Is it normal for the VV7 engine to make abnormal noises?
4 Answers
It is normal for the VV7 engine to make abnormal noises. Since the engine is a direct injection engine, the fuel is injected directly into the cylinder during operation. Additionally, the direct injection engine is equipped with a high-pressure pump, which can produce abnormal noises during operation. This is considered a normal phenomenon. Causes of abnormal engine noises in cars: 1. Aging engine mounts: Engine mounts are rubber blocks placed between the engine and the frame. Their purpose is to reduce vibrations and provide cushioning during engine operation while securing the engine in place. Once these mounts age or become loose, the engine may shake, leading to abnormal noises. 2. Engine misfire: This mainly refers to one or more cylinders not functioning properly. The exhaust gas flow will show noticeable interruptions, and the exhaust pipe may shake significantly. This phenomenon is often related to issues with the ignition coil. 3. Poor lubrication: Due to insufficient lubrication, excessive wear may occur between the piston and cylinder wall, causing the clearance between them to exceed normal tolerances. This results in noticeable knocking sounds during idle or low-speed operation. 4. Overly rich fuel mixture: When the engine's air-fuel mixture is too rich, it may be difficult to start. After starting, acceleration may be sluggish, and the engine may run unevenly. The exhaust pipe may emit black smoke, accompanied by popping or knocking noises. Methods for diagnosing abnormal engine noises: 1. Manual inspection: This mainly involves using a stethoscope, performing a cylinder cut-off test, and adjusting the throttle opening to listen and observe changes in abnormal noises. During the inspection, it is also important to monitor the color and volume of exhaust smoke and the readings of various gauges. 2. Instrument diagnosis: Since different types of engine noises and vibrations have distinct sound levels, pressures, and amplitudes, any wear in engine friction pairs, increased clearance, or loosening of components can produce abnormal noises and vibrations. These can be reflected through specialized diagnostic instruments.
I've been driving the VV7 for several years, and encountering abnormal engine noises is no small matter. A normal engine should run with a steady hum. If you hear clicking or squeaking sounds, it's likely there's a problem. It could be a loose timing chain, worn bearings, or sometimes an aging belt. I once experienced a similar situation where the noise kept getting louder. When I took it to the dealership for inspection, they found that the piston rings were worn and needed replacement. I suggest you don't take it lightly and go to a professional repair shop for diagnosis immediately. Otherwise, it could lead to more severe damage or even safety hazards. During regular maintenance, check engine components more often and change the oil periodically to effectively prevent such issues. Safe driving is the top priority.
I'm quite familiar with the VV7, and engine abnormal noise is definitely not normal. Most of the time, it's due to component issues, such as improperly adjusted timing chains or a failed water pump bearing causing a buzzing sound. I often check the engine oil level myself, as too low a level can accelerate wear and lead to abnormal noises. I recommend gently opening the engine hood to listen for the source location, but don't risk repairing it yourself—taking it to a repair shop is more reliable. Some minor issues, if delayed, may turn into major repairs, costing both time and money. Pay more attention to your vehicle's health to reduce on-road troubles and maintain driving pleasure.
When I hear abnormal engine noises while driving the VV7, I become alert. This is usually not a normal phenomenon, and squeaking sounds may be caused by loose belts or insufficient lubrication. For safety reasons, I recommend going to a repair shop immediately for inspection to ensure the car is safe to drive. Regular maintenance, such as changing the engine oil, is crucial to prevent potential issues.
