The solution to the abnormal noise of the starting motor is as follows:
1. If there is an abnormal sound when it is started instantly, there will be no abnormal sound at idle speed after the engine is started. The fault point is likely to be a faulty carbon brush inside the starter motor. The working principle of the starter motor is that the electromagnet works after the power is turned on, and the gear of the starter motor and the flywheel of the engine are combined and rotated at the same time, and the engine can be started at this time, and the gear will quickly return after the engine is started. This fault is because the gear of the starter motor does not return quickly, resulting in abnormal noise from the flywheel, so it is necessary to check the starter motor;
2. To reduce the probability of this failure, when you can turn the ignition key to start the vehicle, do not turn the key for more than 5 seconds. After turning the key, let go quickly and let the ignition key return automatically;
3. If there is abnormal noise at idle speed after the engine is started, this fault point is likely to be caused by the hydraulic pressure inside the engine cylinder head and the valve clearance being too large. Because the vehicle has more kilometers and has been used for a long time, the engine valves and hydraulic pressure will be worn to a certain extent. When the gap is too large, there will be a "da-da-da" abnormal sound. To solve this fault, it is necessary to disassemble the cylinder head to replace these two parts;
4. The way to slow down this failure is to change the oil regularly. Do not overuse oil, because overuse of oil will make the lubricating effect of oil worse, and will accelerate the wear of valve and hydraulic hold.