Connecting Rod Bearing Pair .25mm Oversized – Fits Volvo Penta Marine Engines (Replaces 3885324, 3586886)
Connecting Rod Bearing Pair .25mm Oversized – Fits Volvo Penta Marine Engines (Replaces 3885324, 3586886) 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 is a Connecting Rod Bearing Pair (.25mm Oversized) designed for various Volvo Penta marine diesel engines, including models in the D6 series. It provides a precise solution for crankshafts that have been machined to the first-degree oversize specification.
This component is a direct replacement for Volvo Penta part numbers 3885324 and 3586886.
- Engineered for marine diesel engine applications.
- Specially designed as a 0.25mm oversized bearing pair.
- Installed as an engine internal component.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3885324 |
| Volvo Penta | 3586886 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo Penta | D6-300A-F | 3885324 | Schematic Object Key 20 |
Technical Specs
- Product Type
- Connecting Rod Bearing Pair
- Oversize
- 0.25mm
- Application
- Marine Diesel Engines
- Installation
- Engine Internal Component
- Product Dimensions (cm)
- 17.0 x 8.0 x 6.0
- OEM Part Numbers
- 3885324, 3586886
What’s in the Box
- 1 x Connecting Rod Bearing Pair (.25mm Oversized) (Replaces 3885324/3586886)
Installation Notes
- Drain engine oil and coolant. Disconnect the battery and relevant electrical connections.
- Access the engine's bottom end by removing the oil pan and any interfering components.
- Carefully unbolt the connecting rod cap for the cylinder you are servicing. Note the orientation of the cap and bearings.
- Remove the old bearing shells from the rod and cap. Clean all surfaces meticulously, ensuring no oil, debris, or old bearing material remains.
- Inspect the crankshaft journal for scoring or damage. Ensure it has been machined to the correct 0.25mm oversize specification.
- Install the new bearing shells into the connecting rod and cap, ensuring the locating tangs are properly seated.
- Apply a liberal amount of assembly lube to the bearing surfaces and the crankshaft journal.
- Reinstall the connecting rod cap to the correct orientation and torque the bolts to the manufacturer's specification in the proper sequence.
- Rotate the crankshaft by hand to ensure smooth movement without binding.
- Reinstall the oil pan with a new gasket and all other components. Refill engine oil and coolant.
Troubleshooting & FAQ
How do I know if I need oversized bearings?
Oversized bearings are required only when the crankshaft has been machined (ground) to a smaller diameter during a rebuild. A machine shop will measure the crankshaft journals and inform you if they need grinding and which size bearings you will consequently need. These 0.25mm bearings are for crankshafts machined to the first oversize specification.
What are common signs of a failing connecting rod bearing?
Symptoms of a bad rod bearing include a persistent, rhythmic knocking sound from the engine that increases with RPM, low oil pressure readings, and potentially finding metallic particles (bearing material) in the engine oil during an oil change.
Is machining required to install these 0.25mm oversized bearings?
Yes. You cannot install oversized bearings on a standard-size crankshaft. The corresponding crankshaft connecting rod journal must be precisely machined down by a professional machine shop to accommodate the thicker, oversized bearing.
Is there a specific orientation for these bearings?
Yes, bearings have a locating tang (or notch) that must be seated correctly in the corresponding groove in the connecting rod and cap. They also have oiling holes that must align with the oil passages in the rod. Always follow the engine service manual for correct placement.
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.
