Big-End Bearing Kit – Fits Volvo Penta MD2030-C Engine (Replaces 876683)
Big-End Bearing Kit – Fits Volvo Penta MD2030-C Engine (Replaces 876683) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This is a U.S. oversized (0.25mm) Big-End Bearing Kit – Fits Volvo Penta MD2030-C Engine. Specifically designed for diesel marine applications, this kit ensures a precise fit for connecting rod big-end journals that have been machined to the first oversize specification, restoring critical engine tolerances.
This part serves as a direct replacement for Volvo Penta OEM part number 876683. It is also an interchange for the standard size bearing (876682) and the second oversize (0.50mm) bearing (876684) when the corresponding journal work has been performed.
- Engineered for the Volvo Penta MD2030-C marine diesel engine.
- Provides a 0.25mm oversize solution for crankshaft journal restoration.
- Kit contains bearings for the connecting rod big end.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 876683 | Primary OEM reference for 0.25mm oversize |
| Volvo Penta | 876682 | Equivalent standard size bearing |
| Volvo Penta | 876684 | Equivalent 0.50mm oversize bearing |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo Penta | MD2030-C | 876683 | Oversize (0.25mm) |
Technical Specs
- Product Type
- Big-End Bearing Kit
- Application
- Volvo Penta MD2030-C Marine Engine
- Size Specification
- U.S=0.25mm (oversize)
- Engine Type
- Diesel
- OEM Part Number
- 876683
- Dimensions
- 5.0" x 5.0" x 5.0"
- Other Technical Attributes
- Oversized bearings (0.25mm) for connecting rod big end
What’s in the Box
- Big-End Bearing Kit (Replaces 876683)
Installation Notes
- Ensure the engine is cool. Disconnect the battery and drain the engine oil completely.
- Access the engine's bottom end by removing the oil pan.
- Identify the connecting rod requiring the bearing replacement.
- Carefully unbolt and remove the connecting rod cap.
- Remove the old upper and lower bearing shells from the rod and cap.
- Thoroughly clean the rod, cap, and crankshaft journal surfaces. Ensure they are free of oil, debris, and burrs.
- Apply assembly lube to the new bearing shells.
- Install the new bearing shells into the rod and cap, ensuring the locking tabs are correctly seated.
- Reinstall the connecting rod cap and torque the bolts to the manufacturer's specifications using a calibrated torque wrench.
- Check for proper rod movement and clearance.
- Reinstall the oil pan with a new gasket and refill the engine with fresh oil.
- Reconnect the battery and start the engine, checking for proper oil pressure and listening for any unusual noises.
Troubleshooting & FAQ
How do I know if I need oversized bearings?
Oversized bearings, such as this 0.25mm kit, are required when the crankshaft's connecting rod journal has been machined (ground down) to remove wear or damage. This is a common procedure during an engine rebuild. Always measure the journal with a micrometer to determine the correct bearing size needed.
What are the signs of a failed big-end bearing?
The most common symptom is a "rod knock"—a distinct, rhythmic knocking or hammering sound from the lower part of the engine that often increases with RPM. Other signs can include low oil pressure, metallic particles in the engine oil, and eventual engine seizure if left unaddressed.
Can I use this kit if my engine is not a MD2030-C?
This kit is specifically listed for the Volvo Penta MD2030-C engine. Using it in other models is not recommended unless you have cross-referenced the OEM part number (876683) and confirmed it is the correct size for your specific application. Always verify part compatibility before purchase.
Is assembly lube necessary for installation?
Yes, using a high-quality engine assembly lube on the bearing surfaces and crankshaft journal is critical. This protects the components from scoring and seizing during the initial engine startup before normal oil circulation is established.
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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