Thermostat Kit 160°F (71.1°C) – Fits Volvo Penta 3.0L Engines (Replaces 3853799)
Thermostat Kit 160°F (71.1°C) – Fits Volvo Penta 3.0L Engines (Replaces 3853799) 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 Kit 160°F (71.1°C) – Fits Volvo Penta 3.0L Engines (Repl...
Product Details
This is a Thermostat Kit 160°F (71.1°C) – Fits Volvo Penta 3.0L Engines, specifically designed for GM/Chevy 4-cylinder models from 1980 and newer. It covers a wide range of series, including 3.0GS, 3.0GL, 3.0GSM, 3.0GSP, 3.0GLM, and 3.0GLP.
This kit serves as a direct replacement for Volvo Penta 3853799, Sierra 18-3621, GLM 13070, and OMC 3853799, providing a reliable interchange solution.
- Designed for simple, direct replacement installation.
- Intended for raw-water cooled engine applications.
- The kit includes the thermostat, housing gasket, and O-ring.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3853799 / 3853799-9 |
| Sierra | 18-3621 |
| GLM | 13070 |
| OMC | 3853799 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Designed for various Volvo Penta 3.0L series models from 1980 onward, including GL, GS, and GSP variants.
Fits 4-cylinder GM/Chevy engines from 1980 and newer used in OMC applications.
| Brand | Model | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Volvo Penta | 3.0-BY | 4-Stroke | 1980+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0-EF | 4-Stroke | 1980+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0-LK | 4-Stroke | 1980+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0-WT | 4-Stroke | 1980+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GL, 3.0GL-MD | 4-Stroke | 1980+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GLM-A, 3.0GLM-B, 3.0GLM-C, 3.0GLMMDA | 4-Stroke | 1996–2000 | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GLP-A, 3.0GLP-B, 3.0GLP-C, 3.0GLP-D | 4-Stroke | 1996–2000 | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GLP-E, 3.0GLP-J, 3.0GLP-N | 4-Stroke | 1996–2000 | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GS, 3.0GS-HU, 3.0GS-MD, 3.0GS-NC | 4-Stroke | 1980+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GSM-A, 3.0GSM-B, 3.0GSM-C | 4-Stroke | 1996–2000 | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GSMBY, 3.0GSMEFS, 3.0GSMHUB | 4-Stroke | 2000+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GSMLKD, 3.0GSMNCA, 3.0GSMNCS | 4-Stroke | 2000+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GSMWTR, 3.0GSMWTS | 4-Stroke | 2000+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GSP-A, 3.0GSP-B, 3.0GSP-C | 4-Stroke | 1996–2000 | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GSPBY, 3.0GSPEFS, 3.0GSPHUB | 4-Stroke | 2000+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GSPLKD, 3.0GSPMDA, 3.0GSPNCA | 4-Stroke | 2000+ | 3853799 | Raw-water cooled |
| Volvo Penta | 3.0GSPNCS, 3.0GSPWTR, 3.0GSPWTS | 4-Stroke | 2000+ | 3853799 | Raw-water cooled |
| OMC | 4-cylinder GM/Chevy engines | 4-Stroke | 1980+ | 3853799 | Raw-water cooled |
Technical Specs
- Product Type
- Marine Engine Thermostat Kit
- Installation
- Direct replacement
- Temperature Rating
- 71.1°C (160°F)
- Housing Material
- Metal
- Dimensions
- 13.0 cm × 13.0 cm × 13.0 cm (5.1" × 5.1" × 5.1")
- Weight
- 0.1 kg (0.22 lb)
- Application
- Raw-water cooled GM/Chevy 4-cylinder engines
What’s in the Box
- 1 x Thermostat (3853799)
- 1 x Thermostat Housing Gasket
- 1 x O-Ring
Installation Notes
- Ensure the engine is cool and disconnect the battery negative terminal for safety.
- Drain the engine coolant to a level below the thermostat housing.
- Loosen the clamps and remove the hoses connected to the thermostat housing.
- Unscrew the bolts holding the housing cover and carefully remove it.
- Take out the old thermostat and remove any remnants of the old gasket and O-ring.
- Thoroughly clean both the housing and cover mating surfaces.
- Place the new thermostat into the housing, ensuring correct orientation.
- Position the new gasket and O-ring correctly.
- Re-install the housing cover, tighten the bolts to the manufacturer's specified torque, and reconnect the hoses.
- Refill the cooling system with the appropriate coolant.
- Reconnect the battery, start the engine, and check for any leaks as it warms up to operating temperature.
Troubleshooting & FAQ
How do I know if this thermostat kit fits my engine?
This kit is specifically made for raw-water cooled Volvo Penta and OMC 3.0L GM/Chevy 4-cylinder engines from 1980 and newer. The most reliable method is to confirm your engine model is listed in the compatibility table and that your existing part number matches one of the cross-references, such as Volvo Penta 3853799.
What are the signs of a failing thermostat?
Common symptoms of a bad thermostat include engine overheating (stuck closed), the engine not reaching operating temperature (stuck open), erratic temperature gauge readings, and coolant leaks from the housing area.
What is the correct operating temperature for this thermostat?
This is a 160°F (71.1°C) thermostat. It is designed to regulate your engine's temperature around this point, which is standard for many raw-water cooled marine engines.
How often should a marine thermostat be replaced?
As a preventative maintenance measure, it is advisable to inspect your thermostat annually and consider replacing it every 3-5 years, or sooner if you operate in harsh saltwater conditions. Corrosion can cause it to fail without warning.
Can I install this thermostat myself?
Yes, replacing a thermostat is a common task for those with basic mechanical skills. It is a direct-fit part. However, if you are not comfortable with the process, we recommend professional installation to prevent leaks or improper function.
My engine still overheats after replacing the thermostat. What else could it be?
If overheating persists, other cooling system components could be at fault. Check for a worn raw water pump impeller, clogged intake or hoses, a blocked heat exchanger or risers, or an incorrect engine timing.
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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