After changing the oil, there can be multiple reasons for the engine to start vibrating. First, overfilling the oil can cause internal pressure to rise, leading to the formation of gel-like carbon deposits. This not only causes idling vibrations but can also clog the catalytic converter, resulting in excessive exhaust emissions and even oil burning.
Secondly, using oil with viscosity and quality that do not match the vehicle model can directly affect oil circulation, which might make the engine feel shaky at idle. Additionally, a faulty exhaust gas recirculation (EGR) valve could be another factor for the vibrations, as problems with the EGR valve can cause uncontrolled exhaust gas recirculation, impacting smooth air intake and causing idle vibrations.
How to Avoid These Problems?
The key is to carefully select the appropriate oil and conduct regular maintenance to ensure the engine operates normally. Checking if the oil meets the standards is also crucial. Additionally, vehicles that have not been maintained for a long time should be monitored for excessive carbon buildup. Therefore, paying attention to these details after an oil change can ensure the engine runs smoothly and extend its lifespan.
