What to Do If the Engine Noise Increases After Maintenance?

[Nunes]

Solutions for increased engine noise after maintenance include: 1. Installing high-grade sound-absorbing foam materials on the engine cover to suppress vibrations caused by the hood; 2. Inspecting and replacing the intake and exhaust pipes if necessary; 3. Using heat-insulating pistons to raise the combustion chamber wall temperature, shorten the ignition delay period, and reduce combustion noise in direct-injection diesel engines with space-atomized combustion systems. Reasons for increased engine noise after maintenance may include: 1. Insufficient engine oil or cold engine oil not yet warmed up, leading to inadequate oil pressure; 2. Excessive impurities or dirt in the engine oil, preventing effective regulation of oil pressure; 3. Mechanical interference in the engine or blockage in the lubrication oil passage.