3842015 Thermostat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta thermostat rated at 90 °C, from the Cooling System group, weighing 0.113 kg and listed for 12 applications on D series engines. The 90 °C opening temperature is the ordering detail that matters, and o-ring 3842016 shares the same 12 applications, so fit the two together.

🚤 Compatibility

Typically suits:

• Volvo Penta D2-40
• Volvo Penta D2-40B
• Volvo Penta D2-40F
• Volvo Penta D1-30
• Volvo Penta D1-30B
• Volvo Penta D1-30F
• Volvo Penta D1-13
• Volvo Penta D1-13B
• Volvo Penta D1-13F
• Volvo Penta D1-20
• Volvo Penta D1-20B
• Volvo Penta D1-20F

• Engine Family: D
• HP Range: 13-40 HP

⚙️ Key Features

• Rated at 90 °C
• 0.113 kg
• 12 applications on D series engines
• O-ring 3842016 covers the same 12 applications

🔌 Function

Regulates coolant flow to hold the engine at its designed running temperature, staying shut until 90 °C so the engine warms quickly, then opening to admit cooling flow.

⚠️ Common Signs of Failure

• Engine overheating, or running hot only under load
• Engine never reaching normal temperature and running cold
• Temperature gauge swinging up and down instead of settling
• Thermostat stuck open or shut, or corroded and furred when removed
• Heater or calorifier output poor because the engine is not warming through

🛠️ Service Notes

• Fit a new o-ring or gasket with the thermostat every time, and 3842016 is the matching o-ring here
• Fit the thermostat the right way round with any bleed hole positioned as specified, then bleed the system properly
• If the old thermostat is heavily scaled, flush the circuit before fitting the new one

🔄 Supersession & Cross Reference

Aftermarket / Verified Equivalents

• Recmar: RM3842015

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging