Causes of sudden overheating of the engine and handling When the car is running normally, the cooling system is always good. If the engine suddenly becomes overheated, there are several possible causes: 1. The cooling system leaks severely, causing insufficient cooling and overheating. In this regard, the driver can directly observe and can rule out the year. 2. The shaft and impeller of the water pump are loose and the cooling water circulation is interrupted and overheated. A simple and practical touch method can be used to judge: the engine temperature is high, and the radiator temperature is low. In this regard, the water pump should be overhauled or replaced. 3, the water pump belt is too loose (such as the engine fixed bracket broken, loose bolts, etc.) or broken and overheating. In this regard, careful observation of the driver by observing the current meter, if the ammeter indicates discharge (3-5A), but also the phenomenon of overheating can be confirmed. 4. The thermostat suddenly fails. One is that due to aging, corrosion, etc., the thermostat causes leakage of the swelling (wine, wax) and causes the main valve to close; second, the thermostat's main valve comes off and gets stuck in the narrow part of the radiator inlet pipe. Both of these phenomena can block the radiator's large circulation and cause the engine to overheat. Thermostat damage should be replaced. 5, fan failure. For an engine equipped with an electronically controlled fan or an electromagnetic clutch fan, malfunctions such as temperature-controlled switches, relays, and lines cause the fan to malfunction or malfunction, resulting in sudden overheating of the engine. In this regard, the circuit and components should be overhauled. In addition, overheating of the engine can also be caused by excessive scale in the cooling system, clogged water tanks, improper ignition, a heavy load on the vehicle, and long-term operation. However, this kind of overheating is generally not too abrupt, and usually the temperature is too high. Once the engine overheats, it should be calm, rapid and do three preventions: 1. Prevent the piston from sticking. When there is overheating during driving, the engine should be stopped immediately to allow the engine to run idly, causing the water temperature to drop. If the engine has self-extinguished, turn off the ignition switch and use the handle to crank the crankshaft. If there is no handle, the starter can be used intermittently several times to move the piston up and down to prevent the piston from standing still after the piston is still. 2, to prevent burns. In the event of overheating, opening the radiator cover as soon as possible, excreting steam and reducing the temperature is extremely beneficial to the protection of the engine. However, if you open the lid immediately, a lot of steam pressure may burn people. At this point, the hood should be opened. If this condition is not available, use a towel, a cloth or the like (preferably cold and not soaked) to cover the tank lid and turn the lid open while pressing down. Care should be taken to prevent the steam from escaping the operator's wrist and face. 3, to prevent the cylinder block, cylinder head cracks. When the radiator cover is opened, some drivers quickly add cooling water to cool down. This may cause the cylinder block and cylinder head to crack due to rapid cooling after overheating. The correct approach is: Let the engine idle, slowly add cooling water. This will generally not damage the engine. If conditions permit, adding warm water is best.
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