Volvo Penta Thermostat Kit 3831424

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 overcoolingtwo 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 Pentas 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 160F170F (71C77C) depending on system
• Construction:
  • Brass / stainless steel thermostat assembly
  • Marine-grade rubber sealing components
• Operation: Wax-element thermostat with spring-controlled valve

Whats 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 balanceif temps arent stable, replacing the thermostat + seal together is the correct fix every time