What are the causes of abnormal noises in Lavida cars?
3 Answers
Abnormal noises in SAIC Volkswagen Lavida depend on the engine's speed state. The causes of abnormal noises are: 1. Excessive clearance between the piston and cylinder wall; 2. Over-tight assembly of the piston pin or connecting rod bearing. The phenomena and causes of abnormal noises: 1. If a cylinder misfires, the abnormal noise disappears or reduces. The causes include: piston knocking on the cylinder; loose connecting rod bearing; piston ring leakage; broken piston pin. 2. If a cylinder misfires, the noise intensifies, or noise appears when there was none before. The causes include: loose piston pin copper sleeve; excessive taper of the piston skirt; piston pin displacement; excessively loose connecting rod bearing cap bolts or melted connecting rod bearing alloy; excessively loose flywheel bolts. 3. If two adjacent cylinders misfire, the abnormal noise reduces or disappears. The cause is: loose crankshaft bearing.
My Lavida used to have various abnormal noises as well. As a seasoned driver with over a decade of experience, I think the most common issues with this car are in the suspension system and braking components. For example, when going over speed bumps, if there's a clunking sound, it's mostly due to aging shock absorber bushings. Volkswagen cars, especially entry-level models like the Lavida, are prone to this, and frequent driving on rough roads can accelerate the wear. Brake noises, such as squeaking, might be caused by uneven wear of the calipers or brake pads—checking their thickness can usually confirm this. Additionally, interior rattles can be quite annoying, like loose plastic parts in the dashboard or door panels that make tapping sounds when going over bumps. Sometimes, reinforcing them with glue can solve the problem. Honestly, these minor issues aren't too serious, but getting them checked at the dealership early can prevent more expensive repairs. After all, abnormal noises can affect your driving mood and concentration, and safety comes first. I recommend a comprehensive inspection every six months, paying special attention to the tightness of the chassis screws.
My Lavida is a new car only two years old, but a few days ago, a 'clicking' abnormal noise started coming from the engine bay, which is quite annoying. After checking some materials and discussing with friends, it might be due to a loose engine belt or a problem with the tensioner, as the belt system in Volkswagen engines occasionally acts up like this. There was also an abnormal noise once when turning, and a friend suspected it might be due to worn half-shaft bearings, which need to be replaced promptly to avoid affecting steering safety. There's also a slight vibration noise in the dashboard area when the air conditioning starts, probably due to loosely installed plastic parts expanding and contracting with daily temperature changes. Although these minor issues don't affect driving, ignoring them long-term could increase repair costs. I plan to address them during the weekend maintenance. I've also learned some simple detection techniques, like identifying the source of the noise by listening, to preliminarily locate the abnormal sound. Paying more attention to sound changes while driving can help quickly detect abnormalities.
