Main Bearing Kit 0.30 mm – Fits Volvo Penta MD22, TMD22, TAMD22 (Replaces 859945)
Main Bearing Kit 0.30 mm – Fits Volvo Penta MD22, TMD22, TAMD22 (Replaces 859945) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Main Bearing Kit 0.30 mm – Fits Volvo Penta MD22, TMD22, TAMD22 (Re...
Product Details
This is a Main Bearing Kit 0.30 mm – Fits Volvo Penta MD22, TMD22, TAMD22 (Replaces 859945) designed for rebuilding Volvo Penta marine diesel inboard engines in the MD22, TMD22, and TAMD22 series. It provides the essential components for restoring crankshaft function and engine reliability.
This kit directly replaces Volvo Penta OEM part number 859945.
- Oversize Specification: 0.30 mm for cranks needing regrinding.
- Installation Location: Mounts within the engine block to support the crankshaft.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 859945 |
Engine & Model Compatibility
Confirm your engine model in the table below.
For Volvo Penta owners, please verify your specific model is listed to ensure correct fitment.
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| Volvo Penta | MD22A | 4-Stroke | 859945 |
| Volvo Penta | MD22L-A | 4-Stroke | 859945 |
| Volvo Penta | MD22L-B | 4-Stroke | 859945 |
| Volvo Penta | MD22P-B | 4-Stroke | 859945 |
| Volvo Penta | TMD22A | 4-Stroke | 859945 |
| Volvo Penta | TMD22-B | 4-Stroke | 859945 |
| Volvo Penta | TMD22P-C | 4-Stroke | 859945 |
| Volvo Penta | TMD22P-B | 4-Stroke | 859945 |
Technical Specs
- Product Type
- Main Bearing Kit (Oversized)
- Oversize
- 0.30 mm
- Compatible Engines
- Volvo Penta MD22, TMD22, TAMD22 diesel engines
- Installation Location
- Engine Block - Crankshaft
- Product Dimensions
- 16.0 L x 7.5 W x 3.0 H
- Weight
- 0.23 kg (0.51 lb)
What’s in the Box
- 1 x Main Bearing Kit 0.30 mm (Replaces 859945)
Installation Notes
- Always consult your engine's official service manual for detailed procedures and torque specifications.
- Thoroughly clean the crankshaft, bearing saddles, and main caps before installation. Ensure no oil, debris, or old bearing material remains.
- Place the upper bearing shells into the engine block saddles and the lower shells into the main caps, ensuring the locating tangs are correctly seated.
- Apply a generous amount of high-quality engine assembly lube to all bearing surfaces.
- Carefully lower the crankshaft into place. Install the main caps and hand-tighten the bolts.
- Following the manual's specified sequence and torque stages, tighten the main cap bolts to the final torque value using a calibrated torque wrench.
Troubleshooting & FAQ
How do I know if I need 0.30 mm oversized bearings?
Oversized bearings are used when a crankshaft has been machined (ground down) to remove scoring or wear. After machining, the journal diameter is smaller, requiring thicker bearings to maintain proper oil clearance. Your machine shop will tell you the required oversize (e.g., 0.10, 0.20, 0.30 mm) after they measure the crank.
Will this kit fit my specific TAMD22 engine model?
This kit is compatible with the listed Volvo Penta MD22, TMD22, and TAMD22 series engines. Please cross-reference your exact model with our compatibility table and verify the OEM part number 859945 matches your service records.
What are the signs of main bearing failure?
Common symptoms include a deep, knocking sound from the bottom of the engine that increases with RPM, low oil pressure, and the presence of metallic flakes (bearing material) in the engine oil during an oil change.
Is any special preparation required before installation?
Yes. Absolute cleanliness is critical. Ensure the bearing surfaces on the block and crankshaft are immaculate. Use a high-quality assembly lube on the bearings and journals to ensure proper lubrication on initial startup.
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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