It may be that the carbon brush inside the starter motor is faulty, the gap between the hydraulic pressure inside the engine cylinder head and the valve is too large, the screws of the lower engine guard plate are loose, etc.
The specific reasons why Great Wall Fengjun 5 beeps after starting in winter are as follows: 1. The carbon brush inside the starter motor is faulty. The working principle of the starter motor is that after power is applied, the electromagnet works to combine the gear of the starter motor with the flywheel of the engine. After the engine is started, the gear will quickly return to its original position. If the gear of the starter motor does not return quickly, it will become geared with the flywheel. It emits and then beeps abnormally.
2. The gap between the hydraulic pressure inside the engine cylinder head and the valve is too large. Because the vehicle has many kilometers and has been used for a long time, the engine valves and hydraulic pressure will wear out to a certain extent. If the gap is too large, abnormal noise will occur.
3. The screws of the engine lower guard plate are loose. When the engine guard plate screws are loose, there will also be an abnormal sound when starting.