volvo — Volvo Operator Manual (EN)

Cooling System 39 W2004361 1. To Transmission Cooler 2. EGR Cooler 3. Thermostat Housing 4 Expansion or Surge Tank 5. Coolant Cap 6. Level Sensor 7. Radiator 8. Coolant Filter 9. Coolant Pump A well functioning and maintained cooling system is as important to the engine as performing regular oil changes or using good fuel. To get the best result it is very important to use quality products and to service the system at the right intervals. Please read this section carefully. DANGER Coolant is toxic; risk of poisoning. DO NOT drink coolant. Use proper hand protection when handling. Keep coolant out of reach of children and animals.

Failure to follow these precautions can cause serious illness or death. The cooling system consists of a liquid that is pumped by a gear driven coolant pump that keeps the flow through the engine to the radiator. The radiator gives off heat to the air as it passes through and air flow is helped by the engine fan. For a quick warm-up of the engine, a thermostat regulates the flow of coolant. CAUTION Never add coolant to a hot or overheated engine. Engine damage can result. Allow the engine to cool first.