By the general quality of grey cast iron or alloy cast iron cylinder
cover, car with gasoline engine is used Aluminum Alloy cylinder head. Aluminum
Alloy good thermal conductivity, can improve the compression ratio of the
engine. Secondly, the casting performance is excellent, suitable for the casting
of complex parts. It must be noted Aluminum Alloy cylinder head cooling control
the bottom plane of the temperature below 300 DEG C. Otherwise, the bottom plane
of overheating will cause plastic deformation and warping The processing, the exhaust valve seat hole, valve guide hole, a spark plug mounting hole (gasoline engine) or fuel injector hole in the cylinder cover.














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