Main Bearing Kit, Standard – Fits Volvo Penta MD22 Series Diesel (Replaces 859791)
Main Bearing Kit, Standard – Fits Volvo Penta MD22 Series Diesel (Replaces 859791) 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
Main Bearing Kit, Standard – Fits Volvo Penta MD22 Series Diesel (R...
Product Details
This Main Bearing Kit, Standard size provides a direct-fit replacement for Volvo Penta MD22 series diesel engines (57–59 HP, 4-Stroke) estimated to be manufactured between 1995–2006. It is engineered to meet or exceed original equipment specifications for reliable performance.
It serves as a direct interchange for Volvo Penta part number 859791 and aftermarket equivalent REC859791.
- Installation involves internal engine access for replacing crankshaft main bearings.
- This is a standard size kit; an oversized version is also available for machined crankshafts.
- Designed for use in marine diesel engine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 859791 | Original OEM Number |
| Aftermarket | REC859791 | Direct Interchange |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Compatibility is confirmed for the Volvo Penta models listed below, covering the MD22 series diesel engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | MD22L-A | 57 | 4-Stroke | 1995–2006 | 859791 | |
| Volvo Penta | MD22L-B | 57 | 4-Stroke | 1995–2006 | 859791 | |
| Volvo Penta | MD22P-B | 59 | 4-Stroke | 1995–2006 | 859791 | |
| Volvo Penta | TAMD22P-B | 4-Stroke | 1995–2006 | 859791 | Turbocharged version | |
| Volvo Penta | TMD22-A | 4-Stroke | 1995–2006 | 859791 | ||
| Volvo Penta | TMD22-B | 4-Stroke | 1995–2006 | 859791 | ||
| Volvo Penta | TMD22P-C | 4-Stroke | 1995–2006 | 859791 | ||
| Volvo Penta | TMD22P-B | 4-Stroke | 1995–2006 | 859791 |
Technical Specs
- Product Type
- Main Bearing Kit, Standard Size
- Installation
- Internal engine component
- Fuel Type
- Diesel
- Dimensions
- Height: 13.0 cm, Width: 6.5 cm, Length: 6.5 cm
- Weight
- 0.3 kg (0.66 lb)
- Other Technical Attributes
- Standard size (not oversized)
What’s in the Box
- Main Bearing Kit (1 Assembly)
Installation Notes
Follow your engine’s official service manual for detailed procedures. These are general, non-binding guidelines:
- Disconnect the battery and safely remove the engine from the vessel if required for access.
- Drain engine oil and coolant. Remove the oil pan to access the crankshaft.
- Carefully remove the main bearing caps, noting their orientation and order.
- Gently lower or remove the crankshaft to access all main bearing shells.
- Clean all surfaces meticulously. Ensure no debris enters oil passages.
- Lubricate the new bearings and crankshaft journals with a quality engine assembly lube.
- Install the new bearing shells into the engine block and caps, ensuring they are seated correctly.
- Reinstall the crankshaft and main caps. Torque all bolts to the manufacturer’s specified values and in the correct sequence.
- Check for proper crankshaft rotation (by hand) before reinstalling the oil pan and other components.
Troubleshooting & FAQ
How do I confirm this bearing kit fits my engine?
First, verify your engine model is in the Engine & Model Compatibility table. Second, cross-reference your current part number against the aformentioned list. This kit directly replaces Volvo Penta 859791.
Is this a standard or oversized kit?
This is a standard-size kit. If your crankshaft has been machined, you may need an oversized kit. An oversized option (0.30mm) is available separately as part number 859945.
What are the signs of failing main bearings?
Common symptoms include a deep, heavy knocking noise from the engine (especially under load), low oil pressure readings at idle and operating speeds, and metallic shavings (often copper or silver colored) in the engine oil.
When should engine main bearings be replaced?
Main bearings are typically replaced during a major engine overhaul, rebuild, or when addressing crankshaft-related failures. They are not a routine maintenance item but are critical to engine longevity.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
This product is 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 if the part is unused and in its original condition. Please see our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against 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 quality control.
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.
