Thermostat Kit with Gasket for Volvo Penta 4.3L, 5.0L and 5.7L Stern-Drive Engines – 150°F (66°C) – Replaces 3587597, 3852111 and 3852071
Thermostat Kit with Gasket for Volvo Penta 4.3L, 5.0L and 5.7L Stern-Drive Engines – 150°F (66°C) – Replaces 3587597, 3852111 and 3852071 is backordered and will ship as soon as it is back in stock.
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Thermostat Kit with Gasket for Volvo Penta 4.3L, 5.0L and 5.7L Ster...
Thermostat Kit with Gasket for Volvo Penta 4.3L, 5.0L and 5.7L Stern-Drive Engines – 150°F (66°C) – Replaces 3587597, 3852111 and 3852071 is backordered and will ship as soon as it is back in stock.
Product Details
This 150°F (66°C) thermostat kit with gasket is an aftermarket replacement for specified Volvo Penta gasoline stern-drive applications. It is listed for Volvo Penta 4.3L, 5.0L and 5.7L engines, including the model and year ranges shown below. The kit is intended to restore proper engine temperature control during routine cooling-system service.
The thermostat is associated with Volvo Penta/OEM reference numbers 3587597, 3852111 and 3852071. Aftermarket cross-references include Sierra 18-3615 and 18-3618. Confirm the exact engine model, year and cooling-system configuration before ordering.
- 150°F (66°C) temperature rating.
- Thermostat kit for Volvo Penta stern-drive gasoline engines.
- Designed for service replacement of the thermostat and related sealing components.
- Aftermarket replacement; not an original Volvo Penta component.
Part Number Matrix
The following numbers are reference identifiers for product selection. They should be matched with the engine model and cooling-system details, not used independently of fitment information.
| Brand | Reference Number | Reference Type |
|---|---|---|
| Volvo Penta | 3587597 | OEM reference |
| Volvo Penta | 3852111 | OEM reference for thermostat housing-to-intake-manifold gasket |
| Volvo Penta | 3852071 | OEM reference for O-ring |
| Sierra | 18-3615 | Aftermarket cross-reference; 150°F raw-water thermostat |
| Sierra | 18-3618 | Aftermarket cross-reference; 150°F raw-water thermostat kit |
Engine & Model Compatibility
Company fitment data identifies the following Volvo Penta gasoline stern-drive applications. Keep the model family, year range and engine size together when checking compatibility.
| Brand | Engine / Model | Engine Size | Years | Stroke | OEM Reference |
|---|---|---|---|---|---|
| Volvo Penta | All 4.3 models, suffixes C, D, E, F and G | 4.3L | 2002–Current | 4-Stroke gasoline | 3587597 |
| Volvo Penta | All 5.0 models, suffixes C, D, E, F, G, H and K | 5.0L | 2002–Current | 4-Stroke gasoline | 3587597 |
| Volvo Penta | 5.7 OSi/OSXi, suffixes B and C | 5.7L | 2001–2003 | 4-Stroke gasoline | 3587597 |
| Volvo Penta | All 5.7 models, suffixes D, E, F, G, H, J and K | 5.7L | 2002–Current | 4-Stroke gasoline | 3587597 |
Important: The company fitment record does not identify this product for 3.0L or 8.1L engines. Those applications have therefore been removed from this listing. Always compare the existing thermostat, housing and gasket arrangement with the replacement before installation.
Technical Specifications
- Product Type
- Thermostat kit with gasket and related sealing components
- Application
- Volvo Penta gasoline stern-drive engines
- Engine Sizes
- 4.3L, 5.0L and 5.7L
- Temperature Rating
- 150°F (66°C)
- Cooling-System Reference
- Raw-water thermostat application; verify the cooling configuration before purchase
- Installation
- Replacement installation using the original housing and manufacturer-specified fastener torque
- Product Status
- Aftermarket replacement, not OEM
What's in the Box
- 1 x 150°F thermostat
- 1 x thermostat housing-to-intake-manifold gasket
- 1 x O-ring
Component reference numbers associated with the kit are 3587597 for the thermostat, 3852111 for the gasket and 3852071 for the O-ring. Packaging and component markings may vary by production batch.
Installation Notes
- Allow the engine to cool completely before beginning work.
- Disconnect the battery and close the seacock or isolate the water supply where applicable.
- Drain or contain water and coolant from the thermostat housing as required by the engine's cooling-system design.
- Remove the thermostat housing and carefully take out the old thermostat, gasket and O-ring.
- Clean and inspect the mating surfaces. Do not reuse damaged or flattened sealing components.
- Install the new thermostat in the same orientation as the original part, then position the gasket and O-ring correctly.
- Reinstall the housing and tighten the fasteners to the engine manufacturer's specified torque.
- Restore the water or coolant supply, reconnect the battery and run the engine while checking for leaks.
- Confirm that the temperature stabilizes normally and recheck the housing after the initial heat cycle.
Troubleshooting & FAQ
What temperature is this thermostat rated for?
The thermostat is rated at 150°F (66°C).
Which Volvo Penta engines are listed for this kit?
The company fitment data lists 4.3L engines with C–G suffixes from 2002 onward, 5.0L engines with C–H and K suffixes from 2002 onward, 5.7 OSi/OSXi B and C models from 2001–2003, and 5.7L models with D–H, J and K suffixes from 2002 onward.
Is this kit for a raw-water or freshwater cooling system?
The available catalog reference identifies the 150°F kit application as raw-water cooled. Do not assume compatibility with a closed-loop freshwater system; verify the cooling-system configuration and the original part before ordering.
Does the kit include the gasket and O-ring?
This listing is for a thermostat kit with the associated gasket and O-ring. The referenced components are the thermostat, gasket and O-ring listed above.
Is this an OEM Volvo Penta part?
No. This is an aftermarket replacement that references Volvo Penta/OEM numbers for identification and fitment comparison.
How do I confirm fitment?
Match the engine brand, engine size, exact model suffix, year and cooling-system configuration. Also compare the old thermostat and sealing arrangement with the product information before installation.
Safety & Important Information
- Work only on a cool engine and follow the engine manufacturer's service procedures.
- Use appropriate precautions when handling hot water, coolant and raw water.
- Do not rely on engine displacement alone; model suffix and year conditions must also match.
- Verify the housing, thermostat orientation and sealing surfaces before final assembly.
- Professional installation is recommended when the correct cooling-system procedure is uncertain.
About Sea Sierra
- Marine Replacement Parts — Replacement components selected for common marine service applications.
- Fitment-Focused Listings — Product references and application conditions are provided to help compare the correct part.
- Service-Ready Support — Review the engine model and cooling-system details before ordering or installing.
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