Bimetal engine gasket facing technical problems

 Replace the engine cylinder head gasket is a very difficult job. For many of the technical staff for maintenance plant , doing this work because many times just like in the same nightmares . If a car for the first time a replacement cylinder head gasket , there is no good in accordance with the technical requirements , then this car will definitely return at some point this repair factories require repair.
If you do not use the correct cylinder gasket , do not follow the correct methods of operation or did not make the right checks , made ​​the effect of sealing certainly will not be desirable . Gasoline engine cylinder head gasket chamber pressure must be sealed in l000psi (1psi = 6.89kPa) above , the turbocharged diesel engine combustion chamber pressure container seals in '7200psi more. Moreover, cylinder head gasket must be able to withstand over 2000 degrees Celsius . High temperature and pressure in such poor working environment, even the presence of the cylinder head sealing minor defects , will lead to replacement of the engine cylinder head gasket failure of the work . Bimetal engine cylinder block and cylinder head are made of different metal compounds formed , his presence makes the engine cylinder head gasket replacement work has become more complex.
Now used by most bimetal engine includes a cylinder block with cast iron and an aluminum cylinder head . Since different metals and alloys thermal expansion and contraction rates are different, barrier seals so the bi-metallic materials to design a successful engine cylinder head gasket , the gasket of many manufacturers are facing a challenging technical problems.