How to Clean Engine Carbon Deposits?

2 Answers
VanGianna
07/24/25 10:03am
Engine carbon deposit cleaning methods are: 1. Remove the engine cover, take off the throttle body, clean it with carburetor cleaner, dry it with a cotton cloth, and reinstall it; 2. Open the oil cap, pour in the entire can of cleaner, close the oil cap, start the engine and let it idle for 10 minutes before turning it off; 3. Before refueling, add the entire bottle of fuel additive to the fuel tank; 4. Pour the intake system cleaner into the liquid storage tank of a dedicated cleaning device, connect it to the intake system, start the engine to use vacuum to draw the cleaner into the intake pipes for cleaning. Additional information: Carbon deposits refer to sludge-like colloidal substances formed when fuel and oil vapor that enters the combustion chamber cannot be completely burned. These deposits accumulate on components such as intake and exhaust valves, spark plugs, fuel injectors, and piston tops. Under repeated high-temperature conditions in the engine, these substances eventually form carbon-like deposits.
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AugustAnn
08/11/25 5:15am
I enjoy working on my car myself in my spare time. The simplest way to clean engine carbon deposits is by using fuel additives. Just pour the additive into the fuel tank, fill up with gas, then drive on the highway for about 30 minutes while keeping the RPM above 3000 to burn off the carbon deposits through high-speed engine operation. If the situation isn't too severe, this can solve the problem for just a few dozen yuan. Additionally, excessive carbon buildup in the throttle body can restrict airflow and affect performance. I can remove it and spray it with throttle body cleaner, then wipe it clean with a soft cloth, being careful not to damage any electronic components. Performing this maintenance regularly every 10,000 kilometers can prevent carbon buildup. For safety, I always work in a well-ventilated area and wear gloves to avoid contact with chemicals. This method is cost-effective and convenient, perfect for DIY car enthusiasts like me who want to save on repair shop expenses.
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