What are the hazards of carbon deposits to the engine?

2 Answers
DelWalker
07/25/25 9:16am
Carbon deposits can cause inaccurate air-fuel ratios in car engines and also lead to incorrect compression ratios, which can affect the engine's power output and fuel consumption, and may even cause damage to the engine. Here is more relevant information: 1. Causes of carbon deposits: It is quite normal for carbon deposits to form in the engine. Carbon deposits are formed due to incomplete combustion of the combustible mixture. 2. Areas prone to carbon deposits: The intake tract, combustion chamber, and fuel injectors are the parts of the engine most likely to develop carbon deposits. 3. Hazards of carbon deposits: If there are carbon deposits in the combustion chamber, it can increase the engine's compression ratio, leading to knocking. Knocking is an abnormal combustion phenomenon in the engine. Knocking can affect the engine's power output and fuel economy, and severe knocking can even damage the engine.
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VanAlan
08/11/25 7:14pm
I've worked in an auto repair shop for many years and have seen many failures caused by carbon deposits. It mainly deposits on places like the top of engine pistons and cylinder walls, which can significantly reduce combustion efficiency. The car struggles to start, especially during cold winter mornings. Fuel consumption also noticeably increases, costing more money for the same distance traveled, which becomes a significant expense over time. Worse yet, it can easily cause engine knocking, producing a metallic tapping sound, and prolonged exposure may damage piston rings or cylinder walls. Carbon buildup on the valves can cause poor sealing, reducing compression ratio, making the car feel sluggish and weak. Sometimes, if the intake tract gets clogged, acceleration becomes uneven, leading to a poor driving experience. I believe regular carbon cleaning is important—using cleaning agents or driving at high speeds to rev the engine can help prevent it.
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