What causes the buzzing sound in Changan CS75?
3 Answers
Changan CS75 abnormal noise is caused by engine noise, transmission noise, and wear. The following is a specific analysis of the causes of abnormal noise in Changan CS75: Engine noise: The probability of abnormal noise in the engine compartment is relatively high. Most people also judge the source of the noise as coming from the engine compartment, usually a sharp metal sound or a wind-like noise. If the noise disappears after increasing the engine speed and there is no significant change in the noise throughout the usage process, it is considered a harmless noise that can be temporarily tolerated and repaired at an appropriate time. Transmission noise: If there is noise inside the transmission while driving, and it disappears when the clutch or accelerator is pressed, and there is a whistling-like sound when shifting gears, check whether the transmission gears are excessively worn. If the wear is too severe, replacement is needed. Also, check whether the transmission lubricant needs to be replaced. Long-term failure to replace the transmission lubricant can cause abnormal noise in the transmission. Wear: When stepping on the accelerator or brake while driving, there are always some abnormal noises from certain parts of the car body. The sound is not loud and does not affect normal driving.
A few days ago, I was chatting with my friend about the humming noise from his Changan CS75, which is probably a common issue. The most common cause is tire problems, such as incorrect tire balance or uneven wear, especially at high speeds where the noise becomes a constant hum. It could also be due to worn wheel hub bearings, causing noise when driving due to rough rotation. I've encountered several cases where the humming noise increases during turns or becomes noticeably worse at speeds above 60 km/h, indicating loose points in the suspension system. If not addressed promptly, the wear will worsen, leading to increased fuel consumption or even the risk of a tire blowout. It's best to check the tire pressure and surface wear immediately and replace the tires or inspect the bearings if necessary.
My CS75 has been running for three years, and last year it started making a buzzing noise. At first, I thought it was the air conditioning fan, but the sound persisted even on smooth roads. After some research, I found that the buzzing mainly comes from the aging of the drivetrain or suspension components, such as loose shock absorber bushings or unfastened chassis screws. The noise becomes especially noticeable during deceleration or acceleration, indicating a change in the resonance point. Later, I had the repair shop check it, and they found that the rear suspension link was loose—tightening it fixed the issue. I recommend other owners not to delay and get it checked by a professional shop early to avoid small problems turning into costly and time-consuming repairs.
