Volvo Penta Thermostat – 82°C (180°F), Fits MD31/MD41 Modern Version and KAD32/42/43/44/300 Engines
Volvo Penta Thermostat – 82°C (180°F), Fits MD31/MD41 Modern Version and KAD32/42/43/44/300 Engines is backordered and will ship as soon as it is back in stock.
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Volvo Penta Thermostat – 82°C (180°F), Fits MD31/MD41 Modern Versio...
Volvo Penta Thermostat – 82°C (180°F), Fits MD31/MD41 Modern Version and KAD32/42/43/44/300 Engines is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket 82°C (180°F) thermostat is designed for selected Volvo Penta marine diesel applications, including the modern-version MD31 and MD41 engines and KAD32, KAD42, KAD43, KAD44, and KAD300 engines. It is intended as a replacement thermostat for cooling-system service where the original part specification matches.
The thermostat cross-references Volvo Penta part numbers 3831424, 875849, and 876128. Sierra reference 18-3538 is also associated with this application.
- Aftermarket replacement thermostat for Volvo Penta marine applications.
- Rated opening temperature: 82°C (180°F).
- Sold as one thermostat.
- Verify the engine version and original part number before ordering.
Part Number Cross-Reference
These references are provided for identification and cross-checking. Confirm the exact application against your engine and existing part before installation.
| Brand | Reference | Reference Type |
|---|---|---|
| Volvo Penta | 3831424 | OEM reference |
| Volvo Penta | 875849 | OEM reference |
| Volvo Penta | 876128 | OEM reference |
| Sierra | 18-3538 | Aftermarket reference |
Engine Compatibility
This listing covers the following fitment scope. Model version and original thermostat reference must match.
| Brand | Engine Application | Version or Condition | Opening Temperature | OEM References |
|---|---|---|---|---|
| Volvo Penta | MD31, MD41 | Modern version | 82°C (180°F) | 3831424, 875849, 876128 |
| Volvo Penta | KAD32, KAD42, KAD43, KAD44, KAD300 | Confirm the exact engine configuration and original part | 82°C (180°F) | 3831424, 875849, 876128 |
Technical Specifications
- Product Type
- Marine engine thermostat
- Application
- Volvo Penta stern-drive and out-drive applications listed above
- Opening Temperature
- 82°C (180°F)
- Fuel or Cooling Application
- Marine diesel engine cooling system
- Installation
- Replacement component; confirm the original thermostat specification before installation
- Quantity
- One thermostat
- Brand Status
- Aftermarket replacement, not a Volvo Penta genuine branded component
What's in the Box
- 1 x 82°C (180°F) thermostat
Any gasket, sealing ring, housing, or additional installation hardware is not specified as included with this product. Replace sealing components as required for your engine and installation.
Installation Notes
- Allow the engine and cooling system to cool completely before beginning work.
- Disconnect the battery and drain enough coolant to lower the level below the thermostat housing.
- Remove the thermostat housing cover and note the orientation of the original thermostat.
- Remove the old thermostat and clean the mating surfaces without damaging the housing.
- Install the replacement thermostat in the same orientation as the original component.
- Install suitable new sealing components where required, then refit the housing cover and tighten fasteners to the engine manufacturer's specification.
- Refill the cooling system with the correct coolant, bleed air as required, and inspect for leaks.
- Run the engine and monitor coolant temperature to confirm normal operation.
Troubleshooting & FAQ
How do I confirm that this thermostat fits my engine?
Confirm that your engine is a Volvo Penta modern-version MD31 or MD41, or a KAD32, KAD42, KAD43, KAD44, or KAD300 application, and that the original thermostat matches one of the listed references: 3831424, 875849, or 876128. When in doubt, compare the original part and consult the engine service documentation.
What is the thermostat opening temperature?
This thermostat is specified to open at 82°C (180°F).
Is this a thermostat kit?
This listing contains one thermostat. The product is not supplied as a complete housing assembly or as a multi-part kit.
Is a gasket or sealing ring included?
Additional sealing components are not specified as included. Inspect the existing sealing components and use the correct replacement gasket or seal for your engine during installation.
What are common signs of a failing thermostat?
Possible symptoms include overheating, failure to reach normal operating temperature, unstable temperature readings, or coolant leakage around the thermostat housing. Diagnose the cooling system before replacing parts.
Is this an OEM component?
This is an aftermarket replacement thermostat. The listed Volvo Penta numbers are reference numbers for application identification and are not a claim that this product is manufactured by Volvo Penta.
Safety & Important Information
- Never open a hot cooling system. Allow the engine to cool before removing the thermostat housing.
- Verify the engine version, original thermostat, opening temperature, and reference number before ordering.
- Do not rely on model-family names alone; related engines can use different thermostat specifications.
- Use the correct coolant and follow the engine manufacturer's service procedures.
- Professional installation is recommended when the cooling system or engine configuration is unfamiliar.
About Sea Sierra
- We supply aftermarket marine replacement parts selected for practical service applications.
- Product fitment should always be confirmed against the engine model, version, and original component.
- Our product information is intended to support accurate part identification and installation planning.
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