44
Maintenance and Service
COOLING SYSTEM
General Coolant Information
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.
DO NOT raise the engine hood if you see or hear steam or coolant
escaping from the engine compartment. Wait until steam or coolant
cannot be seen or heard before raising the hood.
DO NOT remove the coolant fill cap if the coolant in the surge tank is
boiling. Also, DO NOT remove the cap while the engine and radiator are
still hot. Scalding fluid and steam may be blown out under pressure if the
cap is taken off too soon and can cause personal injury.
Coolant may be combustible. Coolant leaked or spilled onto hot surfaces
or electrical components can cause a fire. Clean up coolant spills
immediately.
Volvo Trucks North America does not recommend using plain water in the
cooling system. Water alone is corrosive at engine operating temperatures and
does not provide adequate boiling protection. The engine may develop
corrosion and cavitation problems in the engine and radiator, and the boiling
point of the coolant is lowered compared to a proper antifreeze and water
mixture. Failure to follow Volvo Truck North America's cooling system care/
maintenance recommendations can render the warranty invalid.
The main purpose of coolant is to transport heat from the hot parts of the
engine to the radiator and to protect the cooling system from corrosion.
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