What causes the abnormal noise from the belt during cold start of the Teana?
3 Answers
The causes of abnormal noise from the belt during cold start of the Teana are: 1. Aging of the drive belt: The main component of the drive belt is rubber, which becomes hard and brittle in winter, reducing the friction coefficient. The motor belt not only drives the generator but also powers the compressor, power steering pump, water pump, and other accessories. 2. Severe belt wear: Severe wear on the old belt drastically reduces the contact area between the belt and the pulley. In this case, pressing the belt hard will cause it to sink deeply into the pulley groove. 3. Insufficient belt tension: When the tension is insufficient, the belt is prone to slipping. Modern belts are self-tensioning, and a loose belt can also cause abnormal noise.
As a long-term owner of a Teana, I've encountered the issue of belt squealing during cold starts a few times. The main causes are belt aging or insufficient tension, where the rubber hardens and contracts in cold weather, leading to slipping and squeaking. This usually involves the alternator belt or air conditioning belt system, caused by friction from the engine accessory pulleys not rotating smoothly. If left unaddressed, it may worsen into a belt breakage, resulting in the alternator not generating electricity or air conditioning failure, which could compromise driving safety. A simple check for cracks or tension in the belt is recommended, followed by adjusting the tension or replacing the belt at a repair shop. Regular maintenance can prevent this issue—for example, inspecting the belt every two years, especially in northern winters, to avoid sudden problems while driving.
As a car DIY enthusiast, I've found that belt issues are quite common when repairing cold-start squealing noises in the Teana. The main causes are belt aging and loosening - during cold starts when the engine compartment temperature is low, belts tend to contract and slip, producing high-pitched sounds. Another possible reason is dirty or dusty pulley surfaces, which increases friction noise. Simple self-checks are easy: listen whether the sound comes from the belt area, or open the hood to check for wear marks on the belt. For minor issues, applying some belt lubricant spray can provide temporary relief. However, prolonged squealing carries significant risks - if the belt breaks, you could end up stranded on the road. It's best to have it professionally addressed promptly. Replacing the belt isn't expensive, costing around 200 RMB, so don't delay the repair.
