What Causes Abnormal Noise at the Moment of Car Ignition?
2 Answers
This is caused by excessively low engine oil temperature and low ambient temperature. When the oil temperature is too low, the various components inside the engine lack lubrication, leading to increased friction between parts, which results in some abnormal noises. This is a normal phenomenon. Below is relevant information about engine oil: 1. Engine oil is referred to as the lifeblood of the engine. Inside the engine, it not only lubricates but also cleans, seals, cushions, prevents rust, and dissipates heat. Without engine oil, the engine cannot operate properly. 2. During engine operation, the oil forms a thin film on the surfaces of various components, preventing direct contact and friction between them. If components directly contact and rub against each other, it will accelerate engine wear and generate a large amount of heat instantaneously, which is highly detrimental to the engine. 3. Over time, the performance of engine oil degrades, so it needs to be replaced regularly. Prolonged failure to change the oil will increase engine wear. During each oil change, the oil filter should also be replaced. The oil filter is used to clean the oil; without it, the oil will become dirty after some use, affecting the engine's lubrication and heat dissipation.
Over the years of driving, I've encountered abnormal noises during ignition several times. The most common issue is with the starter, such as gear wear or jamming, which causes a rattling sound when the engine starts. Belt tension is also crucial, especially when the power steering pump belt ages and slips, producing a particularly harsh squealing noise. Cold starts make it more noticeable because the oil hasn't fully lubricated yet, causing the valve lifters and chain tensioners to produce a ticking sound. If the flywheel ring gear has missing teeth, there will also be abnormal noises during ignition. Oh, and insufficient battery power can cause the starter to malfunction and produce strange sounds. I recommend getting it checked as soon as possible. Last time, I didn't repair it promptly and ended up completely stranded at a highway rest area.
