Thermostat Kit – Fits Volvo Penta KAD32/42/43/44, AD31/41, TAMD41/42 Marine Diesel Engines (Replaces 3831424)
Thermostat Kit – Fits Volvo Penta KAD32/42/43/44, AD31/41, TAMD41/42 Marine Diesel Engines (Replaces 3831424) is backordered and will ship as soon as it is back in stock.
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Thermostat Kit – Fits Volvo Penta KAD32/42/43/44, AD31/41, TAMD41/4...
Thermostat Kit – Fits Volvo Penta KAD32/42/43/44, AD31/41, TAMD41/42 Marine Diesel Engines (Replaces 3831424) is backordered and will ship as soon as it is back in stock.
Product Details
This Thermostat Kit – Fits Volvo Penta KAD32/42/43/44, AD31/41, TAMD41/42 Marine Diesel Engines is engineered for Volvo Penta marine diesel engines in the 31, 32, 41, 42, 43, and 44 series, including KAD, KAMD, AD, TAMD, and TMD variants. It is designed to maintain a precise operating temperature of 82°C (179.6°F).
It serves as a direct replacement for Volvo Penta part numbers 3831424, 273952, 467015, 876128, 875849, and 1544390, and aftermarket equivalent Sierra 18-3538.
- Designed for direct OE replacement installation.
- Maintains a factory-specified opening temperature of 82°C (179.6°F).
- Note: Two units are typically required per engine.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3831424 |
| Volvo Penta | 273952 |
| Volvo Penta | 467015 |
| Volvo Penta | 876128 |
| Volvo Penta | 875849 |
| Volvo Penta | 1544390 |
| Sierra | 18-3538 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits a wide range of Volvo Penta diesel engines. Check your specific model against the list.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AD31A, AD31B, AD31D-A, AD31L-A, AD31P-A, AD31XD | 4-Stroke | 3831424 | |||
| Volvo Penta | AQAD31A, MD31A | 4-Stroke | 3831424 | |||
| Volvo Penta | TAMD31A, TAMD31B, TAMD31D, TAMD31L-A, TAMD31M-A, TAMD31P-A, TAMD31S-A | 4-Stroke | 3831424 | |||
| Volvo Penta | TMD31A, TMD31B, TMD31D, TMD31L | 4-Stroke | 3831424 | |||
| Volvo Penta | KAD32P, KAD32P-A | 4-Stroke | 3831424 | |||
| Volvo Penta | AD41A, AD41B, AD41D, AD41L-A, AD41P-A | 4-Stroke | 3831424 | |||
| Volvo Penta | AQAD41A, D41A, D41B, D41D, D41L-A | 4-Stroke | 3831424 | |||
| Volvo Penta | TAMD41A, TAMD41B, TAMD41D, TAMD41H-A, TAMD41H-B, TAMD41L-A, TAMD41M-A, TAMD41P-A | 4-Stroke | 3831424 | |||
| Volvo Penta | TMD41A, TMD41B, TMD41D, TMD41L-A | 4-Stroke | 3831424 | |||
| Volvo Penta | KAD42A, KAD42B, KAD42P-A | 4-Stroke | 3831424 | |||
| Volvo Penta | KAMD42A, KAMD42B, KAMD42P-A | 4-Stroke | 3831424 | |||
| Volvo Penta | TAMD42B, TAMD42WJ-A | 4-Stroke | 3831424 | |||
| Volvo Penta | KAD43P, KAD43P-A, KAMD43P, KAMD43P-A | 4-Stroke | 3831424 | |||
| Volvo Penta | KAD44P, KAD44P-A, KAD44P-B, KAD44P-C | 4-Stroke | 3831424 | |||
| Volvo Penta | KAMD44P, KAMD44P-A, KAMD44P-B, KAMD44P-C | 4-Stroke | 3831424 | |||
| Volvo Penta | KAD300, KAD300A, KAMD300, KAMD300A | 4-Stroke | 3831424 | |||
| Volvo Penta | TD70G, TD100CHC, TD100CRC | 4-Stroke | 3831424 | |||
| Volvo Penta | TMD100B, TMD100C | 4-Stroke | 3831424 | |||
| Volvo Penta | TAMD102A, TAMD102D, TMD102A | 4-Stroke | 3831424 | |||
| Volvo Penta | TAMD103A-A, TAMD103A-A AUX | 4-Stroke | 3831424 | |||
| Volvo Penta | TAD120CHC, TMD120B | 4-Stroke | 3831424 | |||
| Volvo Penta | TAD121CHC, TD121CHC, TD121CRC, TMD121C, TAMD121C, TAMD121D | 4-Stroke | 3831424 | |||
| Volvo Penta | TAMD122A, TAMD122C, TAMD122D, TAMD122P, TAMD122P-C, TMD122A | 4-Stroke | 3831424 |
Technical Specs
- Product Type
- Marine Engine Thermostat
- Installation
- OE Replacement
- Opening Temperature
- 82°C (179.6°F)
- Fuel Type
- Diesel
- Housing Color
- Metallic/Brass
- Dimensions
- Approximately 53mm diameter × 36mm height (2.1" × 1.4")
- Fitting Type
- Direct OE Fit
- Operating Temperature
- 82°C (179.6°F)
- Warranty
- Varies by manufacturer (typically 1 year)
- Other Technical Attributes
- Two units required per engine
What’s in the Box
- 1 x Thermostat (Replaces OEM #3831424)
Installation Notes
- Before starting, ensure the engine is cool and disconnect the battery.
- Drain a sufficient amount of coolant from the system to bring the level below the thermostat housing.
- Locate and unbolt the thermostat housing cover. Note the orientation of the old thermostat before removal.
- Remove the old thermostat(s) and clean any gasket residue from the housing and cover surfaces.
- Install the new thermostat(s), ensuring it is seated correctly. Most compatible engines require two thermostats.
- Install a new gasket (sold separately) and re-attach the housing cover, tightening bolts to the manufacturer's specified torque.
- Refill the cooling system with the appropriate coolant, then start the engine and check for leaks.
- Monitor the engine temperature to ensure it stabilizes at the correct operating range.
Troubleshooting & FAQ
How do I confirm this thermostat fits my engine?
This thermostat fits a wide range of Volvo Penta engines in the 31, 32, 41, 42, 43, and 44 series. Please refer to the "Engine & Model Compatibility" table on this page and cross-reference your specific engine model (e.g., KAD42A, AD31B) to ensure a match.
Why does the listing say two units are required?
Many Volvo Penta engines in these series use a dual-thermostat design for optimal temperature regulation. This package contains one thermostat. If your engine requires two, you will need to purchase two units. Always consult your engine's service manual to confirm the required quantity.
What are common signs of a failing thermostat?
Symptoms of a faulty thermostat include engine overheating (if stuck closed), the engine not reaching operating temperature (if stuck open), erratic temperature gauge readings, or visible coolant leaks around the thermostat housing.
Is a gasket included with this thermostat?
This kit includes the thermostat only. Gaskets are sold separately. It is highly recommended to use a new gasket during installation to ensure a proper seal and prevent leaks.
What is the specified opening temperature?
This thermostat is rated to open at 82°C (179.6°F), matching the OEM specification for the listed engine models to ensure correct engine operating temperature.
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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