Leaving a car engine can overheat and what steps need to be taken in this case. During the combustion of the fuel/air mixture in the engine cylinders is allocated a large amount of heat that escapes from the exhaust gases and the other part is transferred to the metal parts of the engine (engine block, head of unit, etc.). Actually, the purpose of the cooling system just give this heat into the environment Wednesday, as well as to keep the temperature of the engine at a particular level (for most DVS is 90-100° c). When the protagonist of the cooling system-coolant (antifreeze, water), which circulates on the motor, takes on heat and release it into the environment Wednesday through the radiator.
Cooling system malfunction
1. Air-tightness
To avoid boiling coolant system specifically supported the pressure slightly above atmospheric pressure. Controls the special valve. If it is defective or the system does not leak (radiator flows or damaged connections), then the antifreeze will simmer, even if liquid temperature does not exceed the operating temperature of the engine.
2. Thermostat
Another cause of overheating could be a faulty thermostat (thermostat liquid in the cooling system of the engine). It is necessary to restrict the flow of coolant to the radiator to avoid excessive cooling (read-fall working temperature ice). As a rule, if the thermostat fails, it gets jammed in the closed position, allowing the coolant to reach the radiator and cool (to convey heat from the engine into the atmosphere).
3. Cooling radiator
Single word deserves a cooling radiator, which is required for the immediate transfer of heat from the antifreeze into the environment Wednesday. To heat exchanger has handled this task through it must be sufficient air flow. So, if the honeycomb radiator clogged with mud, the air passes through them with difficulty and cooling are not effective. That is why after the winter cooling radiator is recommended to thoroughly rinse.
Also in this paragraph, you can add this element as the radiator fan. It automatically turns on, creating an additional air flow to the heat exchanger (for example, when the machine is standing in a traffic jam and velocities are simply insufficient to dissipate heat from the radiator). If the fan does not turn on at the right moment, the radiator cannot effectively cool the coolant and engine temperature begins to rise.
4. Water pump
If you delve, the culprit may be overheating and the coolant pump (pump), which provides the forced circulation antifreeze to the cooling system. If the pump for any reason fails, fluid circulation stops, and it simply does not reach the heatsink.
If you found that coolant temperature climbed upwards, and under-the-hood fells pairs, then you need to stand up as soon as possible in a safe place on the roadside, stifle the combustion engine and, if possible, include parking heater at full power (this will take part the heat from the engine to the radiator stoves and help cool the engine). When this air conditioner must be off.
Next, look at whether the radiator fan, check the coolant level in the system (on a broad tank marked with the minimum and maximum marks), as well as inspect the heatsink for damage. If everything is OK, then you need to understand whether the antifreeze circulation on paths (whether the thermostat and whether its pumps pump). This can be easily verified by touching the ball to the upper fitting heatsink-it must be hot. If, again, everything is in order, it remains only to contact autotechnical Center for more detailed Diagnostics.
It is important! If you decide to add the speczhidkost to the cooling system, remember: never open the cap of the expansion tank immediately after stopping the car with an overheated engine. If you do this, the pressure in the system is sharply reducing atmospheric pressure, resulting in a zakipaniju fluid and its release to the outside. Anyone need not Burns, right? Moreover, fresh antifreeze you can fill only after the motor has cooled down (40-60 minute stand up open the hood). Otherwise, in the block and cylinder head from the temperature difference cracks appear.
