Volvo Penta Thermostat Kit – 3831424
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The Volvo Penta 3831424 Thermostat Kit is a genuine OEM cooling system service kit engineered to deliver precise thermal regulation and long-term reliability in Volvo Penta marine engines.
This kit is designed to control coolant flow through the engine by opening and closing at a calibrated temperature, ensuring proper engine warm-up and maintaining optimal operating temperature under varying load conditions. Maintaining correct temperature is critical for combustion efficiency, fuel economy, oil lubrication performance, and internal component longevity.
The included thermostat works in conjunction with the cooling system to prevent both overheating and overcooling—two common causes of premature engine wear. The integrated sealing components ensure a proper, leak-free installation, restoring full cooling system integrity during service.
Manufactured to Volvo Penta’s strict OEM standards, this kit provides exact fitment, consistent performance, and durability in harsh marine environments including saltwater exposure.
Key Features
- Genuine Volvo Penta OEM thermostat kit
- Precision-calibrated temperature regulation
- Maintains optimal engine operating temperature range
- Prevents overheating and cold-running conditions
- Restores proper coolant flow dynamics
- Includes sealing components for leak-free installation
- Corrosion-resistant marine-grade materials
- Direct OEM fit – no modification required
Engine Compatibility
Volvo Penta Gasoline Engines (GM-Based Platforms)
Commonly used on:
- Volvo Penta 3.0L GL / GS
- Volvo Penta 4.3L GL / GI / GXI
- Volvo Penta 5.0L GL / GI / GXI
- Volvo Penta 5.7L GL / GI / GXI
Volvo Penta Sterndrive & Inboard Applications
- SX sterndrive systems
- DP-S / DP-SM / DP-E / DP-G duoprop drives
- Inboard gasoline cooling systems
➡️ Designed for use in raw water and closed cooling systems depending on configuration
Serial Number Fitment Notice
Fitment depends on:
- Engine model and variant
- Production year
- Cooling system type (raw water vs freshwater/closed loop)
⚠️ Always confirm compatibility using your engine serial number before ordering.
Specifications
- Part Number: 3831424
- Type: Thermostat kit (service kit)
- Function: Regulates engine coolant temperature
- Temperature Range: Typically 160°F–170°F (71°C–77°C) depending on system
- Construction:
- Brass / stainless steel thermostat assembly
- Marine-grade rubber sealing components
- Operation: Wax-element thermostat with spring-controlled valve
What’s Included
- Thermostat
- O-ring / gasket seal
When This Part Needs Replacement
Replace the thermostat kit if you experience:
- Engine overheating under load
- Engine running below normal operating temperature
- Slow warm-up or failure to reach temperature
- Fluctuating temperature gauge readings
- Poor fuel efficiency or incomplete combustion
- Evidence of corrosion or sticking thermostat
Installation Notes
- Always replace the seal/O-ring included in the kit
- Ensure correct thermostat orientation during install
- Clean thermostat housing and sealing surfaces thoroughly
- Inspect cooling passages for debris or scale buildup
- Torque housing bolts to manufacturer specifications
- Run engine and verify temperature stability after installation
Alternate / Superseded Part Numbers
OEM Cross References
- Volvo Penta: 3831424
- Related / superseding numbers (application dependent):
- 3853799
- 3850364
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
💡 Parts Desk Insight
On Volvo gas engines, a thermostat that sticks even slightly will throw off the entire cooling balance—if temps aren’t stable, replacing the thermostat + seal together is the correct fix every time 👍
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.