The purpose of thecoolant is to control fluid temperatures and the various parts of the engine in all weather conditions. It also lubricates moving parts it comes into contact with, protecting water pump, head gasket, cylinder and piston timing from damage.
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Engine coolant is a liquid mixture of water and antifreeze. found in the radiator of a vehicle.
When your car fhigh coolant, your engine will definitely overheat and the temperature will rise when it is in operation. This can cause an explosion, cause your vehicle to stop in the middle of the road while in traffic, and at the same time, affect car components.
You should always keep the coolant at its recommended level and perform maintenance services on the cooling system to prevent failures or the liquid from boiling in the tank.
Why is my coolant boiling in the reservoir?
It is an abnormal situation when the coolant boils during the driving process. Your car’s coolants will begin to boil or appear to bubble when the engine temperature rises above the boiling point level.
It can be said that all the reasons for engine overheating can also lead to coolant boiling.
1.- Damaged head gasket
A head gasket plays a vital role in sealing your engine’s combustion chamber so the car can perform compression to maintain engine power and prevent harmful combustion emissions. However, the most important function is to prevent coolant from leaking anywhere else.
A failed head gasket will cause the engine to run in extreme conditions with overheating because at that point this allows the engine coolant, gas and oil to mix. And when the temperature in the engine reaches a boiling point, it will boil the coolant in the reservoir.
2.- Bad fan
Your coolant in the reservoir starts to boil because the fan doesn’t provide enough air circulation when your car stops.
If your cooling fan breaks, it will cause the coolant in the reservoir to start boiling because the fan is not providing enough air circulation when your car is stopped. Whatever the configuration of the cooling fan, its primary purpose is to cool the coolant. If it somehow fails, your coolant may be boiling.
3.- Defective thermostat
Valves sticking in the closed position may be the reason for this situation. As a result, the coolant will not be able to flow or boil.
The function of a thermostat is to open and close at the correct intervals to regulate the inflow and outflow of coolant from the radiator. When this part is not working properly, it will not open at the right time and will cause the cooling system to overheat.
4.- Faulty radiator cap
The radiator cap is often overlooked as part of maintenance, but is considered an essential part of the cooling system. A radiator cap is basically a blow off valve, when the coolant reaches a high temperature the blow off valve opens and ensures that the cooling system is kept under pressure.
When this cap is stuck, it doesn’t have the ability to hold enough pressure to lower the boiling point of the coolant, leading to inadequate heat absorption from your engine. This will cause the coolant in the reservoir to boil.
5.- The water pump does not work
If your car’s water pump is not working properly, it will cause your engine temperature to reach an unsafe level. This is usually indicated by a high engine temperature or an engine temperature warning light on the dash. At this time, the coolant heats up, boils and emits white smoke, as well as increasing the heat of the entire car.