Main Bearing Kit – Fits Volvo Penta 5.7L Marine Engines (Replaces 21132989)
Main Bearing Kit – Fits Volvo Penta 5.7L Marine Engines (Replaces 21132989) 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
Main Bearing Kit – Fits Volvo Penta 5.7L Marine Engines (Replaces 2...
Product Details
This is an aftermarket Main Bearing Kit designed for a range of Volvo Penta 5.7L marine engines, including the 5.7Gi, 5.7OSi, 5.7GXi, and 5.7OSXi series. It serves as a high-quality replacement for worn or damaged main bearings, ensuring proper crankshaft rotation and engine reliability.
This kit is a direct replacement for Volvo Penta part number 21132989.
- Installs within the engine block.
- Compatible with gasoline-fueled engines.
- Engineered to meet or exceed original equipment specifications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 21132989 |
Engine & Model Compatibility
Confirm your engine model in the table below.
This component is verified to fit the listed Volvo Penta engine models.
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| Volvo Penta | 5.7Gi-J, 5.7Gi-N | 4-Stroke | 21132989 |
| Volvo Penta | 5.7OSi-J | 4-Stroke | 21132989 |
| Volvo Penta | 5.7GXi-J, 5.7GXi-N | 4-Stroke | 21132989 |
| Volvo Penta | 5.7OSXi-J | 4-Stroke | 21132989 |
| Volvo Penta | 5.7Gi-CF, 5.7Gi-DF | 4-Stroke | 21132989 |
| Volvo Penta | 5.7OSi-BF, 5.7OSi-CF | 4-Stroke | 21132989 |
| Volvo Penta | 5.7Gi-FF, 5.7Gi-GF | 4-Stroke | 21132989 |
| Volvo Penta | 5.7OSi-EF, 5.7OSi-GF | 4-Stroke | 21132989 |
| Volvo Penta | 5.7GI-300-P, 5.7GI-300-R | 4-Stroke | 21132989 |
| Volvo Penta | 5.7GIE-300-P, 5.7GIE-300-R | 4-Stroke | 21132989 |
| Volvo Penta | 5.7Gi-A | 4-Stroke | 21132989 |
| Volvo Penta | 5.7GXi-A, 5.7GXi-B | 4-Stroke | 21132989 |
| Volvo Penta | 5.7Gi-B, 5.7OSi-A | 4-Stroke | 21132989 |
| Volvo Penta | 5.7GXi-C, 5.7OSXi-A | 4-Stroke | 21132989 |
| Volvo Penta | 5.7Gi-E, 5.7OSi-D | 4-Stroke | 21132989 |
| Volvo Penta | 5.7Gi-EF, 5.7OSi-DF | 4-Stroke | 21132989 |
| Volvo Penta | 5.7GIC-300-J, 5.7GICE-300-J, 5.7GICE-300-M | 4-Stroke | 21132989 |
| Volvo Penta | 5.7GIC-300-JF, 5.7GICE-300-JF, 5.7GICE-300-MF | 4-Stroke | 21132989 |
| Volvo Penta | 5.7GIC-300-P, 5.7GIC-300-R | 4-Stroke | 21132989 |
| Volvo Penta | 5.7GICE-300-P, 5.7GICE-300-R | 4-Stroke | 21132989 |
Technical Specs
- Product Type
- Main Bearing Kit
- Installation
- Engine Block
- Fuel Type
- Gasoline
- Dimensions
- 7.0" x 6.5" x 6.5"
- Warranty
- Volvo Penta Standard Warranty
- Other Technical Attributes
- Built to genuine OEM Volvo Penta part specifications
What’s in the Box
- 1 x Main Bearing Kit (Replaces 21132989)
Installation Notes
Professional installation is highly recommended for this component. The process involves disassembling the engine block, carefully removing the old bearings, cleaning all surfaces, and installing the new bearings with proper lubrication and torque specifications. Specialized tools such as a torque wrench, bearing pullers, and micrometers are required for correct fitment and function.
Troubleshooting & FAQ
How do I confirm this kit fits my specific engine model?
Please review the comprehensive compatibility table provided on this page. Match your engine's model number against the list to ensure a correct fit before ordering.
What are the signs of a failing main bearing?
Common symptoms include a persistent engine knocking or rumbling sound that increases with RPM, low oil pressure readings, and the presence of metallic particles in the engine oil during an oil change.
Is this a complete kit for a full engine rebuild?
This kit contains the main bearings. A complete engine rebuild will typically require additional components such as piston rings, gaskets, seals, and connecting rod bearings, which are sold separately.
Do I need special tools for this installation?
Yes, installation requires specialized tools, including a calibrated torque wrench, bearing installation tools, and precision measuring instruments. Access to an engine hoist and stand is also necessary. For these reasons, professional installation is strongly advised.
Is there a recommended replacement interval for main bearings?
Main bearings do not have a fixed replacement interval and are typically replaced during a major engine overhaul or when signs of wear or failure become evident. Their lifespan depends heavily on engine maintenance, lubrication quality, and operating conditions.
What is the difference between an OEM part and this aftermarket one?
This listing is an aftermarket replacement, not an OEM part. It is built to OEM-level specifications with comparable materials. All parts are manufactured in an ISO 9001 certified facility and are batch-inspected for quality and consistency.
How fast is shipping and what does it cost?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free to most locations, with expedited options available at checkout where applicable.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If an issue arises, contact our support team with your order details. Returns are accepted within our standard window for items that are unused and 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 is listed as compatible—do not purchase.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is recommended for safety and performance.
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 — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
Payment & Security
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