Connecting Rod Bearing Kit – Fits Volvo Penta D2-40 (Replaces 21132990)
Connecting Rod Bearing Kit – Fits Volvo Penta D2-40 (Replaces 21132990) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This is a high-quality aftermarket Connecting Rod Bearing Kit designed for Volvo Penta D2-40 series diesel engines. It is compatible with the D2-40A, D2-40B, and D2-40F models, which are 40 HP, 4-stroke powerplants using standard size bearings.
This kit serves as a direct replacement, providing an interchange for Volvo Penta part numbers 21132990 and its supersession, 3884564.
- Installation as an internal engine component requires precision and adherence to service manual specifications.
- Engineered specifically for diesel fuel applications.
- Includes standard size bearings for the D2-40 series.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Volvo Penta | 21132990 | 3884564 |
| Volvo Penta | 3884564 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for specific Volvo Penta D2-40 series engines. Please verify your model is listed.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Volvo Penta | D2-40A | 40 | 4-Stroke | 21132990/3884564 | |
| Volvo Penta | D2-40B | 40 | 4-Stroke | 21132990/3884564 | |
| Volvo Penta | D2-40F | 40 | 4-Stroke | 21132990/3884564 |
Technical Specs
- Product Type
- Connecting Rod Bearing Kit
- Installation
- Internal engine component
- Fuel Type
- Diesel
- Dimensions
- 7.0" H x 6.5" W x 6.5" L
- Other Technical Attributes
- Standard size bearings for D2-40 series
Installation Notes
- Ensure the engine is off, cool, and the battery is disconnected before starting work.
- Drain the engine oil completely and remove the oil pan to access the engine's bottom end.
- Following the engine's service manual, carefully unbolt and remove one connecting rod cap at a time.
- Note the orientation of the old bearing shells before removing them from the rod and cap.
- Thoroughly clean the surfaces of the connecting rod and cap, removing all oil and debris.
- Apply a generous amount of engine assembly lube to the new bearing shells.
- Install the new bearings into the rod and cap, ensuring they are seated correctly in their notches.
- Reinstall the connecting rod cap and torque the bolts to the manufacturer's specified values using a torque wrench.
- Repeat the process for the remaining cylinders.
- Reinstall the oil pan with a new gasket, refill with fresh engine oil, and reconnect the battery.
- Prime the oil system before the first start to ensure immediate lubrication.
- Start the engine and check for any oil leaks or unusual noises.
Troubleshooting & FAQ
How do I know if these bearings will fit my D2-40 engine?
This kit is specifically designed for Volvo Penta D2-40A, D2-40B, and D2-40F models. Always cross-reference the part numbers (21132990, 3884564) and check the compatibility table. If you are unsure, consult your engine's service manual or a qualified marine mechanic.
Are these bearings standard size or oversized?
These are standard size bearings. They are not intended for crankshafts that have been machined to an undersize dimension. Always measure your crankshaft journals to confirm the required bearing size before installation.
What are the signs of a failing connecting rod bearing?
Common symptoms include a persistent, rhythmic knocking or tapping sound from the engine (rod knock) that increases with RPM, low oil pressure, and the presence of metallic particles or flakes in the engine oil during an oil change.
How often should connecting rod bearings be replaced?
Connecting rod bearings do not have a fixed replacement interval and are typically replaced during a complete engine overhaul or when signs of wear or failure are detected. Their lifespan depends on factors like operating hours, maintenance quality, and load conditions.
Is any special tooling required for installation?
Yes, installation requires specialized tools, including a torque wrench to tighten bolts to precise specifications, and potentially micrometers to measure journal clearances. Access to the engine's official service manual is essential.
Do these bearings come pre-lubricated?
No, the bearings are shipped dry. They must be thoroughly coated with engine assembly lube before installation to prevent damage during the initial engine 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.
Payment & Security
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