Thermostat Kit with Gasket – Fits Volvo Penta 3.0L, 4.3L, 5.0L, 5.7L, 8.1L (Replaces 3587597, 3852111, 3852071)
Thermostat Kit with Gasket – Fits Volvo Penta 3.0L, 4.3L, 5.0L, 5.7L, 8.1L (Replaces 3587597, 3852111, 3852071) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Thermostat Kit with Gasket – Fits Volvo Penta 3.0L, 4.3L, 5.0L, 5.7...
Product Details
This Thermostat Kit with Gasket is a direct-fit replacement for a wide range of Volvo Penta gasoline engines from 2002 and newer, including 3.0L, 4.3L, 5.0L, 5.7L, and 8.1L models in the GL, GXi, OSi, and Gi series. It ensures your engine maintains the correct operating temperature for optimal performance and efficiency.
It serves as a direct cross-reference for Volvo Penta parts 3587597, 3852111, and 3852071; Sierra 18-3615, 18-3618, and 18-2917; OMC 3701777; and Mercruiser 27-33179, 27-53045, 27-530451, and 27-53045B1.
- Engineered for direct OEM-replacement installation.
- Complete kit includes the thermostat, gasket, and O-ring for a full service.
- Manufactured in an ISO9002 certified facility for consistent quality.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3587597 |
| Volvo Penta | 3852111 |
| Volvo Penta | 3852071 |
| Sierra | 18-3615 |
| Sierra | 18-3618 |
| Sierra | 18-2917 |
| OMC | 3701777 |
| Mercruiser | 27-33179 |
| Mercruiser | 27-53045 |
| Mercruiser | 27-530451 |
| Mercruiser | 27-53045B1 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Volvo Penta engines, this kit fits a wide range of gasoline models from 2002 and newer, including but not limited to the GL, GXi, Gi, and OSi series.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Volvo Penta | 3.0GL, 3.0GS, 3.0GXi | 3.0L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 4.3GL-A/B/C/D/E/EF/G/GF/J/JF | 4.3L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 4.3GXi-C/CF/D/DF/E/EF/F/FF/G/GF/J/JF | 4.3L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 4.3OSi-C/CF/D/DF/E/EF/F/FF/G/GF/J/JF | 4.3L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 4.3GXiE-M | 4.3L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.0GL-A/B/C/D/E/F/FF/H/HF/J/JF | 5.0L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.0GXiC-P/C-JF/CE-P/E/EF/F/FF/G/GF/J/JF/K/KF/M/MF/N | 5.0L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.0OSi-C/CF/D/DF/E/EF/F/FF/G/GF/J/JF | 5.0L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.0GiC-J/JF, 5.0GiCE-J/JF/M/MF | 5.0L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.7GiC-300-P/J/JF, 5.7GXiC-P/J/JF | 5.7L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.7GiCE-300-P/J/JF/M/MF, 5.7GXiCE-J/JF/M/MF | 5.7L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.7GL-A/B/C/D/E | 5.7L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.7Gi-C/CF/D/DF/E/EF/F/FF/G/GF | 5.7L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.7GXi-D/DF/E/EF/F/FF/G/GF/H/HF/J/JF | 5.7L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | 5.7OSi/OSiE-300-J/JF, 5.7OSXi/OSXiE-J/JF | 5.7L | 4-Stroke | 2001–2003 | 3587597 |
| Volvo Penta | 8.1Gi, 8.1GXi | 8.1L | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | V6-200, V6-225, V6-225E | V6 | 4-Stroke | 2002 and Up | 3587597 |
| Volvo Penta | V8-225, V8-270, V8-300, V8-320, V8-380 | V8 | 4-Stroke | 2002 and Up | 3587597 |
Technical Specs
- Product Type
- Thermostat Kit with Gasket and O-ring
- Installation
- Direct OEM replacement
- Fuel Type
- Gasoline
- Operating Temperature
- Thermostat opening temp: 150°F/65.5°C
- Warranty
- Varies by retailer, typically 1-year limited warranty
- Other Technical Attributes
- ISO9002 certified manufacturing
What’s in the Box
- 1 x Thermostat (3587597)
- 1 x Gasket (3852111)
- 1 x O-Ring (3852071)
Installation Notes
- Disconnect the battery before beginning work.
- Drain the engine coolant into a suitable container.
- Locate the thermostat housing and remove the bolts or nuts securing it.
- Carefully remove the old thermostat, gasket, and O-ring.
- Thoroughly clean the mating surfaces of the housing and the engine block.
- Install the new thermostat, ensuring it is oriented correctly. Place the new gasket and O-ring in position.
- Reinstall the housing and tighten the fasteners to the manufacturer’s specified torque.
- Refill the cooling system with the appropriate coolant.
- Reconnect the battery, start the engine, and carefully check for leaks as it warms up.
Troubleshooting & FAQ
How do I know if my thermostat is failing?
Common signs of a faulty thermostat include the engine overheating, running too cool (not reaching operating temperature), erratic temperature gauge readings, and coolant leaks from the thermostat housing area.
What is the correct operating temperature for this thermostat?
This thermostat is rated to begin opening at 150°F (65.5°C), allowing coolant to circulate through the radiator to maintain the engine's designed temperature range.
Will this kit work for both raw water and freshwater cooled engines?
Yes, this thermostat kit is suitable for the specified gasoline engines in both raw water (sea water) and closed-loop (freshwater/antifreeze) cooling systems.
Is trimming the gasket or O-ring required for a proper fit?
No. This kit is designed for a direct fit. If the gasket or O-ring does not align perfectly, double-check that you have the correct part for your specific engine model and that the surfaces are clean.
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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