Frequently Asked Questions

The cooling system is a part of the engine that regulates the engine temperature and prevents engine breakdown due to overheating. The cooling system removes excess heat to keep the inside of the engine at an efficient temperature, approximately 94 °C (approximately 201 °F). All the parts that make up the cooling system have only one purpose: to ensure that the circulation of the coolant inside the engine can absorb and release heat.

Regardless of the climate, engines require a thermostat to bring it to the correct running temperature and to keep it there. Keeping the engine at the proper temperature prevents extensive engine damage. If an engine runs cold, it will produce sludge and corrosive acids that will prevent it from meeting legal emission control requirements.

The coolant is a mixture of antifreeze and water. The antifreeze lowers the freezing point and raises the boiling point. Coolant also protects the system from rust and corrosion.

When an engine is cold, the thermostat is cold. Coolant flows through the bypass hose and the water jackets to allow the engine to warm up evenly.

When the engine warms up, the radiator cap allows the expanding coolant to flow into the coolant recovery reservoir. When the engine and the coolant cool down, the coolant returns to the radiator and water jackets through the vacuum valve in the cap.
The thermostat opens when the engine warms up. This allows coolant to circulate throughout the radiator and the water jackets.
When the temperature is low, the bypass hose blocks coolant from flowing through the radiator. When the correct temperature is reached, the thermostat opens and excess heat is absorbed through the radiator.
The upper gasket prevents coolant from escaping to the outside. The lower gasket keeps pressure in the radiator. The cam lock pushes the two gaskets against the sealing surfaces when the cap is installed. The safety stop prevents the cap from being opened too quickly.
Due to the importance of the internal dimensions between the terminals, a drop or impact may cause it to go out of calibration. Replacement is recommended.
Yes. It is important that the cooling circuit be free of impurities and rust to ensure the proper working of the components and a longer lifespan.
The cap regulates internal pressure in the cooling circuit. It consists of two valves: a presser and a depressor that release excessive vapors (excessive increase of internal pressure) and prevent the hose from contracting during the cooling process (internal pressure decrease would cause a vacuum).
No. If water is added, the coolant may freeze or boil at extreme temperatures.
Direct flow is when coolant flows from the spring side of the valve. Reverse flow is when coolant flows from the flange side of the valve.
The Start to Open (STO) temperature refers to the temperature at which the thermostat valve starts to open.
When the temperature indicator on the driver console indicates low temperature, the thermostat should be checked at a service garage.
The heated pin minimizes the temperature deviations (from nominal temperature), which helps to achieve better fuel consumption and lower emissions.

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