Big End Bearing Kit – Fits Volvo Penta B30 Marine Engines (Replaces 271054)
Big End Bearing Kit – Fits Volvo Penta B30 Marine Engines (Replaces 271054) 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).
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 high-quality aftermarket Big End Bearing Kit – Fits Volvo Penta B30 Marine Engines (Replaces 271054). It is designed for the B30 6-cylinder gasoline engines used in Volvo Penta AQ165 and AQ170 marine applications from approximately 1969 to 1973. This kit provides the precision bearings necessary for connecting rod installation and engine rebuilds.
It is a direct replacement for Volvo Penta part numbers 271054 and the superseded part 876682, ensuring proper fit and function.
- Installation: Mounts internally within the engine block.
- Engine Fuel: Designed exclusively for gasoline engines.
- Fitting Type: Precision-engineered engine bearing for connecting rods.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Superseded By |
|---|---|---|
| Volvo Penta | 271054 | 876682 |
| Volvo Penta | 876682 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
For Volvo Penta Owners: This bearing kit is specifically for the B30 inline 6-cylinder engine block used in the AQ series sterndrive models listed.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AQ165A | 165 | 4-Stroke | 1969–1972 | 271054 | Inline 6-cylinder B30 engine |
| Volvo Penta | AQ170A | 170 | 4-Stroke | 1969–1972 | 271054 | Inline 6-cylinder B30 engine |
| Volvo Penta | AQ165 | 165 | 4-Stroke | 1969–1973 | 271054 | Inline 6-cylinder B30 engine |
| Volvo Penta | AQ170 | 170 | 4-Stroke | 1969–1973 | 271054 | Inline 6-cylinder B30 engine |
| Volvo Penta | B30 | - | 4-Stroke | 1969–1973 | 271054 | Base engine used in AQ165/170 |
Technical Specs
- Product Type
- Connecting Rod Bearing Kit
- Installation
- Engine Block Internal
- Fuel Type
- Gasoline
- Dimensions
- Height: 6.5; Width: 10.5; Length: 9.5;
- Fitting Type
- Precision Engine Bearing
- Warranty
- 12 months standard, 24 months when installed by an authorized Volvo Penta dealer
- Other Technical Attributes
- For B30 inline 6-cylinder engines
What’s in the Box
- 1 x Big-End Bearing Kit (equivalent to 271054)
Installation Notes
- Ensure the engine is off, cool, and all power is disconnected before starting work.
- Drain the engine oil completely and remove the oil pan to access the engine's bottom end.
- Carefully unbolt and remove the connecting rod caps one at a time. Keep them organized with their corresponding rods.
- Remove the old bearing shells from the rod and cap, noting any wear patterns.
- Thoroughly clean the connecting rod and cap surfaces, ensuring they are free of old oil, debris, and burrs.
- Apply a quality engine assembly lubricant to the surface of the new bearing shells.
- Install the new bearing shells into the connecting rod and cap, ensuring the locating tangs are seated correctly.
- Reinstall the rod cap and bolts, tightening them to the manufacturer's specified torque sequence and values.
- Check for smooth rotation of the crankshaft after each bearing is installed.
- Once all bearings are replaced, reinstall the oil pan using a new gasket.
- Refill the engine with the correct grade and quantity of new engine oil.
- Prime the oil system before starting the engine to ensure immediate lubrication.
Troubleshooting & FAQ
How do I confirm this bearing kit fits my specific B30 engine?
Verify your engine model (e.g., AQ170A) and year against our compatibility table. This is a standard size bearing kit for the models listed. If your engine has been rebuilt with an undersize crankshaft, you will need different bearings.
What are the signs of a failing big-end bearing?
Common symptoms include a persistent, deep knocking or hammering sound from the engine (rod knock) that increases with RPM, low oil pressure, and potentially metallic particles found in the engine oil during an oil change.
Is this a standard size or oversized bearing kit?
This is a standard size bearing kit. It is intended for use with crankshafts that have not been machined to an undersize diameter. Always measure your crankshaft journals to confirm the required bearing size before installation.
What is the correct installation torque for the connecting rod bolts?
Torque specifications are critical and specific to your engine model. Always refer to the official Volvo Penta service manual for your AQ165, AQ170, or B30 engine. Using incorrect torque values can lead to catastrophic engine failure.
When should connecting rod bearings be replaced?
Bearings should be replaced during any major engine overhaul or rebuild. They should also be inspected and potentially replaced if you experience symptoms of failure like low oil pressure or rod knock.
Is this part an OEM Volvo Penta product?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections for consistency.
What is the shipping speed and cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. Please see our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is strongly recommended for safety, performance, and to prevent engine damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with an average transit time of 5–15 days.
- Manufacturer-Direct Value — Our direct sourcing model ensures fair pricing without compromising on materials or quality control.
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