21148403 Thermostat | Genuine Volvo Penta Part

🔧 Product Description

Thermostat rated at 143 degrees Fahrenheit, 62 degrees Celsius, listed in the maintenance parts schedule as the thermostat for the injected 3.0GXi-J and 3.0GXiC-J. It weighs 0.043 kg. The carburetted 3.0GLP-C, D, E and J take thermostat 3853799 instead, while the thermostat O-ring, 3856537, is the same on both.

🚤 Compatibility

Typically suits:

• Volvo Penta 3.0GXiC-J
• Volvo Penta 3.0GXi-J

• HP Range: Approximately 150 HP

⚙️ Key Features

• Thermostat for the 3.0GXi-J and 3.0GXiC-J
• Rated 143 degrees Fahrenheit, 62 degrees Celsius
• 0.043 kg
• 3853799 is the thermostat for the 3.0GLP-C, D, E and J
• O-ring 3856537 is common to both 3.0-litre thermostats
• Genuine Volvo Penta Part, designed and manufactured to ensure original fit, safety and performance
• Role: Thermostat
• Fits: 3.0GXi-J, 3.0GXiC-J

🔌 Function

Controls coolant circulation so the engine reaches and maintains the specified operating temperature.

⚠️ Common Signs of Failure

• Engine runs too hot or too cold
• Slow warm-up or unstable temperature indication
• Thermostat stuck open, closed or partially open
• Poor heater output where a cabin-heater circuit is fitted
• Coolant leakage around the housing or sealing ring

🛠️ Service Notes

• Install with O-ring 3856537 and the correct housing orientation
• The two 3.0-litre thermostats are not interchangeable, so check whether the engine is the carburetted GLP or the injected GXi
• Always refer to the operator's manual for the recommended maintenance and service intervals for your engine and drive

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21148860 - associated thermostat housing

Aftermarket / Verified Equivalents

• Sierra: 18-3557
• GLM: 13080
• Recmar: REC396987

📦 Condition

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