What causes abnormal noise in the Lavida's cold engine?

[LaJosephine]

Lavida's cold engine abnormal noise mainly has the following reasons: 1. Generator belt is too loose or has foreign objects: When starting a cold engine, if the belt is too loose, it can cause severe slippage, resulting in friction and abnormal noise; foreign objects in the belt, such as sand or small stones, can also cause abnormal noise. 2. Fuel pump failure: A faulty fuel pump can easily lead to low oil pressure, poor atomization of the fuel injector, causing an imbalance in the air-fuel mixture ratio and incomplete combustion, resulting in engine abnormal noise. 3. Oil pump bearing failure: A faulty oil pump can cause low oil pressure in the lubrication system, leading to problems in the circulation of lubricating oil, insufficient lubrication, and dry friction in the engine, causing abnormal noise.

[JulianLynn]

I've been driving a Lavida for over a decade, and it's quite common to hear strange noises during cold starts. Usually, it's because engine components contract in low temperatures, and belts may squeak due to aging or looseness. If the belt isn't replaced for a long time, it can easily cause issues. Additionally, the lubrication system doesn't provide enough oil pressure when the engine is cold, leading to dry friction in bearings or chains, which results in clicking sounds. My advice is to first identify the source of the noise: if it's coming from the front, it might be the fan belt; if it's inside the engine, you should check for piston or valve wear. Regular maintenance, such as timely oil and belt replacements, along with periodic checks for bolt tightness, can significantly reduce these noises. Another key point is that new cars are prone to loosening after the break-in period, so paying extra attention during the first year of ownership can prevent issues. If you do encounter strange noises, don't rush to drive—warming up the engine for a few minutes before starting is safer.

[MadisonRose]

As a DIY car enthusiast, I believe cold-start noises can be easily diagnosed. First, pop the hood and locate the noise during startup: high-pitched squealing usually indicates belt issues (like worn serpentine belts or slippage), while deep knocking may point to dry bearings. I personally check belt tension by pressing with my fingers – if it's too loose, it needs tightening. For lubrication, using premium synthetic oil in cold weather significantly reduces noises. Common culprits also include loose water pump or alternator belts. Preventatively, I replace belts and oil regularly before noises escalate. If the sound worsens persistently, visit a mechanic for professional diagnostics – don't let small issues become major repairs. Regular engine monitoring and good maintenance habits are key.

[VonLyla]

I experienced a screeching noise when starting my cold Volkswagen Lavelle to take the kids to school. The cause is usually simple, like a loose belt or insufficient engine oil, as low temperatures increase metal friction. I drove straight to the repair shop, where they replaced the belt and changed the oil, solving the problem. I recommend not trying DIY fixes—safety first, especially in winter. Warming up the engine for a few minutes before driving can help. Ignoring it may damage the engine, leading to higher repair costs. Developing a habit of pre-start checks can prevent minor issues from escalating.