What does engine large and small circulation mean?

1 Answers
CamillaMarie
07/29/25 5:45pm
"Large and Small Circulation": The thermostat can direct the coolant through three circulation paths: small circulation, large circulation, and mixed circulation. Below is the relevant introduction: 1. Large Circulation: The water in the radiator and the water in the engine circulate together. Water pump → distribution pipe → cylinder block water jacket → cylinder head water jacket → thermostat → radiator inlet hose → radiator → radiator outlet hose → water pump. 2. Small Circulation: The water in the engine circulates through the water pump, while the water in the radiator does not circulate. Water pump → distribution pipe → cylinder block water pipe → cylinder head water pipe → thermostat → bypass pipe → water pump.
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