What causes the zizzing sound after starting the car?
4 Answers
The reasons for the zizzing sound after starting the car are as follows: 1. Carbon brush damage: It may be due to a fault in the carbon brush inside the starter motor; 2. Belt aging: Over time, the engine belt may age and slip, producing a squeaking sound; 3. Loose screws: Loose engine mount bolts may cause improper engine support installation. Here are the solutions for the zizzing sound after starting the car: 1. Loose screws: If it's due to loose engine mount bolts, you can locate and tighten the specific screws yourself; 2. Belt aging: If the belt is loose or aged, replacing it with a new one can resolve the issue. 3. Carbon brush damage: If the carbon brush inside the motor is faulty, it's best to seek professional help at a 4S shop and avoid dismantling the engine yourself.
My car keeps making noise, and the squealing sound after starting is mostly due to a loose or cracked belt. There are several belts in the car engine, such as those driving the alternator and compressor. Over time, rubber aging can cause them to slip and make noise. It could also be worn bearings in the alternator or air conditioning compressor, which squeak when they rotate. Vacuum leaks can produce this sound too, especially if old pipes crack and leak. You need to check it immediately—if a belt breaks, it can cause serious problems. You can roughly locate the source by listening yourself or take it to a repair shop for a mechanic to diagnose with a stethoscope. Regular belt maintenance is important—inspect for cracks periodically and don’t wait until they fail completely. Safety first!
From experience, the buzzing sound after startup usually comes from the belt system. The car belt drives the generator and compressor, and when worn, it slips or becomes loose, causing noise. If it's an issue with the air conditioning compressor, the sound becomes more noticeable when the AC is turned on. Also, check the belt tensioner and water pump bearing—these components can become noisy when they age. Vacuum system leaks are another common source, with cracks in the intake pipes causing similar sounds. It's recommended to first visually inspect the belt condition. If nothing seems abnormal, start the car and listen for the direction of the sound source. If the noise persists, it's best to seek professional inspection. Don't underestimate these minor issues, as they could potentially damage other engine components. Timely replacement of parts can prevent bigger problems. As cars age, they tend to develop some noise, so developing a habit of regular checks is crucial.
My car has had a similar issue before. A squealing sound after starting is often caused by belt problems. Loose or worn alternator belts are the most common culprits, and the compressor may also make noise when engaged. Worn bearings in components like the tensioner pulley can cause squeaking, as can air leaks. If the sound is coming from the front of the engine, it's likely belt-related. A simple fix is to check if the belt is cracked - you can inspect it yourself. If needed, replacing it at a service station will solve the problem. Don't let a small issue turn into a big one.
