Cylinder bed flush means that the sealing gasket between the cylinder head and the cylinder block is damaged and loses its sealing function. After the engine is operated, the high-pressure airflow from the combustion chamber rushes out from the damaged area. Extended information

The cylinder gasket is located between the cylinder head and the cylinder block, also known as the cylinder bed. Its function is to fill the microscopic pores between the cylinder block and the cylinder head to ensure good sealing at the joint surface, thereby ensuring good sealing at the joint surface. Ensure the combustion chamber is sealed to prevent cylinder air leakage and water jacket water leakage.

Reference materials: Baidu Encyclopedia ?Cylinder gasket