Volvo Penta Thermostat Kit – 3831426
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You have 30 days to request a return. All sale items are final sale.
The Volvo Penta 3831426 Thermostat Kit is a genuine OEM cooling system service kit designed to regulate engine temperature and maintain optimal performance in Volvo Penta marine engines.
This complete kit includes the thermostat and sealing components required for proper installation, ensuring consistent coolant flow and accurate thermal regulation. By maintaining correct engine operating temperature, it helps prevent overheating, improves fuel efficiency, and extends engine life in demanding marine environments.
Built to Volvo Penta’s exact specifications, this kit delivers reliable, long-lasting performance across a wide range of gasoline sterndrive and inboard engines.
Key Features
- Genuine Volvo Penta OEM kit
- Complete thermostat and sealing solution
- Maintains precise engine operating temperature
- Prevents overheating and cold running conditions
- Ensures consistent cooling system performance
- Corrosion-resistant marine-grade construction
Engine Compatibility
Volvo Penta Gasoline Engines
Commonly used on:
- Volvo Penta 3.0L engines
- Volvo Penta 4.3L V6 engines
- Volvo Penta 5.0L V8 engines
- Volvo Penta 5.7L V8 engines
Volvo Penta Sterndrive Applications
- SX drives
- DP-S / DP-SM drives
- DP-E / DP-G drives
➡️ Fits a wide range of GM-based Volvo Penta gasoline marine engines
Serial Number Fitment Notice
Fitment depends on:
- Engine model and production year
- Cooling system configuration (raw water vs closed cooling)
⚠️ Always confirm compatibility using your engine serial number before ordering.
Specifications
- Part Number: 3831426
- Type: Thermostat kit
- Function: Regulates coolant temperature
- Temperature Rating: Typically ~160°F–170°F (71°C–77°C) depending on application
- Construction: Marine-grade metal thermostat with rubber sealing components
What’s Included
- Thermostat
- O-ring / gasket seal
When This Part Needs Replacement
Replace the thermostat kit if you notice:
- Engine overheating
- Engine running below normal operating temperature
- Fluctuating or unstable temperature readings
- Poor fuel efficiency or rough running
Installation Notes
- Always replace included seal/O-ring during installation
- Ensure correct thermostat orientation
- Clean and inspect housing before install
- Verify cooling system operation after installation
Alternate / Superseded Part Numbers
OEM Cross References
- Volvo Penta: 3831426
- Replaces / supersedes: 3850364 / 3853799 (application dependent)
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
💡 Parts Desk Insight
On Volvo gas engines, thermostats tend to fail open first—if your engine won’t reach temp, this kit is usually the fix 👍
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.