How to Remove Carbon Deposits on Valves?
2 Answers
Engine valve carbon deposits can be removed using the walnut shell blasting method. The walnut shell blasting method involves grinding walnut shells into powder and then using a specialized machine to blast the walnut shell particles. Below is an introduction to valve carbon deposits: 1. Detection: Disassembly Method: Dismantle the engine to check for carbon deposits. This method is straightforward but time-consuming and labor-intensive. Moreover, each disassembly and reassembly of any component may more or less affect its performance and shorten its service life. 2. Hazards: Carbon deposits reduce the intake channel, which can easily lead to a decrease in cylinder air intake during high-speed driving and acceleration, lowering the engine's air charging coefficient. This results in reduced engine power and poor vehicle acceleration. 3. Maintenance Interval: Generally, carbon removal should begin at around 20,000 kilometers, and it is essential to remove carbon deposits after exceeding 40,000 kilometers.
I usually work on my car myself. Last year, I dealt with valve carbon deposits just by using a bottle of fuel additive: choose a reputable brand, pour it into the fuel tank, drive on the highway for half an hour to let the engine run at high RPM, and the carbon deposits will dissolve and be expelled. For mild carbon buildup, this method is cost-effective and effortless, costing just around 10 yuan, but remember to check fuel levels and safety before hitting the highway. If the buildup is severe, don’t DIY—take it to a professional shop for spray cleaning to avoid damaging engine components. To prevent carbon buildup, use high-quality gasoline and avoid frequent short trips. Keeping the engine healthy extends its lifespan and saves fuel—a win-win. I make it a habit to check monthly.