientation.
- Thoroughly clean the connecting rod and crankshaft journal surfaces of any oil or debris.
- Apply a generous amount of engine assembly lubricant to the new bearing shells and crankshaft journal.
- Install the new bearing shells into the connecting rod and cap.
- Reassemble the connecting rod and tighten the bolts to the precise torque specifications listed in the service manual.
- Continue reassembling all other components in the reverse order of disassembly.
- Refill the engine with the correct grade and amount of new engine oil.
- Reconnect the battery, start the engine, and check oil pressure and for any unusual noises.
Troubleshooting & FAQ
How do I know if this bearing kit will fit my specific engine?
This kit fits the Volvo Penta models listed in the compatibility table. Crucially, it is for engines with serial number SN2204141573 and later. Please verify your engine model and serial number before purchasing.
What are the common signs of a failing big-end bearing?
Symptoms of a worn or failed connecting rod bearing include a metallic knocking or tapping sound from the engine that often increases with RPM, low oil pressure readings, and potentially finding metallic particles in the engine oil during an oil change.
Is this a standard size or oversized bearing?
This is a standard dimension ("Std D") bearing kit. It is not intended for crankshafts that have been machined undersize.
Why is the serial number range important?
Manufacturers sometimes make mid-cycle changes to engine components. This part is specifically designed for engines built from serial number SN2204141573 onwards. Using it on an earlier engine may result in improper fitment and engine damage.
´Can I install this bearing kit myself?
This is an advanced repair that requires engine disassembly, precision measurement tools, and strict adherence to torque specifications. Professional installation by a qualified marine mechanic is strongly recommended to ensure safety and engine longevity.
What is the recommended replacement interval for con-rod bearings?
Big-end bearings do not have a fixed replacement interval. They are typically replaced during a full engine rebuild or when symptoms of wear, such as engine knock or low oil pressure, become apparent.
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.
