What are the solutions for engine knocking?
2 Answers
Engine knocking can be addressed by: 1. Delaying the ignition timing; 2. Cleaning the fuel system and injectors; 3. Using qualified fuel additives; 4. Choosing fuel suitable for the engine's compression ratio; 5. Repairing or replacing the water pump. The causes of engine knocking include: 1. Carbon deposits in the combustion chamber; 2. Low fuel octane rating; 3. Incorrect ignition timing; 4. Overheating of the engine; 5. Incorrect air-fuel ratio. Engine maintenance methods include: 1. Using high-quality engine oil; 2. Using qualified coolant; 3. Regularly cleaning radiator scale; 4. Periodically removing carbon deposits from the car; 5. Timely replacement of the car's air filter, oil filter, and fuel filter.
I've experienced this before. Last time when I was driving my old car on the highway, I also heard loud knocking sounds from the engine bay, which was quite scary. The repair shop later told me it was engine knocking, mainly caused by using low-quality gasoline. The mechanic advised me to immediately release the throttle to reduce RPM when knocking occurs, and not to press hard. Afterwards, it's best to switch to a reputable gas station and use higher-octane fuel, as long-term use of low-octane fuel can cause problems. Also, spark plugs should be replaced when needed - aged plugs with inaccurate ignition timing can also lead to knocking. For cars with severe carbon buildup, the combustion chamber needs cleaning. I personally use fuel additives regularly with decent results, but serious cases require disassembly cleaning. Knocking damages the engine, so address any abnormal sounds promptly.
