What Causes the Ticking Sound After an Oil Change?

[SanAmara]

The engine's function is to convert the thermal energy of gasoline into mechanical energy by burning the fuel in a sealed cylinder, which expands the gas and pushes the piston to perform work. The reasons for the ticking sound after an oil change are: 1. Excessive carbon buildup in the engine; 2. The oil quality does not match the engine's requirements; 3. The throttle or fuel injector has not been cleaned for a long time, the spark plugs have not been replaced, or there is an intake manifold fault or engine misfire; 4. The oil filter, air filter, or cabin air filter has not been replaced for an extended period; 5. The timing gears have worn out significantly due to prolonged use without replacement, causing loose meshing and resulting in noise and jerking sensations.