How to determine whether the cylinder head gasket seals in good condition?

1, open the radiator cap (note hot car, do not open the radiator cap, to prevent burns), to keep the engine speed operation, this time to observe the radiator, if there are air bubbles constantly parher braided hose fittings swarmed, then the cylinder head gasket seal bad. The more bubbles, the more serious leak. 2, when the cylinder head gasket was badly damaged in the cylinder head and cylinder block cast around at the combine oil, as observed junction bubbles emerge, indicating that the cylinder head gasket seal failure, should replace it. Energy saving cylinder liner into the mainstream international market cooled in heat Engine cylinder liner is the heart ventricle, the internal combustion engine is one of the most important and critical components. It is with the pistons, piston rings acting together to form an internal combustion hydraulic hose machine engine system, the internal combustion engine is the worst working conditions (high temperature, high pressure, strong, strong grinding), high load strength, special materials, the manufacturing process of complex parts. Precision cylinder liner up μ grade, high technology content, directly affect the quality and life of the engine, thus affecting the internal combustion engine powered passenger cars, commercial vehicles, construction machinery, ships, agricultural machinery, garden machinery and railway locomotives other energy-saving, environmental protection, reliability, economy and power of the engine power