Serpentine Belt Tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L V8 Engines – Replaces 3885250, 3587858, 3587859, 3861010
Serpentine Belt Tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L V8 Engines – Replaces 3885250, 3587858, 3587859, 3861010 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Serpentine Belt Tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L...
Serpentine Belt Tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L V8 Engines – Replaces 3885250, 3587858, 3587859, 3861010 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket serpentine belt tensioner is designed for Volvo Penta marine applications using 4.3L, 5.0L, 5.7L and 8.1L V8 engines. It is supplied as a single replacement tensioner for the belt-drive system.
Use the original component and the engine model information to verify compatibility before ordering. The applicable Volvo Penta reference numbers are 3885250, 3587858, 3587859 and 3861010.
- Replacement belt tensioner for selected Volvo Penta stern-drive and out-drive applications.
- Designed to maintain proper serpentine-belt tension during engine operation.
- Single-component replacement; belt and mounting hardware are not included unless specifically shown or stated.
Part Number Matrix
These are the manufacturer reference numbers listed for this replacement tensioner. Confirm the number on your original part before purchase.
| Brand | Reference Part Number |
|---|---|
| Volvo Penta | 3885250 |
| Volvo Penta | 3587858 |
| Volvo Penta | 3587859 |
| Volvo Penta | 3861010 |
Engine Compatibility
The company fitment record identifies this tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L V8 applications. Available catalog information groups the reference numbers with the following model families:
| Brand | Engine family or model series | Engine size | Reference numbers |
|---|---|---|---|
| Volvo Penta | 4.3 GL, 4.3 GI, 4.3 GXI, 4.3 OSI | 4.3L V8 | 3885250, 3587858 |
| Volvo Penta | 5.0 GI, 5.0 GXI, 5.0 OSI | 5.0L V8 | 3885250, 3587858 |
| Volvo Penta | 5.7 GI, 5.7 GXI, 5.7 OSI | 5.7L V8 | 3885250, 3587858 |
| Volvo Penta | 8.1 GI, 8.1 GXI, 8.1 IPSCE, 8.1 OSI | 8.1L V8 | 3885250, 3587859, 3861010 |
Model suffixes, production configurations and serial-number ranges can affect fitment. If your exact model or reference number is not listed, compare the original tensioner and consult the engine service information before ordering.
Technical Specifications
- Product type
- Serpentine belt tensioner
- Application
- Volvo Penta stern-drive and out-drive marine engines
- Engine families
- 4.3L, 5.0L, 5.7L and 8.1L V8
- Replacement references
- 3885250, 3587858, 3587859 and 3861010
- Quantity
- One tensioner
- Product status
- Aftermarket replacement; not an OEM-branded component
What's in the Box
- 1 x Serpentine belt tensioner
Belts, pulleys, fasteners and other accessories are not included unless shown in the product photos or separately stated.
Installation Notes
- Disconnect the boat's battery and allow the engine to cool before beginning work.
- Locate the serpentine belt and tensioner assembly in the engine bay.
- Use the correct serpentine-belt tool or breaker bar to release belt tension, then remove the belt from the pulleys.
- Remove the existing tensioner and retain any original spacers or washers that are required for installation.
- Install the replacement tensioner in the original position and tighten the mounting fasteners to the torque specified in the engine service information.
- Route the belt according to the belt-routing diagram for the specific engine.
- Release the tensioner carefully and verify that the belt is fully seated in every pulley groove.
- Reconnect the battery, start the engine and check for correct belt tracking and abnormal noise.
Troubleshooting & FAQ
What are common signs of a failing belt tensioner?
Squealing, rattling or grinding from the belt-drive area, irregular tensioner-arm movement, belt misalignment and uneven belt wear can indicate a worn tensioner or another belt-drive problem. Inspect the complete system before replacing one component.
Does this listing include the serpentine belt?
No. This listing is for one belt tensioner only. The serpentine belt and other installation parts are not included unless specifically stated.
Will this fit every Volvo Penta V8 engine?
No. It is intended for the listed 4.3L, 5.0L, 5.7L and 8.1L V8 applications and reference numbers. Verify the exact engine model, configuration and original part number before ordering.
Is this an OEM part?
This is an aftermarket replacement, not an OEM-branded Volvo Penta component. It is listed as a replacement for the reference numbers shown above.
What should I do if my part number is not listed?
Do not assume compatibility from engine displacement alone. Compare the original tensioner, mounting arrangement and reference number with the product information, or consult a qualified marine technician.
How often should the tensioner be inspected?
Inspect the tensioner whenever the serpentine belt is serviced and during routine engine maintenance. Replace it if the pulley is noisy, the arm moves unevenly, or the belt does not track correctly.
Safety & Important Information
- Disconnect the battery before working around the engine belt system.
- Never work on a running engine or a hot belt-drive assembly.
- Verify the reference number, engine model and component appearance before purchase.
- Professional installation is recommended when the correct belt-routing or torque information is unavailable.
About Sea Sierra
- Marine replacement parts selected for common service and repair applications.
- Product information organized around manufacturer reference numbers and engine fitment.
- Support available to help verify compatibility before ordering.
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