What Causes Abnormal Noise When the Engine Just Starts?
1 Answers
It is caused by a fault in the carbon brushes inside the starter motor. Below is an introduction to the reasons for abnormal noise when the engine just starts: Reasons for abnormal noise: Over time, the engine belt may age and slip, producing a squeaking sound; loose engine mount bolts can cause improper engine support installation. If the engine mount bolts are loose, you can locate and tighten the specific screws yourself. If the belt is loose or aged, causing a buzzing sound, you can replace it with a new one. If there is a fault in the carbon brushes inside the starter motor, you should seek professional help at a 4S shop and avoid disassembling the engine yourself. Maintenance awareness: With high mileage and prolonged use, the engine valves and hydraulic components will experience a certain degree of wear. When the wear becomes excessive, abnormal noises may occur. To resolve this issue, the cylinder head needs to be disassembled to replace these components. A way to mitigate this problem is to change the oil regularly. Avoid overusing engine oil, as excessive use can degrade its lubrication effect, thereby accelerating the wear of valves and hydraulic components. During cold starts, due to the viscosity and poor fluidity of the oil, operational noise may occur in the short term, and slight noise may be heard when moving parts come into contact.
