The following figure shows the layout for the flow of engine coolant liquid. When the temperature is below 88 ± 2°C the thermostat is closed and the liquid does not travel through the radiator.
1. Heater unit2. Water pump3. Expansion tank4. Air bleed screw on radiator5. Radiator6. Thermostat7. Air bleed screw on return hose from passenger compartment interior heater
