【Knowledge of family car for car owners】When driving home during the Spring Festival, it is inevitable to wait for a long time at idle in traffic jams. This is the problem of poor engine heat dissipation. So how should we solve it? Let us understand the causes and solutions of poor engine heat dissipation.
The crux of the matter:
1.In the case of poor traffic - traffic jam or long-time idling, the engine water temperature gauge shows too high, the electronic fan high-speed gear works for too long, the engine noise increases, and the fault is most obvious when the temperature is too high and the air conditioner is turned on.
2.When the temperature is too high and the air conditioner is turned on, the idle speed is unstable and the rotation speed is too large, the acceleration is weak, and the engine has abnormal noise.
3.After the hot car is turned off for ten minutes, it is not easy to start the car when it is started; sometimes it will automatically turn off when the hot car is running.
4.When the car is cold, the cooling temperature of the air conditioner is very cold, and the cooling effect of the air conditioner is not obvious when the car is warm; and there is a large resonance buzzing sound in the air conditioning system.
5.When the hot car is idling, the air conditioner compressor clutch is frequently sucked off, or even disconnected, causing the hot car air conditioner not to cool.
prescription:Prescribe the right medicine for full recovery.
1.Check whether there is too much dust between the condenser and the water tank, and thoroughly clean it with high-pressure air to ensure that the water tank and the condenser have good heat dissipation performance. Warm reminder: usually pay attention to wipe the dust between the condenser and the water tank.
2.When the car is hot, check the temperature difference between the upper and lower water pipes of the water tank. If the temperature difference is too large, you need to check the opening of the thermostat and whether the water pump has a fault that the speed is lost. Warm reminder: The temperature difference between the upper and lower water pipes of the water tank should not be too large.
3.After the car is warmed up, check the water return condition of the return pipe at the upper end of the antifreeze storage tank. If the return water is not smooth or blocked, the water temperature will be too high. Warm reminder: Do not blindly disassemble and replace parts during maintenance.
4.Due to the irregular addition and replacement of antifreeze, the engine water channel and water tank will be blocked in advance, and the water temperature will be high. Antifreeze is replaced every two years, and original parts must be used when replacing and adding. Warm reminder: After water is added to the engine cooling system, or the concentration of antifreeze added exceeds 60%, the water temperature will be too high. 5. The high pressure at the high-pressure end of the air-conditioning system is too high; the air-conditioning refrigerant or air-conditioning refrigeration lubricating oil is overfilled; the self-adjusting function of the internal self-tuning air-conditioning compressor fails, resulting in excessive high pressure; and the air-conditioning condenser is blocked. The above faults will increase the load of the engine, consume the heat dissipation performance of the cooling system, and lead to the occurrence of faults with excessive water temperature.
Warm reminder: Too little or too much refrigerant in the air conditioner will reduce the cooling effect.
Expert advice:5 Warning Signs to Identify the Patient When you drive your car to a repair shop and describe a decline or problem with the car to the mechanic, pay attention to the noise and symptoms associated with it. It can be said that the more you know about the car, the better you can describe the car's failure and help the repairman make the correct diagnosis, so as to prescribe the right medicine.
1.New or unusual noises are often indicative of a car malfunction. For example, a low humming sound could be a faulty bearing, or it could just be a tire problem; a squealing sound could indicate brake pads needing to be replaced, or a loose belt. When describing the fault, it is best to clearly state the cause or action that caused the noise.
2.In addition to the loss of performance or noise, the indicator signal on the dashboard is another area that cannot be ignored. Carefully read the car's owner's manual to understand the meaning of various signal lights, which can help you find new faults in time.
3.If you feel that the steering wheel is tight, the car is skewed to one side, or there is abnormal vibration within a certain speed range, you need to check the tires, or perform wheel balance and positioning. Timely maintenance when these problems are just discovered can prevent the continued expansion of the fault and avoid greater losses.
4.Special attention should be paid to the braking system, because the braking system has a very close relationship with driving safety, and ignoring such failures is tantamount to risking personal and other people's lives.
5.Pay attention to whether the car starts smoothly. If the car starts to become difficult to start, it is best to drive to the repair shop in time for maintenance.
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