If there is oil on the spark plug, the problem remains relatively serious. This situation will not only cause poor vehicle acceleration and unstable idling, but in severe cases it will also prevent the engine from operating normally. Therefore, once a spark plug is found in the engine oil, the car owner should go to the repair shop for maintenance in time to avoid unnecessary trouble.
The reasons for the presence of oil on the spark plug are:
The valve cover gasket may be damaged and the oil may enter into the spark plug and stays there. The car owner must replace the valve cover gasket with a new one. The price Probably around a few dozen yuan.
It is also possible that the spark plug seal ring is damaged, causing oil to enterile in the spark plug. The car owner will find that there is oil on the spark plug thread. just replace the sealing ring. The price is not expensive, and it is only about tens of yuan.