What causes the loud reverse sound in the 2021 Leiling Hybrid?
2 Answers
Leiling Hybrid 2021 model's loud reverse sound is mainly caused by valve failure. The following are relevant details: 1. Introduction: The edge thickness of the valve is generally 1~3mm to prevent damage from impact with the valve seat during operation or being burned by high temperatures. To reduce intake resistance and improve cylinder intake efficiency, most engines have larger intake valves than exhaust valves. Used intake valves and exhaust valves also differ in color. 2. Causes: Adjusted valve clearance has changed (due to insecure locking or wear between the valve stem and driving parts), valves not properly adjusted. Valve adjustment screw wear, loose lock nut, excessive or inconsistent valve clearance. Wear and grooving of the valve spring seat, excessive wear between the valve stem and guide.
As the owner of this vehicle, I can tell you that loud noises while reversing are actually quite common, especially in hybrid vehicles. This is because the vehicle design intentionally includes a reversing sound alert to warn nearby pedestrians and prevent accidents. The low-speed motor in the Levin Hybrid is inherently quiet, and without the added sound, it could easily be overlooked. Since 2011, regulations have required all electric and hybrid vehicles to have such an alert system. If it's not this normal sound, it might be another issue, such as the braking system using regenerative braking, which can produce a whirring noise during reversing that may sometimes be louder. Alternatively, it could be due to loose suspension components or worn wheel hub bearings causing unusual noises. I recommend checking the owner's manual first to see if the alert volume can be adjusted. If not, a comprehensive inspection at the dealership is advisable—safety during reversing is no small matter.
