The engine temperature is rapidly increasing, the viscosity of motor oil decreases and it is no longer fully performs its lubricating function. Touching and rubbing parts of mechanisms, not getting full lubrication, work wear, wear away on their surface are formed fins and burrs.
The crankshaft does not slide, and with an effort turns on "dry" liners, pistons and mirrors of cylinders without lubrication work for the destruction of each other. If this process of annihilation of time does not interrupt, the engine simply stalls.
Causes of engine overheating
Engine overheats only in the event of a malfunction of its cooling system, where the excess heat is not discharged coolant.
The most common cause – lack or insufficient amount of coolant. Occurs due to violation of the integrity of connective
pipes and leakage of fluid through cracks or tears. Sometimes the flow of antifreeze through the radiator when damaged one or more of its cells.
Most often such accidents happen after the winter period of operation of the machine, due to fluctuations of temperature values of the motor, when during the night it cools down to subzero temperatures, and then during the drive warms up almost instantly. An additional contribution to the destruction of the connecting pipes making the aggressive saline solutions, which are generously sprinkled and watered the carriageway of a road and utilities.
When failure of the thermostat, the coolant circulates only in a small circle of the system, not getting into the radiator. To verify proper operation of this adjusting device, it is sufficient to touch the touch the bottom. If it is hot – thermostat valve in good working order and opens the coolant path to the radiator. If the engine has warmed up enough, and the bottom of the thermostat is cold, therefore it is defective. In this case, the coolant will only circulate inside the engine and soon comes to a boil.
Rarely, but crashes water pump – pump. The symptoms of failure and its consequences are the same as at idle the thermostat.
The fans, driven from the crankshaft pulley may become frayed or break the drive belt. An electric fan can also be damaged, it is not excluded breakage sensor and the relays switching on and off. In both cases the liquid passing through the honeycomb radiator, neoptolemos the flow of air will not be cooled, again over short period of time will result in boiling coolant and the engine overheating.
What to do if engine overheating has occurred
To recognize the upcoming engine overheating isn't the only temperature sensor on the dashboard. Shortly before the overheating stops supply of heat from the heater inside the car, and by sharp pressing the accelerator pedal clearly audible knocking of the pistons, not receiving the desired amount of lubrication.
Finding overheating, you pull over to the side of the roadway, do not forget turning on the turn signal to warn other traffic participants about their forced maneuver. Next, you should cut the engine, open the hood and let the engine 15-20 minutes for passive cooling.
In any case, no need to pour cold water! Extreme temperatures and the cylinder head and the cylinder block may not hold up and will crack. And do not rush to open the radiator cap! This action will not help the process of liquid cooling, but to get burned by steam from boiling antifreeze can be a fraction of a second, or losing coolant at all – it immediately "fly" out of the neck of the radiator.
If you have the knowledge and experience, try to establish the cause of engine overheating and partly to eliminate improvised means.
From a leaking radiator to get rid of, a pair of pliers pinching the leaking pipe or zakonopatit the leak with cold weld. A defective thermostat can be replaced with a new one or remove from its design the stop valve. In the case of leakage of liquid through the nozzles should try to restore the tightness by means of insulating tape or Scotch tape.
With abundant leakage of liquid from the system, you can continue the path, occasionally stopping and pouring water in the radiator instead of antifreeze escaped.
When there is a fault with the fan or the pump can continue by enabling the full capacity of the heater, while quite a large amount of heat will be transmitted into the cabin through the stove.
Renewing the motion after the engine overheating, it is necessary to closely monitor the temperature gauge of the coolant, and as soon as she enters the danger zone, you should again stop and allow it to cool. So, "small dashes" with grief in half to get to the service center, one HUNDRED, or garage, where quality and without haste, with their own hands to resolve the problem, or call a tow truck and to deliver the broken car to the service station.