22820756 Thermostat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta thermostat weighing 0.390 kg, superseding part number 21412642 and covering its four TWD series applications. It is within 14 grams of the 86-degree thermostat 22820752, so weight cannot separate them - check the rating.

⚙️ Key Features

• Thermostat from the Cooling System group
• 0.390 kg
• Supersedes part number 21412642
• Covers the four TWD series applications listed against the superseded number
• Within 14 grams of the 86 degree thermostat 22820752, so weight cannot separate the two

🔌 Function

Regulates coolant flow to the heat exchanger, staying shut until the engine reaches operating temperature and then metering flow to hold that temperature under changing load.

⚠️ Common Signs of Failure

• Long warm-up and a gauge that never reaches its normal mark
• Rapid overheating with the outlet hose still cold, indicating the valve has jammed shut
• Temperature hunting up and down under steady throttle
• Valve face and seat scaled or pitted so the unit leaks past when closed
• Capsule or spring found collapsed when the housing is opened

🛠️ Service Notes

• Confirm the rating stamped on the unit you are replacing, since thermostats of the same size differ only by opening temperature
• Renew the gasket or sealing ring and inspect the housing sealing face before refitting

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 22820756 → Supersedes 21412642 → Supersedes 21237215

OEM / Related Numbers

• 21412642 earlier number superseded by this part

Other-Brand OEM Numbers

• Mahle: THD 3 76

Aftermarket / Verified Equivalents

• Calorstat by Vernet: THS18201.76
• Calorstat by Vernet: THCT18201.76
• DT Spare Parts: 2.15640
• Febi Bilstein: 40673
• NRF: 725438
• Auger: 91254
• Sampa: 036.056

📦 Condition

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