Thermostat – Fits Volvo Penta 4.3L–8.2L Engines, 160°F, Replaces 3831426
Thermostat – Fits Volvo Penta 4.3L–8.2L Engines, 160°F, Replaces 3831426 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Thermostat – Fits Volvo Penta 4.3L–8.2L Engines, 160°F, Replaces 3831426 is backordered and will ship as soon as it is back in stock.
Product Details
This 160°F thermostat is designed for selected Volvo Penta stern-drive and inboard/outboard gasoline marine engines in 4.3L, 5.0L, 5.7L, 5.8L, 7.4L, 8.1L, and 8.2L applications. It helps regulate engine coolant temperature for dependable operation in freshwater-cooled systems.
This is a single aftermarket thermostat, not a complete gasket or seal kit. It is listed as a replacement for Volvo Penta reference numbers 3831426, 875788, 824200, and 1544389. Sierra reference 18-3539 is also associated with the 160°F closed-cooling thermostat application.
- 160°F / 71°C operating temperature rating.
- Designed for listed Volvo Penta 4.3L–8.2L applications.
- Direct replacement thermostat for the original application.
- Single thermostat supplied; seals and gaskets are not included unless separately stated for your order.
Part Number Matrix
Use these manufacturer and aftermarket references to compare the thermostat with the part being replaced. Reference numbers do not replace confirmation of the exact engine application.
| Brand | Reference Number | Reference Type |
|---|---|---|
| Volvo Penta | 3831426 | OEM reference |
| Volvo Penta | 875788 | OEM reference |
| Volvo Penta | 824200 | OEM reference |
| Volvo Penta | 1544389 | OEM reference |
| Sierra | 18-3539 | Aftermarket reference |
Engine & Model Compatibility
The company fitment record identifies the following Volvo Penta engine displacement applications. Exact model designation, cooling configuration, and serial-number requirements can vary, so compare the original thermostat and consult the engine service documentation before ordering.
| Brand | Engine Displacement | Application | Temperature | Primary OEM Reference |
|---|---|---|---|---|
| Volvo Penta | 4.3L | All models listed in the company fitment record | 160°F / 71°C | 3831426 |
| Volvo Penta | 5.0L | All models listed in the company fitment record | 160°F / 71°C | 3831426 |
| Volvo Penta | 5.7L | All models listed in the company fitment record | 160°F / 71°C | 3831426 |
| Volvo Penta | 5.8L | All models listed in the company fitment record | 160°F / 71°C | 3831426 |
| Volvo Penta | 7.4L | All models listed in the company fitment record | 160°F / 71°C | 3831426 |
| Volvo Penta | 8.1L | All models listed in the company fitment record | 160°F / 71°C | 3831426 |
| Volvo Penta | 8.2L | All models listed in the company fitment record | 160°F / 71°C | 3831426 |
Technical Specs
- Product Type
- Marine engine thermostat
- Application
- Volvo Penta stern-drive and inboard/outboard applications
- Temperature Rating
- 160°F / 71°C
- Cooling System
- Primarily specified for freshwater / closed cooling applications
- Engine Range
- 4.3L, 5.0L, 5.7L, 5.8L, 7.4L, 8.1L, and 8.2L applications
- Installation
- Direct replacement of the original thermostat
- Product Configuration
- Single thermostat; gasket and sealing components are not included
- Brand Status
- Aftermarket replacement, not an OEM-branded component
What’s in the Box
- 1 x Thermostat
Important: O-rings, gaskets, sealants, and other installation hardware are not included with this single-thermostat listing unless specifically shown or stated in the order details.
Installation Notes
- Allow the engine to cool completely and disconnect the battery before beginning work.
- Drain coolant to a level below the thermostat housing when required by the engine service procedure.
- Remove the thermostat housing cover and note the orientation of the old thermostat.
- Remove the old thermostat and clean the mating surfaces carefully.
- Inspect the existing gasket or O-ring and replace it with the correct application-specific seal if necessary. Replacement seals are not included with this listing.
- Install the new thermostat in the correct orientation.
- Reinstall the housing cover and tighten the fasteners to the engine manufacturer’s specified torque.
- Refill the cooling system with the correct coolant and bleed or vent the system according to the service manual.
- Reconnect the battery, run the engine, and check operating temperature and the housing area for leaks.
Troubleshooting & FAQ
How do I know if my thermostat is failing?
Possible symptoms include overheating, an unusually low temperature reading, slow warm-up, erratic temperature changes, or coolant leakage around the thermostat housing. These symptoms can have other causes, so inspect the complete cooling system before replacing the thermostat.
What is the correct operating temperature for this thermostat?
This thermostat is rated at 160°F / 71°C. Confirm that this temperature matches the requirement for your specific Volvo Penta engine and cooling system.
Is this thermostat for raw-water or freshwater cooling?
The documented application is primarily for freshwater, closed-cooling systems. Do not install it in a raw-water system unless your engine documentation specifically calls for this temperature and application.
Does this listing include the O-ring or gasket?
No. The company product record identifies this item as a single thermostat rather than a kit. Obtain the correct replacement gasket or O-ring separately if the existing seal is damaged or the service procedure requires replacement.
Is this an OEM thermostat?
This is an aftermarket replacement. The listed OEM numbers are reference numbers used to identify compatible applications; the product is not sold as an OEM-branded component.
How should I confirm fitment?
Compare the original thermostat, temperature rating, housing arrangement, engine displacement, and applicable engine model or serial information. If any of these details do not match, consult the engine service manual before ordering.
Shipping speed & cost
Standard shipping is free where offered. Typical international transit is 5–15 days, while expedited options may be available at checkout depending on destination.
Warranty & returns
This product is covered by the seller’s applicable warranty and return policies. Contact support with your order details if you receive a damaged, defective, or incorrect item.
Safety & Important Information
- Work only on a completely cool engine and follow the manufacturer’s service procedures.
- Verify the thermostat temperature rating and application before installation.
- Check whether your engine requires a separate gasket or O-ring; this single-thermostat listing does not include those components.
- Do not rely on engine displacement alone when model, serial-number, or cooling-system requirements are different.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when cooling-system service procedures are unfamiliar.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for common marine engine and stern-drive service applications.
- Application-Focused Listings — Product references and fitment details are provided to help you compare the replacement with the original part.
- Support When Needed — Contact our support team with your engine model and existing part information when you need help confirming an application.
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